FCC ID: OJMOTX400HHKF Keyfob Transmitter

DS Keyfob Transmitter Data Guide Table of Contents 1 Description 1 Features 1 Applications 1 OEM Configurations 2 Ordering Information 2 Electrical Specifications 3 Theory of Operation 4 Setting the Transmitter Address 4 Button Assignments 5 Contention Considerations 5 Battery Replacement 5 Assembly Diagram 6 Compliance Requirements 6 Labeling / Instruction Requirements 8 Typical Applications 10 Resources 11 Notes

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Warning: Some customers may want Linx radio frequency (RF) products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (Life and Property Safety Situations). NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module should be modified for Life and Property Safety Situations. Such modification cannot provide sufficient safety and will void the products regulatory certification and warranty. Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application. Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/

decoder to validate the data. Without validation, any signal from another unrelated transmitter in the environment received by the module could inadvertently trigger the action. All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping implemented are more subject to interference. This module does not have a frequency hopping protocol built in. Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could cause product failure which is not immediately evident. Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications and may cause product failure which is not immediately evident. DS Keyfob Transmitter Data Guide 1.00"

Description The Linx DS Series Keyfob transmitter is ideal for general-purpose remote control and command appli cations. It has been pre-certified for FCC Part 15, Industry Canada, and European CE (433MHz only) compliance, reducing development costs and time to market. Available in 315, 418

(standard), or 433.92MHz, this stylish and compact remote has a range of up to 750 feet when combined with an LR or LT Series module. The Keyfob can be configured with 1 to 5 buttons and the keypad and labeling can be modified to meet specific customer requirements. Selectable addressing provides security and allows the creation of up to 1,022 distinct transmitter-receiver relationships. The Keyfob is available in black, white, or translucent colors. The transmission can be decoded using an LR or LT Series receiver paired with a DS Series decoder IC or microcontroller. The unit operates from a single 3V CR2032 lithium button cell. S4 S1 S5 S3 2.23"

S2 1.37"

0.45"

Figure 1: Package Dimensions Figure 2: Keyfob Button Configurations OEM Configurations With a one-time NRE and minimum order, Linx can configure the keypad and label areas. Contact Linx for details. Features FCC, IC and CE pre-certified Long range Applications General remote control Keyless entry Garage / gate openers 1 to 5 buttons Compact, stylish package Lighting control Home / industrial automation Wire elimination 1 Revised 9/8/14 Ordering Information Ordering Information Part Number Description OTX-***-HH-KF#-DS-xxx DS Keyfob Transmitter EVAL-***-HH-KF#-DS DS Keyfob Evaluation Kit

*** = 315, 418 (Standard) or 433.92MHz xxx = Color (Leave blank for standard black) WHT = White CRE = Red CGY = Gray Figure 3: Ordering Information Electrical Specifications Keyfob Electrical Specifications Designation Min. Typ. Max. Units Notes 2.1 3.0 3.4 5.0 3.6 VDC mA nA 1 VCC lCC lPDN FC 315 418 433.92 9,600 MHz MHz MHz kHz bps 40

+85 C 1 Parameter Power Supply Operating Voltage Supply Current Power-Down Current Transmitter Section Transmit Frequency Range OTX-315-HH-KF#-DS OTX-418-HH-KF#-DS OTX-433-HH-KF#-DS Data Rate Environmental Operating Temperature Range 1. Characterized, but not tested Figure 4: Electrical Specifications Center Frequency Accuracy 50

+50 Theory of Operation The DS Series Keyfob Transmitter combines a high-performance synthesized transmitter with an on-board encoder IC to form a highly reliable, yet cost-effective RF remote control transmitter. The transmitters synthesized architecture delivers outstanding stability and frequency accuracy while minimizing the effects of temperature, antenna port loading and mismatching. This reduces or eliminates frequency pulling, bit contraction, and other negative effects common to SAW-based transmitter architectures, providing a significantly higher level of performance and reliability. When a button is pressed on the Keyfob, power is applied to the internal circuitry and the encoder IC is enabled. The encoder detects the logic states of the address lines and button data lines. These states are formatted into a data packet. The encoder data is used to modulate the transmitter, which, through the antenna, conveys the data into free space. This continues until the button is released. On the receiver side, a DS Series decoder IC is used to check the transmitters address bits against the address settings of the receiving device. If a match is confirmed, the decoders outputs are set to replicate the transmitters button states. These outputs can then be used to activate external circuitry required by the application. The transmitter is compatible with the Linx LR Series receiver and LT Seires transceiver modules. Ranges of up to 750 feet are possible when the transmitter is combined with the receiver and a good antenna. Applications operating over shorter distances also benefit from the increased link reliability and superior noise immunity provided by the LR and LT Series modules. The DS Series encoder inside the Keyfob transmitter uses a serial protocol to encode the states of the buttons and addresses. The serial protocol is much more immune to bit edge jitter than pulse width protocols, such as those used by Holtek devices. This gives much better range and performance within that range. This also gives the DS better immunity to noise from motors, switching power supplies, high current drivers and other noise sources. This serial protocol updates the data line states on every packet. This, combined with a faster data rate, give the serial protocol a much faster response time than the Holtek protocol (36.5ms typical compared to 135ms). 2 3 Contention Considerations It is important to understand that only one transmitter at a time can be activated within a reception area. While the transmitted signal consists of encoded digital data, only one carrier of any particular frequency can occupy airspace without contention at any given time. If two transmitters are activated in the same area at the same time, then the signals will interfere with each other and the decoder will not see a valid transmission, so it will not take any action. Battery Replacement The transmitter utilizes a standard CR2032 lithium button cell. In normal use, it provides 1 to 2 years of operation. Access for replacement is accomplished by gently prying apart the two halves of the Keyfob at the seam (fingernails or a coin will do). Once the unit is open, remove the battery by sliding it out from beneath the retainer. Battery There may be the risk of explosion if the battery is replaced by the wrong type. Replace it with the same type of battery while observing the polarity shown in Figure 7. Assembly Diagram Figure 7: Battery Access Setting the Transmitter Address The Keyfob allows the selection of one of 1,022 unique addresses. All keyfobs are supplied set to the same address. The address can be changed to avoid contention with other units or to create unique relationships. This is accomplished by cutting the address traces. The traces are accessed by removing the rear cover. Figure 5: Address Traces If the trace is intact, the address line is connected to ground, otherwise it is floating. The receivers address must match exactly in order for the units to communicate. Application Note AN-00300 describes in detail how to set the address to match any of the receivers offered by Linx. This note can be found in the Support section of the Linx website, www.linxtechnologies.com. Note: Leaving all of the traces intact or all of them cut are not valid addresses. At least one trace must be different from the rest. Button Assignments The Keyfob is available in five button configurations. Those configurations and the corresponding switch numbers are shown in Figure 6. The table shows which encoder data line has been assigned to each switch. When a button is pressed, the data line goes high, causing the corresponding data line on the decoder to go high if the address has been learned. S5 S4 S2 S4 S5 S2 S4 S1 S3 S2 S4 S1 S5 S3 S2 Button Data Line S1 S2 S3 S4 S5 D0 D1 D2 D3 D4 Figure 6: OTX-***-HH-KF#-MS Button Assignments Figure 8: OTX-***-HH-KF#-MS Assembly 4 5 Labeling / Instruction Requirements The transmitter has been pre-certified for FCC Part 15 and Industry Canada license-exempt RSS standards for an intentional radiator. The 433.92MHz version has also been tested for CE compliance for use in the European Union. The 315MHz and 418MHz versions are not legal for use in Europe. It has already been labeled in accordance with FCC, Industry Canada and CE regulations. No further labeling of the unit is needed; however, it is necessary to include the following statement in the end products instruction manual or insert card. EU does not require a statement. INSTRUCTION TO THE USER This device complies with Part 15 of the FCC Rules and Industry Canada license-

exempt RSS standard(s). Operation of this device is subject to the following two conditions:

1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Connect the equipment into an outlet on a circuit different from that to which the Increase the separation between the equipment and receiver. receiver is connected. Consult the dealer or an experienced radio / TV technician for help. The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the users authority to operate this equipment. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 6 7 Receivers The signal sent by the Keyfob transmitter can be received by the LR Series receiver module or the LT Series transceiver module. The receiver module is connected directly to the DS Series decoder, which decodes the transmitted signal. When a button is pressed on the transmitter, a corresponding line on the decoder goes high (as long as the addresses match). This can then be connected to whatever circuitry is required by the application. Figure 9: Linx Receivers Application Note AN-00300 discusses in detail how to set the addresses on all of the units. Data guides for all of the receivers and the DS Series decoder can be found on the Linx website, www.linxtechnologies.com. Typical Applications Figure 10 shows a typical schematic using the LR Series receiver and the DS Series decoder. ANTENNA GND GND VCC 1 2 3 4 5 6 7 8 NC NC NC GND VCC PDN RSSI DATA ANT GND NC NC NC NC NC NC 16 15 14 13 12 11 10 9 RXM-xxx-LR VCC VCC D0 D1 D2 D3 D4 D5 GND D6 D7 GND GND GND GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 P_SEL D0 D1 D2 D3 D4 D5 GND D6 D7 E/D_SEL D_CFG A_CFG0 A_CFG1 VT/DO TE/DI A9 A8 A7 A6 A5 A4 VCC GND A3 A2 A1 A0 LICAL-EDC-DS001 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VT VCC GND 100k 100k 100k 100k 100k 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND 100k 100k 100k 100k 100k VCC Figure 10: LR Receiver and DS Decoder Schematic The decoder has ten address lines that must match the transmitter address lines. A DIP switch is commonly used to set these, but they can also be hardwired. As long as the address lines match, when a button on the transmitter is pressed, a corresponding data line on the decoder (D0D7) goes high. These data lines can then be connected to external circuitry to perform whatever function is required by the application. 8 9 Resources Notes Support For technical support, product documentation, application notes, regulatory guidelines and software updates, visit www.linxtechnologies.com RF Design Services For customers who need help implementing Linx modules, Linx offers design services including board layout assistance, programming, certification advice and packaging design. For more complex RF solutions, Apex Wireless, a division of Linx Technologies, creates optimized designs with RF components and firmware selected for the customers application. Call +1 800 736 6677 (+1 541 471 6256 if outside the United States) for more information. Antenna Factor Antennas Linxs Antenna Factor division has the industrys broadest selection of antennas for a wide variety of applications. For customers with specialized needs, custom antennas and design services are available along with simulations of antenna performance to speed development. Learn more at www.linxtechnologies.com. by 10 11 Linx Technologies 159 Ort Lane Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com Disclaimer Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. Typical parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any specific application. It is Customers responsibility to verify the suitability of the part for the intended application. At Customers request, Linx Technologies may provide advice and assistance in designing systems and remote control devices that employ Linx Technologies RF products, but responsibility for the ultimate design and use of any such systems and devices remains entirely with Customer and/or user of the RF products. LINX TECHNOLOGIES DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY CUSTOMERS OR USERS INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. CUSTOMER AND/OR USER ASSUME ALL RISKS OF DEATH, BODILY INJURIES, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS, INCLUDING WITH RESPECT TO ANY SERVICES PROVIDED BY LINX RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS. LINX TECHNOLOGIES SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR A CUSTOMERS, USERS, OR OTHER PERSONS DEATH, BODILY INJURY, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS. The limitations on Linx Technologies liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. 2014 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, CipherLinx, WiSE and the stylized CL logo are trademarks of Linx Technologies.

HT Keyfob Transmitter Data Guide Table of Contents 1 Description 1 Features 1 Applications 1 OEM Configurations 2 Ordering Information 2 Electrical Specifications 3 Theory of Operation 4 Setting the Transmitter Address 4 Button Assignments 5 Contention Considerations 5 Battery Replacement 5 Assembly Diagram 6 Compliance Requirements 6 Labeling / Instruction Requirements 8 Typical Applications 10 Resources 11 Notes

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Warning: Some customers may want Linx radio frequency (RF) products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (Life and Property Safety Situations). NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module should be modified for Life and Property Safety Situations. Such modification cannot provide sufficient safety and will void the products regulatory certification and warranty. Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application. Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/

decoder to validate the data. Without validation, any signal from another unrelated transmitter in the environment received by the module could inadvertently trigger the action. All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping implemented are more subject to interference. This module does not have a frequency hopping protocol built in. Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could cause product failure which is not immediately evident. Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications and may cause product failure which is not immediately evident. HT Keyfob Transmitter Data Guide 1.00"

Description The Linx HT Series Keyfob transmitter is ideal for general-purpose remote control and command appli cations. It has been pre-certified for FCC Part 15, Industry Canada, and European CE (433MHz only) compliance, reducing development costs and time to market. Available in 315, 418

(standard), or 433.92MHz, this stylish and compact remote has a range of up to 750 feet when combined with an LR, KH3 or LT Series module. The Keyfob can be configured with 1 to 5 buttons and the keypad and labeling can be modified to meet specific customer requirements. Selectable addressing provides security and allows the creation of up to 1,022 distinct transmitter-receiver relationships. The Keyfob is available in black, white, or translucent colors. The transmission can be decoded using a matching KH3 Series receiver / decoder, or an LR or LT Series receiver paired with a decoder IC or microcontroller. The unit operates from a single 3V CR2032 lithium button cell. S4 S1 S5 S3 2.23"

S2 1.37"

0.45"

Figure 1: Package Dimensions Figure 2: Keyfob Button Configurations OEM Configurations With a one-time NRE and minimum order, Linx can configure the keypad and label areas. Contact Linx for details. Features FCC, IC and CE pre-certified Long range Applications General remote control Keyless entry Garage / gate openers 1 to 5 buttons Compact, stylish package Lighting control Home / industrial automation Wire elimination 1 Revised 9/8/14 Ordering Information Ordering Information Part Number Description OTX-***-HH-KF#-HT-xxx HT Keyfob Transmitter EVAL-***-HH-KF#-HT HT Keyfob Evaluation Kit

*** = 315, 418 (Standard) or 433.92MHz xxx = Color (Leave blank for standard black) WHT = White CRE = Red CGY = Gray Figure 3: Ordering Information Electrical Specifications Keyfob Electrical Specifications Designation Min. Typ. Max. Units Notes 2.1 3.0 3.4 5.0 3.6 VDC mA nA 1 VCC lCC lPDN FC 315 418 433.92 9,600 MHz MHz MHz kHz bps 40

+85 C 1 Parameter Power Supply Operating Voltage Supply Current Power-Down Current Transmitter Section Transmit Frequency Range OTX-315-HH-KF#-HT OTX-418-HH-KF#-HT OTX-433-HH-KF#-HT Data Rate Environmental Operating Temperature Range 1. Characterized, but not tested Figure 4: Electrical Specifications Center Frequency Accuracy 50

+50 Theory of Operation The HT Series Keyfob Transmitter combines a high-performance synthesized transmitter with an on-board encoder IC to form a highly reliable, yet cost-effective RF remote control transmitter. The transmitters synthesized architecture delivers outstanding stability and frequency accuracy while minimizing the effects of temperature, antenna port loading and mismatching. This reduces or eliminates frequency pulling, bit contraction, and other negative effects common to SAW-based transmitter architectures, providing a significantly higher level of performance and reliability. When a button is pressed on the Keyfob, power is applied to the internal circuitry and the encoder IC is enabled. The encoder detects the logic states of the address lines and button data lines. These states are formatted into a three-word transmission cycle that continues until the button is released. The encoder data is used to modulate the transmitter, which, through the antenna, conveys the data into free space. On the receiver side, a decoder IC or custom microcontroller is used to check the transmitters address bits against the address settings of the receiving device. If a match is confirmed, the decoders outputs are set to replicate the transmitters button states. These outputs can then be used to activate external circuitry required by the application. The transmitter is compatible with several Linx receiver products, including the LR, KH3, LT, and OEM product families. Ranges of up to 750 feet are possible when the transmitter is combined with the receiver and a good antenna. Applications operating over shorter distances will also benefit from the increased link reliability and superior noise immunity provided by the LR Series receiver. The DS Series encoder inside the Keyfob transmitter uses a protocol based on the Holtek HT640 encoder. It is completely backwards compatible with older generation transmitters (CMD-KEY#-*** part numbers) and systems based on the HT658 decoder. 2 3 Contention Considerations It is important to understand that only one transmitter at a time can be activated within a reception area. While the transmitted signal consists of encoded digital data, only one carrier of any particular frequency can occupy airspace without contention at any given time. If two transmitters are activated in the same area at the same time, then the signals will interfere with each other and the decoder will not see a valid transmission, so it will not take any action. Battery Replacement The transmitter utilizes a standard CR2032 lithium button cell. In normal use, it provides 1 to 2 years of operation. Access for replacement is accomplished by gently prying apart the two halves of the Keyfob at the seam (fingernails or a coin will do). Once the unit is open, remove the battery by sliding it out from beneath the retainer. Battery There may be the risk of explosion if the battery is replaced by the wrong type. Replace it with the same type of battery while observing the polarity shown in Figure 7. Assembly Diagram Figure 7: Battery Access Setting the Transmitter Address The Keyfob allows the selection of one of 1,022 unique addresses. All keyfobs are supplied set to the same address. The address can be changed to avoid contention with other units or to create unique relationships. This is accomplished by cutting the traces. The traces are accessed by removing the rear cover. Figure 5: Address Traces If the trace is intact, the address line is connected to ground, otherwise it is floating. The receivers address must match exactly in order for the units to communicate. Application Note AN-00300 describes in detail how to set the address to match any of the receivers offered by Linx. This note can be found in the Support section of the Linx website, www.linxtechnologies.com. Note: Leaving all of the traces intact or all of them cut are not valid addresses. At least one trace must be different from the rest. Button Assignments The Keyfob is available in five button configurations. Those configurations and the corresponding switch numbers are shown in Figure 6. The table shows which encoder data line has been assigned to each switch. When a button is pressed, the data line goes high, causing the corresponding data line on the decoder to go high if the address has been learned. S5 S4 S2 S4 S5 S2 S4 S1 S3 S2 S4 S1 S5 S3 S2 Button Data Line S1 S2 S3 S4 S5 D0 D1 D2 D3 D4 Figure 6: OTX-***-HH-KF#-MS Button Assignments Figure 8: OTX-***-HH-KF#-MS Assembly 4 5 Labeling / Instruction Requirements The transmitter has been pre-certified for FCC Part 15 and Industry Canada license-exempt RSS standards for an intentional radiator. The 433.92MHz version has also been tested for CE compliance for use in the European Union. The 315MHz and 418MHz versions are not legal for use in Europe. It has already been labeled in accordance with FCC, Industry Canada and CE regulations. No further labeling of the unit is needed; however, it is necessary to include the following statement in the end products instruction manual or insert card. EU does not require a statement. INSTRUCTION TO THE USER This device complies with Part 15 of the FCC Rules and Industry Canada license-

exempt RSS standard(s). Operation of this device is subject to the following two conditions:

1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Connect the equipment into an outlet on a circuit different from that to which the Increase the separation between the equipment and receiver. receiver is connected. Consult the dealer or an experienced radio / TV technician for help. The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the users authority to operate this equipment. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 6 7 Receivers There are four options for receivers within the Linx product line. The first option is to use one of the OEM Function Modules, such as the Relay Module. These items are also pre-certified and can be immediately included in a product. The other options are to use one of the Linx receiver modules. The signal sent by the Keyfob transmitter can be received by the LR Series receiver module or the LT Series transceiver module. These modules can be connected to the DS Series decoder to decode the signal, or a custom microcontroller can be programmed to decode it and take specific action. The KH3 Series offers a slightly simpler solution by combining the LR Series receiver and the DS Series decoder in a single package. This receiver only supports the Holtek protocol, not the serial protocol. Figure 9: Linx Receivers When a button is pressed on the transmitter, a corresponding line on the decoder goes high (as long as the addresses match). This can then be connected to whatever circuitry is required by the application. Application Note AN-00300 discusses in detail how to set the addresses on all of the units. Data guides for all of the receivers and the DS Series decoder can be found on the Linx website, www.linxtechnologies.com. Typical Applications Figure 10 shows a typical schematic using the LR Series receiver and the DS Series decoder. ANTENNA GND GND VCC 1 2 3 4 5 6 7 8 NC NC NC GND VCC PDN RSSI DATA ANT GND NC NC NC NC NC NC 16 15 14 13 12 11 10 9 RXM-xxx-LR VCC VT VCC GND P_SEL D0 D1 D2 D3 D4 D5 GND D6 D7 E/D_SEL D_CFG A_CFG0 A_CFG1 VT/DO TE/DI A9 A8 A7 A6 A5 A4 VCC GND A3 A2 A1 A0 LICAL-EDC-DS001 28 27 26 25 24 23 22 21 20 19 18 17 16 15 100k 100k 100k 100k 100k 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND Serial VCC Holtek GND D0 D1 D2 D3 D4 D5 GND D6 D7 GND GND GND VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 100k 100k 100k 100k 100k VCC Figure 10: LR Receiver and DS Decoder Schematic The decoder has ten address lines that must match the transmitter address lines. A DIP switch is commonly used to set these, but they can also be hardwired. As long as the address lines match, when a button on the transmitter is pressed, a corresponding data line on the decoder (D0D7) goes high. These data lines can then be connected to external circuitry to perform whatever function is required by the application. 8 9 Resources Notes Support For technical support, product documentation, application notes, regulatory guidelines and software updates, visit www.linxtechnologies.com RF Design Services For customers who need help implementing Linx modules, Linx offers design services including board layout assistance, programming, certification advice and packaging design. For more complex RF solutions, Apex Wireless, a division of Linx Technologies, creates optimized designs with RF components and firmware selected for the customers application. Call +1 800 736 6677 (+1 541 471 6256 if outside the United States) for more information. Antenna Factor Antennas Linxs Antenna Factor division has the industrys broadest selection of antennas for a wide variety of applications. For customers with specialized needs, custom antennas and design services are available along with simulations of antenna performance to speed development. Learn more at www.linxtechnologies.com. by 10 11 Linx Technologies 159 Ort Lane Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com Disclaimer Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. Typical parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any specific application. It is Customers responsibility to verify the suitability of the part for the intended application. At Customers request, Linx Technologies may provide advice and assistance in designing systems and remote control devices that employ Linx Technologies RF products, but responsibility for the ultimate design and use of any such systems and devices remains entirely with Customer and/or user of the RF products. LINX TECHNOLOGIES DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY CUSTOMERS OR USERS INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. CUSTOMER AND/OR USER ASSUME ALL RISKS OF DEATH, BODILY INJURIES, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS, INCLUDING WITH RESPECT TO ANY SERVICES PROVIDED BY LINX RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS. LINX TECHNOLOGIES SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR A CUSTOMERS, USERS, OR OTHER PERSONS DEATH, BODILY INJURY, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS. The limitations on Linx Technologies liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. 2014 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, CipherLinx, WiSE and the stylized CL logo are trademarks of Linx Technologies.

MS Keyfob Transmitter Data Guide Table of Contents 1 Description 1 Features 1 Applications 1 OEM Configurations 2 Ordering Information 2 Electrical Specifications 3 Theory of Operation 4 Setting the Transmitter Address 4 Button Assignments 5 Contention Considerations 5 Battery Replacement 5 Assembly Diagram 6 Compliance Requirements 6 Labeling / Instruction Requirements 8 Typical Applications 10 Resources 11 Notes

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Warning: Some customers may want Linx radio frequency (RF) products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (Life and Property Safety Situations). NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module should be modified for Life and Property Safety Situations. Such modification cannot provide sufficient safety and will void the products regulatory certification and warranty. Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application. Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/

decoder to validate the data. Without validation, any signal from another unrelated transmitter in the environment received by the module could inadvertently trigger the action. All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping implemented are more subject to interference. This module does not have a frequency hopping protocol built in. Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could cause product failure which is not immediately evident. Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications and may cause product failure which is not immediately evident. MS Keyfob Transmitter Data Guide S5 S3 S1 S2 S4 1.37"

0.45"

1.00"

2.23"

Figure 1: Package Dimensions Description The Linx MS Series Keyfob transmitter is ideal for remote control and command applications. Available in 315, 418

(standard) or 433.92MHz versions, it has been pre-certified for FCC Part 15, Industry Canada, and European CE

(433MHz) compliance. This dramatically reduces development cost and time to market. The high-performance synthesized design provides superior frequency accuracy and minimizes body proximity effects. When combined with an LR or LT Series module, the Keyfob can operate at distances of up to 750 feet. Ease of use and security are dramatically Figure 2: Keyfob Button Configurations enhanced by the on-board MS Series OEM Configurations encoder, which allows instant creation of With a one-time NRE and up to 16,777,216 (224) unique addresses minimum order, Linx can without cumbersome DIP switches configure the keypad and label or cut traces. When paired with a MS areas. Contact Linx for details. Series decoder, Keyfob identity can be determined and button permissions established. The Keyfob is available with 1 to 5 buttons and can be custom labeled Features FCC, IC and CE pre-certified Long range Simple user setup Applications General remote control Keyless entry Garage / gate openers 224 unique addresses 1 to 5 buttons Compact, stylish package Lighting control Home / industrial automation Wire elimination 1 Revised 9/8/14 Ordering Information Ordering Information Part Number Description OTX-***-HH-KF#-MS-xxx MS Keyfob Transmitter MDEV-***-HH-KF#-MS MS Keyfob Development System

*** = 315, 418 (Standard) or 433.92MHz xxx = Color (Leave blank for standard black) WHT = White CRE = Red CGY = Gray Figure 3: Ordering Information Electrical Specifications Keyfob Electrical Specifications Designation Min. Typ. Max. Units Notes 2.1 3.0 3.4 5.0 3.6 VDC mA nA 1 VCC lCC lPDN FC 315 418 433.92 9,600 MHz MHz MHz kHz bps 40

+85 C 1 Parameter Power Supply Operating Voltage Supply Current Power-Down Current Transmitter Section Transmit Frequency Range OTX-315-HH-KF#-MS OTX-418-HH-KF#-MS OTX-433-HH-KF#-MS Data Rate Environmental Operating Temperature Range 1. Characterized, but not tested Figure 4: Electrical Specifications Center Frequency Accuracy 50

+50 Theory of Operation The MS Series Keyfob Transmitter combines a high-performance synthesized transmitter with an on-board MS Series encoder IC to form a highly reliable, yet cost-effective RF remote control transmitter. The transmitters advanced synthesized architecture delivers superior stability and frequency accuracy while minimizing the effects of temperature and body proximity. The advanced MS Series encoder has several advantages over previous solutions. It provides more security by offering 224 addresses, which is several orders of magnitude greater than older encoders. Furthermore, the address is instantly established with a simple button press, eliminating cumbersome DIP switches and cut traces. When paired with a MS Series decoder, keyfob identity can be determined and distinct transmitter-receiver relationships established. The Keyfob operates in the following manner: when a button is pressed on the Keyfob, power is applied to the internal circuitry and the encoder IC is enabled. The encoder then detects the logic states of the button data lines. The encoder data is used to modulate the transmitter, which, through the antenna, conveys the data into free space. The transmission cycle continues until the button is released. On the receiver side, an MS Series decoder IC is used to check the transmitters address bits against the address saved in memory. If a match is confirmed, and if the decoder has permission to recognize the specific button being pressed, the decoders outputs are set to replicate the transmitters button states. These outputs can then be used to activate external circuitry required by the application. The transmitter is compatible with the LT and LR product families. When the Keyfob transmitter is combined with an LR Series receiver and MS Series decoder, ranges of up to 750 feet are possible. Applications operating over shorter distances will also benefit from the increased link reliability and superior noise immunity provided by the LR receiver. 2 3 Setting the Transmitter Address The address is changed by using a paper clip or probe to press the CREATE_ADDR button on the board through the hole in the back of the case. When the button is depressed, an LED lights up in the MODE_IND window, indicating that the address is being created. The address is randomized for as long as the button is held down. When the button is released, the randomized address is saved and the LED begins flashing to indicate that the Control Permissions may now be set. Figure 5: CREATE_ADDR Button Access Press the buttons that the Keyfob user will have the authority to access. Press the CREATE_ADDR button with the paper clip again or wait 17 seconds for it to time out. The address and Control Permissions are now set. The decoder needs to learn the address before it accepts any transmissions. Please see the Typical Applications section of this data guide or the MS Series Decoder Data Guide for details. CREATE_ADDR Button Access Button Assignments The Keyfob is available in five button configurations. Those configurations and the corresponding switch numbers are shown in Figure 6. The table shows which encoder data line has been assigned to each switch. When a button is pressed, the data line goes high, causing the corresponding data line on the decoder to go high if the address has been learned. Contention Considerations It is important to understand that only one transmitter at a time can be activated within a reception area. While the transmitted signal consists of encoded digital data, only one carrier of any particular frequency can occupy airspace without contention at any given time. If two transmitters are activated in the same area at the same time, then the signals will interfere with each other and the decoder will not see a valid transmission, so it will not take any action. Battery Replacement The transmitter utilizes a standard CR2032 lithium button cell. In normal use, it provides 1 to 2 years of operation. Access for replacement is accomplished by gently prying apart the two halves of the Keyfob at the seam (fingernails or a coin will do). Once the unit is open, remove the battery by sliding it out from beneath the retainer. Battery There may be the risk of explosion if the battery is replaced by the wrong type. Replace it with the same type of battery while observing the polarity shown in Figure 7. Assembly Diagram Figure 7: Battery Access S5 S4 S2 S4 S5 S2 Button Data Line S1 S2 S3 S4 S5 D0 D1 D2 D3 D4 S4 S1 S3 S2 S4 S1 S5 S3 S2 Figure 6: OTX-***-HH-KF#-MS Button Assignments 4 Figure 8: OTX-***-HH-KF#-MS Assembly 5 Labeling / Instruction Requirements The transmitter has been pre-certified for FCC Part 15 and Industry Canada license-exempt RSS standards for an intentional radiator. The 433.92MHz version has also been tested for CE compliance for use in the European Union. The 315MHz and 418MHz versions are not legal for use in Europe. It has already been labeled in accordance with FCC, Industry Canada and CE regulations. No further labeling of the unit is needed; however, it is necessary to include the following statement in the end products instruction manual or insert card. EU does not require a statement. INSTRUCTION TO THE USER This device complies with Part 15 of the FCC Rules and Industry Canada license-

exempt RSS standard(s). Operation of this device is subject to the following two conditions:

1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Connect the equipment into an outlet on a circuit different from that to which the Increase the separation between the equipment and receiver. receiver is connected. Consult the dealer or an experienced radio / TV technician for help. The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the users authority to operate this equipment. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 6 7 Typical Applications The signal sent by the Keyfob transmitter can be received by the LR Series receiver module or the LT Series transceiver module. The receiver module is connected directly to the MS Series decoder, which decodes the transmitted signal. When a button is pressed on the transmitter, a corresponding line on the decoder goes high. This can then be connected to external circuitry to perform whatever function is required by the application. The decoder must learn the transmitters address before they can work together. This is done by taking the LEARN line on the decoder high, typically with a Figure 9: Linx RF Modules pushbutton. The MODE_IND line starts switching (if an LED is attached, this causes it to flash) indicating that the decoder is in Learn Mode. Press any of the buttons on the transmitter to initiate a transmission. Take the LEARN line high again to exit Learn Mode and the system is ready for use. Figure 10 shows a schematic for a typical application. The Keyfob is set to 9,600bps, so SEL_BAUD0 should be tied high and SEL_BAUD1 tied low. The decoder has several unique features, such as Latch Mode, Receiver Control and TX_ID. If the LATCH line is tied to VCC, the outputs go high on the first transmission, then low on the second. It is shown tied low, so the outputs are momentary (high for as long as a signal is received instructing the decoder to make them high). The RX_CNTL line can be connected to the PDN line of the receiver and the decoder activates the receiver with a 10% duty cycle This greatly reduces the average current consumption of the system. The adjacent figure shows it tied to ground, but to use this feature, connect the RX_ CNTL line of the decoder directly to the receivers PDN line. The TX_ID line outputs a number associated with the originating transmitter

/ encoder. Application Note AN-00156 shows how to use this feature. Data guides for the modules, the MS encoder, and the MS decoder can be found on the Linx Technologies website. VCC GND 1 2 3 4 5 6 7 8 NC NC NC GND VCC PDN RSSI DATA RXM-LR VCC 220 1 2 3 4 5 6 7 8 9 10 D6 D7 SEL_BAUD0 SEL_BAUD1 GND GND LATCH RX_CNTL TX_ID MODE_IND GND LICAL-DEC-MS001 16 15 14 13 12 11 10 9 ANT GND NC NC NC NC NC NC GND D5 D4 D3 D2 VCC VCC D1 D0 DATA_IN LEARN 20 19 18 17 16 15 14 13 12 11 GND VCC Figure 10: LR Receiver and MS Decoder Schematic 8 9 Resources Notes Support For technical support, product documentation, application notes, regulatory guidelines and software updates, visit www.linxtechnologies.com RF Design Services For customers who need help implementing Linx modules, Linx offers design services including board layout assistance, programming, certification advice and packaging design. For more complex RF solutions, Apex Wireless, a division of Linx Technologies, creates optimized designs with RF components and firmware selected for the customers application. Call +1 800 736 6677 (+1 541 471 6256 if outside the United States) for more information. Antenna Factor Antennas Linxs Antenna Factor division has the industrys broadest selection of antennas for a wide variety of applications. For customers with specialized needs, custom antennas and design services are available along with simulations of antenna performance to speed development. Learn more at www.linxtechnologies.com. by 10 11 Linx Technologies 159 Ort Lane Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com Disclaimer Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. Typical parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any specific application. It is Customers responsibility to verify the suitability of the part for the intended application. At Customers request, Linx Technologies may provide advice and assistance in designing systems and remote control devices that employ Linx Technologies RF products, but responsibility for the ultimate design and use of any such systems and devices remains entirely with Customer and/or user of the RF products. LINX TECHNOLOGIES DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY CUSTOMERS OR USERS INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. CUSTOMER AND/OR USER ASSUME ALL RISKS OF DEATH, BODILY INJURIES, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS, INCLUDING WITH RESPECT TO ANY SERVICES PROVIDED BY LINX RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS. LINX TECHNOLOGIES SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR A CUSTOMERS, USERS, OR OTHER PERSONS DEATH, BODILY INJURY, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS. The limitations on Linx Technologies liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. 2014 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, CipherLinx, WiSE and the stylized CL logo are trademarks of Linx Technologies.

SI Keyfob Transmitter Data Guide Table of Contents 1 Description 1 Features 1 Applications 1 OEM Configurations 2 Ordering Information 2 Electrical Specifications 3 Theory of Operation 4 Setting the Transmitter Address 4 Button Assignments 5 Contention Considerations 5 Battery Replacement 5 Assembly Diagram 6 Compliance Requirements 6 Labeling / Instruction Requirements 8 Typical Applications 10 Resources 11 Notes

!

Warning: Some customers may want Linx radio frequency (RF) products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (Life and Property Safety Situations). NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module should be modified for Life and Property Safety Situations. Such modification cannot provide sufficient safety and will void the products regulatory certification and warranty. Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application. Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/

decoder to validate the data. Without validation, any signal from another unrelated transmitter in the environment received by the module could inadvertently trigger the action. All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping implemented are more subject to interference. This module does not have a frequency hopping protocol built in. Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reflow temperature profile could cause product failure which is not immediately evident. Do not make any physical or electrical modifications to any Linx product. This will void the warranty and regulatory and UL certifications and may cause product failure which is not immediately evident. SI Keyfob Transmitter Data Guide 1.00"

Description The Linx SI Series Keyfob transmitter is ideal for remote control and command applications. Available in 418 (standard) or 433.92MHz versions, it has been pre-certified for FCC Part 15, Industry Canada, and European CE (433MHz) compliance. This dramatically reduces development cost and time to market. The high-performance synthesized design provides superior frequency accuracy and minimizes body proximity effects. When combined with a Silicon Labs Si4355 receiver, the Keyfob can operate at distances of up to 1000 feet. Ease of use and security are dramatically enhanced by the use of Silicon Labs Ember One-Way Link protocol with AES-128 encryption. The Keyfob is available with 1 to 5 buttons and can be custom labeled. Features FCC, IC and CE pre-certified Long range Simple user setup Applications General remote control Keyless entry Garage / gate openers Lighting control Home / industrial automation Wire elimination S4 S1 S5 S3 2.23"

S2 1.37"

0.45"

Figure 1: Package Dimensions Figure 2: Keyfob Button Configurations OEM Configurations With a one-time NRE and minimum order, Linx can configure the keypad and label areas. Contact Linx for details. Factory preset unique address 1 to 5 buttons Compact, stylish package 1 Revised 10/16/14 Theory of Operation The SI Series Keyfob Transmitter combines a high-performance synthesized SoC transmitter with an on-board microcontroller input interpretation. The transmitters advanced synthesized architecture delivers superior stability and frequency accuracy while minimizing the effects of temperature and body proximity. The Keyfob operates in the following manner: when a button is pressed on the Keyfob, the transmitter and microcontroller are woken from sleep mode. The microcontroller detects the logic states of the button data lines. The button data line logic states are sent from the microcontroller to the transmitter as a serial data packet. The transmitter SoC generates a 42-byte encrypted packet and transmits a three-packet burst for each button press throught the antenna and into fre space. On the receiver side, a Si4355 checks the preamble, the sync bytes and the CRC of the transmitted packet. If the packet is OK the receiver responds to the button logic state data in the manner programmed into the receiver by the end user. The transmitter is compatible with the Silicon Labs Si4355 receivers using the Silicon Labs Ember One-Way Link protocol. Ordering Information Ordering Information Part Number Description OTX-***-HH-KF#-SI-xxx SI Keyfob Transmitter MDEV-***-HH-KF#-SI SI Keyfob Development System

*** = 418 (Standard) or 433.92MHz xxx = Color (Leave blank for standard black) WHT = White CRE = Red CGY = Gray Figure 3: Ordering Information Electrical Specifications Keyfob Electrical Specifications Designation Min. Typ. Max. Units Notes 2.1 3.0 3.4 5.0 3.6 VDC mA nA 1 VCC lCC lPDN FC 418 433.92 2FSK 59.05 9,600 MHz MHz kHz kHz bps Parameter Power Supply Operating Voltage Supply Current Power-Down Current Transmitter Section Transmit Frequency Range OTX-418-HH-KF#-SI OTX-433-HH-KF#-SI OTA Modulation Frequency Deviation Data Rate Environmental Operating Temperature Range 1. Characterized, but not tested Figure 4: Electrical Specifications Center Frequency Accuracy 50

+50 40

+85 C 1 2 3 Transmitter Address The unique address for each unit is preprogrammed in the Silicon Labs radio IC during manufacturing and cannot be changed or modified by the end user. A 16-byte pairing key is programmed into the transmitter at the factory and is shared with the associated receiver during the pairing process. Button Assignments The Keyfob is available in five button configurations. Those configurations and the corresponding switch numbers are shown in Figure 5. The table shows which encoder data line has been assigned to each switch. When a button is pressed, the data line goes high, causing the corresponding data line on the decoder to go high if the address has been learned. S5 S4 S2 S4 S5 S2 Button Data Line S1 S2 S3 S4 S5 D0 D1 D2 D3 D4 S4 S1 S3 S2 S4 S1 S5 S3 S2 Figure 5: OTX-***-HH-KF#-MS Button Assignments 4 Contention Considerations It is important to understand that only one transmitter at a time can be activated within a reception area. While the transmitted signal consists of encoded digital data, only one carrier of any particular frequency can occupy airspace without contention at any given time. If two transmitters are activated in the same area at the same time, then the signals will interfere with each other and the decoder will not see a valid transmission, so it will not take any action. Battery Replacement The transmitter utilizes a standard CR2032 lithium button cell. In normal use, it provides 1 to 2 years of operation. Access for replacement is accomplished by gently prying apart the two halves of the Keyfob at the seam (fingernails or a coin will do). Once the unit is open, remove the battery by sliding it out from beneath the retainer. Battery There may be the risk of explosion if the battery is replaced by the wrong type. Replace it with the same type of battery while observing the polarity shown in Figure 6. Assembly Diagram Figure 6: Battery Access Figure 7: OTX-***-HH-KF#-MS Assembly 5 Labeling / Instruction Requirements The transmitter has been pre-certified for FCC Part 15 and Industry Canada license-exempt RSS standards for an intentional radiator. The 433.92MHz version has also been tested for CE compliance for use in the European Union. The 418MHz version is not legal for use in Europe. It has already been labeled in accordance with FCC, Industry Canada and CE regulations. No further labeling of the unit is needed; however, it is necessary to include the following statement in the end products instruction manual or insert card. EU does not require a statement. INSTRUCTION TO THE USER This device complies with Part 15 of the FCC Rules and Industry Canada license-

exempt RSS standard(s). Operation of this device is subject to the following two conditions:

1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Connect the equipment into an outlet on a circuit different from that to which the Increase the separation between the equipment and receiver. receiver is connected. Consult the dealer or an experienced radio / TV technician for help. The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the users authority to operate this equipment. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 6 7 Resources Notes Support For technical support, product documentation, application notes, regulatory guidelines and software updates, visit www.linxtechnologies.com RF Design Services For customers who need help implementing Linx modules, Linx offers design services including board layout assistance, programming, certification advice and packaging design. For more complex RF solutions, Apex Wireless, a division of Linx Technologies, creates optimized designs with RF components and firmware selected for the customers application. Call +1 800 736 6677 (+1 541 471 6256 if outside the United States) for more information. Antenna Factor Antennas Linxs Antenna Factor division has the industrys broadest selection of antennas for a wide variety of applications. For customers with specialized needs, custom antennas and design services are available along with simulations of antenna performance to speed development. Learn more at www.linxtechnologies.com. by 8 9 Linx Technologies 159 Ort Lane Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com Disclaimer Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. Typical parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any specific application. It is Customers responsibility to verify the suitability of the part for the intended application. At Customers request, Linx Technologies may provide advice and assistance in designing systems and remote control devices that employ Linx Technologies RF products, but responsibility for the ultimate design and use of any such systems and devices remains entirely with Customer and/or user of the RF products. LINX TECHNOLOGIES DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY CUSTOMERS OR USERS INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. CUSTOMER AND/OR USER ASSUME ALL RISKS OF DEATH, BODILY INJURIES, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS, INCLUDING WITH RESPECT TO ANY SERVICES PROVIDED BY LINX RELATED TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS. LINX TECHNOLOGIES SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR A CUSTOMERS, USERS, OR OTHER PERSONS DEATH, BODILY INJURY, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS. The limitations on Linx Technologies liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. 2014 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, CipherLinx, WiSE and the stylized CL logo are trademarks of Linx Technologies.