FCC ID: 2AL6KBL-M7668BU4 IEEE 802.11a/b/g/n/ac 2T2R USB WiFi+Bluetooth 5.0 Module

BL-M7668BU4 IEEE 802.11a/b/g/n/ac 2T2R USB WiFi Module Integrated Bluetooth 2.1+EDR/4.2/5.0 Features 3. Reserving System IEEE Std. 802.11a IEEE Std. 802.11b IEEE Std. 802.11g IEEE Std. 802.11n IEEE Std. 802.11ac Bluetooth 2.1+EDR/4.2/5.0 4. Chip Solution Mediatek MT7668BUN 5. Size 33.0mm x70.0mm x 6.0mm ShenZhen Bilian Electronic Co.,Ltd. PDF pdfFactory Pro www.fineprint.cn IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 1. Introduction BL-M7668BU4 module design is based on Mediatek MT7668BUN solution, The MT7668BUN is a highly integrated single chip which has built in a 2x2 dual-band wireless LAN radio and Bluetooth radio. It includes Bluetooth EDR and LE radio which complies with Bluetooth v2.1+EDR, v4.2, and v5.0. The Module is a highly integrated MAC/BBP and 2.4/5GHz PA/LNA single chip which supports a 866.7Mbps PHY rate. The Module is designed to support standard-based features in the areas of security, quality of service, and international regulations, giving end users the greatest performance anytime and in any circumstance. This documentation describes the engineering requirements specification. RF module Overview The general HW architecture for the module is shown in Figure 1. This WLAN Module design is based on Mediatek MT7668BUN. It is a highly integrated single-chip MIMO(Multiple In Multiple Out) Wirele ss LAN (WLAN) network interface controller complying with the 802.11 specification and Bluetooth ove r USB interface. It combines a MAC, a 2T2R capable baseband, and RF in a single chip. An intelligent Wi-

Fi/Bluetooth coexistence algorithm is implemented to provide the best harmonized Wi-Fi and Bluetooth radio performance. 5V 1.5V 1.2V Internal DC/DC USB2.0 Interface Internal LDO WF_ RFIO 2.4G TX0/RX0 5G TX0/RX0 Dixplexer Antenna0 2.4G TX1/RX1 WF_ RFIO 5G TX1/RX1 Dixplexer Antenna1 40MHz BT_ RFIO 2.4G TX2/RX2 Filter Filter Antenna2 Figure 1 BL-M7668BU4 Block Diagram PDF pdfFactory Pro www.fineprint.cn page 4 of 18 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Specification reference This specification is based on additional references listed below. _ IEEE Std. 802.11a _ IEEE Std. 802.11b _ IEEE Std. 802.11g _ IEEE Std. 802.11n _ IEEE Std. 802.11ac _ Bluetooth 2.1+EDR/4.2/5.0 System Functions Table1: General Specification as below:

Main Chipset Operating Frequency WiFi Standard Bluetooth Modulation Mediatek MT7668BUN 2.4G/5G 802.11a/b/g/n/ac (2x2) 2.1+EDR/4.2/5.0 WIFI:11b: DBPSK, DQPSK and CCK and DSSS 11a/g: BPSK, QPSK, 16QAM, 64QAM and OFDM 11n: BPSK, QPSK, 16QAM, 64QAM and OFDM 11ac: BPSK, QPSK, 16QAM, 64QAM,256QAM and OFDM Bluetooth: GFSK, /4-DQPSK and 8-DPSK Data rates Form factor Host Interface PCB Stack Dimension Antenna Operation Temperature Storage Temperature Operation Voltage 11b: 1, 2, 5.5 and 11Mbps 11a/g: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps 11n: MCS0~15, up to 300Mbps 11ac: MCS0~9, Nss=2, up to 866.7Mbps 10pins , USB 2.0 4-layers design Typical33mm x 70mm x 6.0mm Internal Antennas Design

-20 to +70

-40 to +125 5V +/-5%

PDF pdfFactory Pro www.fineprint.cn page 5 of 18 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 2. Mechanical Specification Mechanical Outline Drawing Typical Dimension (W x L ): 33.0mmx 70.0mm x 6.0mm General tolerance: 0.3mm Product Picture PDF pdfFactory Pro www.fineprint.cn page 6 of 18 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Pin define SCH W F1 G Band Chi p out M at chi ng W F1 A Band Chi WF1_RFIO_G WF1_RFIO_G WF1_RFIO_A WF1_RFIO_A

[2]

[2]

50 Ohm 50 WF1_RF_5G_TRX WF1_RF_2G_TRX C28 1.6nH C0201 C21 0 ohm C0201 L11 NI L0201 L6 NI / 4.3nH L0201 L7 NI L0201 L12 NI L0201 BT M at chi ng RFIP_BT

[2]

50 Ohm RFIP_BT L4 1.3nH L0201 C14 0.9pF C0201 C15 2.7nH C0201 BT_TRX L5 1.5nH L0201 C L _ T B C16 0.5pF C0201 W F0 G Band WF0_RFIO_G

[2]

50 Ohm WF0_LNA_EXT_G WF0_LNA_EXTG L13 NI L0201 L14 NI L0201 WF0_LNA_EXT_G

[2]

WF0_RFIO_G 50 Ohm L15 NI L0201 L16 NI L0201 C53 1nH C0201 WF0_RF_2G_TRX C49 2.2nH C0201 C50 0.8nH C0201 W F0 A Band Chi WF0_RFIO_A WF0_RFIO_A WF0_RF_5G_TRX

[2]

50 C43 0 ohm C0201 L8 NI / 4.3nH L0201 L9 NI L0201 WF Front - end W F0_RF_5G_TRX 3 X 1 2 WF0_RF_2G_TR U1 TR_5 G G RFIN TR_2 G 4 5 6 DP1608-A2455DTA2 DP0_OUT CON1 ANT IN D N G D N G R9 1.4nH R0201 C67 0.3pF C0201 R10 1.4nH R0201 C69 0.3pF C0201 C66 NI C0201 C68 NI C020 WF1_RF_5G_TRX U3 4 5 6 TR_5 G G RFIN TR_2 G 3 1 2 DP1608-A2455DTA2 DP1_OUT CON2 ANT IN D N G D N G BT C7 0 ohm C0201 BT_TRX BT_RF IN CON3 ANT C163 NI C0201 C164 NI C0201 PDF pdfFactory Pro www.fineprint.cn page 7 of 18 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 Buck_1V3_OU T IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Function : 1. 2. 3. 4. GPIO0

=3DVsync BGF_INT_B =

WIFI_INT_B =

PMU_EN =

WOBLE WOWLAN RESET#

C128 10pF C0201 Pin 64 Pin 63 WF1AFE_1V3_IN AVDD13_RXFE_BT C61 0.1uF C0402 3.3V Pin 61 BT_3V3_IN C40 NI / 10pF C0201 C32 1uF C0402 AV DD22 Pin 59 C166 100pF C0201 Buck_1V3_OU T DV DD11 C51 1uF C0402 Pin 68 DVDD_1V1_IN TP24TP23TP22TP21 E K A W _ T S O H _ T B 6 7 C N Y S _ D 3 5 7 D1 X T _ T R A U 4 7 D1 X R _ T R A U 3 7 1 T U O _ M C P 2 7 I 1 N _ M C P 1 7 V 3 3

. 0 7 T B _ P F R I T B _ P F R I 2 6 N _ T S R 0 6 AV DD18 DV DD11 AV DD18 C59 NI / 0.1uF C0201 C48 NI / 1uF C0201 C58 0.1uF C0402 Pin 10 USB_1V8_IN Pi n 7 Pi n 4 SSUSB_1V1_IN SSUSB_1V8_IN WIFI_HOST_WA KE (LOW ACTIV E ) 1 WIFI_INT_B U6 MT7668A U 7 7 D A P E 9 6 8 6 7 6 6 6 5 6 4 6 3 6 1 6 9 5 8 5 I B _ T N _ F G B I 0 O P G D X T _ T R A U D X R _ T R A U T U O _ M C P I N _ M C P I O D D V D D D V D 0 T E D P 1 T E D P K L C _ M C P C N Y S _ M C P E F A _ 1 F W _ 3 1 D D V A T B _ E F X R _ 3 1 D D V A T B _ P F R I T B _ 3 3 D D V A B _ T S R S Y S 1 F W _ 2 2 D D V A X R T _ 1 F W _ 3 1 D D V A PCIE_CKRXN PC IE_CKRXP AV DD18_S SUS B SS US B_TXN SS US B_TXP AV DD10_S SUS B SS US B_RXN SS US B_RXP AVDD18_US B US B_DP US B_DM AVDD33_US B DVDD P MU_E N 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 19 AVDD25_V2P5NA AVDD33_BUCK LX 18 L X AV SS33_BUCK US B DP US BDM PM U_E N C24 0.1uF C0402 3.3V AVDD25_V2P5NA 16 C165 4.7uF C0603 Buck_1V3_OU T L10 1 2 C26 SP M25202R2MPCC 10uF C0603 3.3V C31 1uF C0402 Pin 13 USB_3V3_IN DV DD11 Pin 14 DVDD_1V1_IN 3.3V R32 10K-ohm R0201 C72 NI / 10pF C0201 3.3V Reset 3.3V C19 NI / 10pF C0201 R2 10K-ohm R0201 55 WF1_RFIO_G WF1_RFIO_G RST_N 3.3V 51 WF1_RFIO_A WF1_RFIO_A C71 2.2uF C0603 3.3V Pin 49 50 WF1A_TX_3V3 U7 1 4 2 2.5 3 E3SB40E00010DE C44 NI / 0.5pF C0201 XTA L XO USB 2. 0 Part Di f f 90 ohm

[4] USBDM

[4] USBDP USBDM USBDP Pin 58 C18 10nF C0201 GPIO1 OSC_E N WF 1_RFIO_G AV DD33_WF1_PA_G WF1_LNA_EXT_G WF1_LNA_EXT_A WF 1_RFIO_A AV DD33_WF1_A_P A AV DD33_WF1_A_TX AV DD33_WF0_PA_G WF 0_RFIO_G WF0_LNA_EXT_G WF0_LNA_EXT_A 45 AV DD33_WF0_A_P A AVDD33_WF0_A_TX 57 56 54 53 52 50 49 48 43 42 41 39 ANTS EL0 AN TS EL2 ANTSEL3 40 ANTS EL2 Buck_1V3_OU T C25 10nF C0201 47 WF0_RFIO_G 46 WF0_LNA_EXT_G WF0_RFIO_G WF0_LNA_EXT_G WF0_RFIO_A 44 WF0_RFIO_A WF 0_RFIO_A C42 10pF C0201 C39 10pF C0201 C140 NI / 10pF C0201 3.3V C41 10pF C0201 Pin 48 WF0G_PA_3V3 3.3V O D L C _ 3 1 D D V A 0 D L C _ 3 1 D D V A O D L C O D L C O D L Y H P F E R V I C S M _ 3 3 D D V A O D L A L E S T N A _ O D D V D I 1 L E S T N A D D V D E F A _ 0 F W _ 3 1 D D V A 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 0 3 1 3 2 3 4 3 7 3 8 3 C37 10pF C0201 Pin 42 WF0A_TX_3V3 C38 NI / 10pF C0201 C70 2.2uF C0603 Pin 43 WF0A_PA_3V3 R23 NI / 10K-ohm R0201 R26 NI / 10K-ohm R0201 ANTSEL2 UART_TXD 3.3V 3.3V X R T _ 0 F W _ 3 1 D D V A 0 F W _ 2 2 D D V A AVDD22 C167 100pF C0201 AV DD22 T U O _ O X O X 3 3 O X O X _ 2 2 D D V A 5 L E S T N A 4 L E S T N A 6 3 5 L E S T N A 1 TP20 f e R

2 L t u o p e e K C27 1uF C0402 Buck_1V3_OU T Pin 32 WF0AFE_1V3_IN C60 0.1uF C0402 DV DD11 Pin 30 DVDD_1V1_IN F E R V V 3

. 3 C46 1uF C0402 DV DD11 C45 2.2uF C0603 AVDD18 C47 1uF C0402 3.3V Pin 26 C30 4.7uF MISC_3V3_IN C0603 AV DD22 C52 1uF C0402 Pin 27 ALDO_2V2_Out VBUS VOUT Range 0.6V to Vin VIN Range 2.8V to 5.5V VBUS 4 5 VIN FB 3 LX 2 GND 1 EN L23 VSW 1 2 SPM25202R2MPCC R102 U8 BL R / 100k / 0402 / 1%

R0402 REG_FB C65 NI / 22pF C0402 Reset_Module (LOW ACTIVE) 3.3V 3.3V C63 4.7uF C0603 C64 4.7uF C0603 R5 R1 2 R6 R R / 82 / K / 0402 / 1%

R0402 R / 365 / K / 0402 / 1%

R0402 R101 R / NC / ohm / 0201 / 5%

Reset_Module (LOW ACTIVE) CON4 R109 WIFI_REG_ON R / 000 / ohm / 0201 / 5%

BT_HOST_WAKE 3 VCC(5V) R3 R / ohm / 0201 / 5%

VBUS R100 R / 0 / ohm / 0402 / 5%

4 U2D-

U2D+

R99 R / 0

/ ohm /

0402 /

10P 4 10P C C0201 C0201 1 2 5 6 7 8 9 DM DP GND GND 3D_SY NC Reset WLAN_DEV_WAKE 10 PMU_EN (LOW ACTIVE) WIFI_HOST_WAKE

(LOW ACTIVE) R / 10k / 0201 / 5%

R105 R106 R / NC/ ohm / 0201 / 5%

5

USBDM [3]

USBDP [3]

3.3V R / 10K/ ohm / 0201 / 5%

R107 R108 R / NC/ ohm / 0201 / 5%

3D_SY NC C66 NC C0402 USB_1.25mm_10pin R / 10K/ ohm / 0201 / 5%

R103 R104 R / NC/ ohm / 0201 / 5%

3.3V 3.3V PDF pdfFactory Pro www.fineprint.cn page 8 of 18 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Electrical Specification This Specification is based-on conductive DVT testing result. The extreme condition include overall temperature (0,+25,+40) and overall voltage (4.75V,5V,5.25V). IEEE 802.11b Section:

Items Specification Mode Channel Data rate DBPSK, DQPSK and CCK and DSSS Contents IEEE802.11b CH1 to CH13 1, 2, 5.5, 11Mbps 1. Power Levels(Calibrated) TX Characteristics Min. Typ. Max. Unit Remar k 2. Spectrum Mask @ Target Power 1) fc +/-11MHz to +/-22MHz 2) fc > +/-22MHz 3. Constellation Error(EVM) @ Target Power 1) 1Mbps 2) 2Mbps 3) 5.5Mbps 4) 11Mbps 4. Frequency Error RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) 1Mbps (FER 8%) 2) 2Mbps (FER 8%) 3) 5.5Mbps (FER 8%) 4) 11Mbps (FER 8%) 6. Maximum Input Level (FER 8%)

-15 Min.

-10

-20

Typ.

-30

-50

-10

-10

-10

-10 15 Max.

-83

-80

-79

-76

dBr dBr dB dB dB dB ppm Unit dBm dBm dBm dBm dBm PDF pdfFactory Pro www.fineprint.cn page 9 of 18 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 IEEE 802.11g/a Section:

Items Contents IEEE802.11g & IEEE802.11a BPSK, QPSK, 16QAM, 64QAM and OFDM CH1 to CH13 @

11g CH36 to CH165 6, 9, 12, 18, 24, 36, 48, 54Mbps TX Characteristics Min. Typ. Max. Unit Remar k 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power Specification Mode Channel Data rate 1. Power Levels 1) 6Mbps 2) 9Mbps 3) 12Mbps 4) 18Mbps 5) 24Mbps 6) 36Mbps 7) 48Mbps 8) 54Mbps 4. Frequency Error 1) IEEE802.11g 2) IEEE802.11a

-20

-30

-15

-15 Min.

-20

-28

-40

-5

-8

-10

-13

-16

-19

-22

-25

-82

-81

-79

-77

-74

-70

-66

-65

15 15 Max. dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm RX Characteristics Typ. 5. Minimum Input Level Sensitivity(each chain) 1) 6Mbps (PER 10%) 2) 9Mbps (PER 10%) 3) 12Mbps (PER 10%) 4) 18Mbps (PER 10%) 5) 24Mbps (PER 10%) 6) 36Mbps (PER 10%) 7) 48Mbps (PER 10%) 8) 54Mbps (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11g 2) IEEE802.11a PDF pdfFactory Pro www.fineprint.cn page 10 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 IEEE 802.11n HT20 Section:

Items Data rate (MCS index) MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 TX Characteristics Min. Typ. Unit Remark BPSK, QPSK, 16QAM, 64QAM and OFDM Contents IEEE802.11n HT20 @

2.4G IEEE802.11n CH1 to CH13 @

2.4G CH36 to Max. Specification Mode Channel 1. Power Levels 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G

-20

-30

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-82

-79

-77

-74

-70

-66

-65

-64

dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm

-15

-15 Min.

Typ. 15 15 Max. PDF pdfFactory Pro www.fineprint.cn page 11 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 IEEE 802.11n HT40 Section:

Items Specification Mode Channel BPSK, QPSK, 16QAM, 64QAM and OFDM Contents IEEE802.11n HT20 @

2.4G IEEE802.11n CH3 to CH11 @

2.4G CH38 to Max. Data rate (MCS index) MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 TX Characteristics Min. Typ. Unit 1. Power Levels (Calibrated) Remar k 2. Spectrum Mask @ Target Power 1) at fc +/-21MHz 2) at fc +/-40MHz 3) at fc > +/-60MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level(PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G

-20

-30

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-79

-76

-74

-71

-67

-63

-62

-61

dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm

-15

-15 Min.

Typ. 15 15 Max. PDF pdfFactory Pro www.fineprint.cn page 12 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 BPSK, QPSK, 16QAM, 64QAM ,256QAM and OFDM Contents IEEE802.11ac CH36 to CH165 VHT20 CH38 to CH163 VHT40 CH42 MCS0/1/2/3/4/5/6/7/8/9 TX Characteristics Min. Typ. Max. Uni t Remar k IEEE 802.11ac Section:

Items Specification Mode Channel Data rate (MCS index) 1. Power Levels (Calibrated) 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz /20MHz/30MHz 2) at fc +/-21MHz /40MHz/60MHz 3) at fc +/-41MHz /80MHz/120MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 9) MCS8 10) MCS9 4. Frequency Error RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 9) MCS8 (PER 10%) 10) MCS9 (PER 10%) 6. Maximum Input Level(PER 10%)

-30

-15 Min.

Typ.

-20

-28

-40

-5

-10

-13

-16

-19

-22

-25

-27

-30

-32 15 Max. VHT4 0

-79

-76

-74

-71

-67

-63

-62

-61

-56

-54

VHT2 0

-82

-79

-77

-74

-70

-66

-65

-64

-59

-57 VHT8 0

-76

-73

-71

-68

-64

-60

-59

-58

-53

-51 dB r dB r dB r dB dB dB dB dB dB dB dB dB dB pp m Uni t dB m dB m dB m dB m dB m dB m dB m dB m dB m dB m dB m PDF pdfFactory Pro www.fineprint.cn page 13 of Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Bluetooth Section:

3.6.1BR Specification Items Host Interface Antenna Reference Channel Modulation USB Small antennas with 0~2 dBi peak gain Contents CH0 to CH78 GFSK Max. TX Characteristics Min. Typ. 2.Modulation Characteristics 1)Delta f1(Avg) 2)Delta f2max(For at least 99.9% of all Delta f2max) 3)Delta f2/ Delta f1 3.Initial Carrier Frequency Tolerance 4. Carrier Frequency Drift 1) One Slot packet drift (DH1) 2) Three Slot packet drift (DH3) 3) Five Slot packet drift (DH5) 4) Max Drift Rate RX Characteristics 1. Receiver Sensitivity (BER<0.1%) 2. Maximum usable signal (BER<0.1%) Unit kHz kHz kHz kHz kHz kHz kHz kHz/50u s dBm dBm

157 121 0.85

+/-20

+/-15

+/-15

+/-15

+/-15

-92

-5 PDF pdfFactory Pro www.fineprint.cn page 14 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 3.6.2 EDR Specification Items Host Interface Antenna Reference Channel Modulation TX Characteristics 1) /4-DQPSK 2) 8PSK 2. Frequency Stability 1) Omega-i 2) Omega-0 3) Omega-0 + Omega-i 3. Modulation Accuracy 1) RMS DEVM

/4-DQPSK 8PSK 2) Peak DEVM

/4-DQPSK 8PSK 3) 99% DEVM

/4-DQPSK 8PSK RX Characteristics 1. Receiver Sensitivity (BER<0.01%) 1) /4-DQPSK 2) 8PSK 2. Maximum usable signal (BER<0.1%) 1) /4-DQPSK 2) 8PSK Contents USB Small antennas with 0~2 dBi peak gain CH0 to CH78

/4-DQPSK 8PSK Min. Typ. Max. Unit

+/-4

+/-4

+/-4

+/-9

+/-9

+/-28

+/-21

+/-15

+/-12

-91

-85

-5

-5 kHz kHz kHz

dBm dBm dBm dBm PDF pdfFactory Pro www.fineprint.cn page 15 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 3.6.3 LE Specification Items Host Interface Antenna Reference Channel TX Characteristics 1. Output power at NOC 2. Modulation Characteristics 1)Delta f1(Avg) 2)Delta f2max(For at least 99.9% of all Delta f2max) 3)Delta f2/ Delta f1 3. Carrier frequency offset and drift 1) Frequency Offset 2) Frequency Drift 3) Max Drift Rate 4.In-band Spurious Emissions 1)+/-2M offset 2)>+/-3MHz offset RX Characteristics 1. Receiver Sensitivity (BER<30.8%) 2. Maximum usable signal (BER<30.8%) Contents USB Small antennas with 0~2 dBi peak gain CH0 to CH39 Min. Typ. Max. Unit 225 185 0.8

-150

-50

-20 4 0.94

-95

-5 275 150 50 20 20 30 dBm kHz kHz Hz/Hz kHz kHz Hz/us dBm dBm dBm dBm PDF pdfFactory Pro www.fineprint.cn page 16 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Description Average currentmA Current consumption WLAN current consumption Sleep moderadio off 2.4GHz RX power savingDTIM=1 2.4GHz RX activeHT20MCS15 2.4GHz TX CCK11Mbps@21dBm 2.4GHz TX HT20MCS15 @17.5dBm 2.4GHz TX HT20MCS8 @18dBm 5GHz VHT80 RX listen2RX 5GHz RX activeVHT80MCS9Nss=2 5GHz TX VHT80MCS9Nss=2 @ 15dBm 5GHz TX VHT80MCS0Nss=2 @ 16.5dBm Bluetooth current consumption Sleep moderadio off Bluetooth TX@9dBm Bluetooth RX Bluetooth SCO connectionHV3 packets + sniff mode

+ scanpage scan interval=1.28secinquiry scan interval=2.56s sniff interval=500ms Bluetooth page scan + inquiry scanpage scan interval=1.28secinquiry scan interval=2.56s Bluetooth page scanpage scan interval=1.28sec Note 1.5 3.3 144 403 496 520 154 242 678 713 1.5 42 21 21 1.7 1.6 Description Average currentmA 1 All result is measured provided VDD33 is 3.3V. Tx power is measured at antenna port. Temperature is 25. 2 Host interface is USB2.0 3 Duty cycle for TX/RX measurement is 100%

4 The chip variation is +/-15%

Software Requirements The driver supports the following operating systems: Linux, Microsoft Windows XP, Vista and Win7. Mfg. software tool is MT7668BUN_QA_Tool. Key component List PDF pdfFactory Pro www.fineprint.cn page 17 of IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 BL-M7668BU4 Module&BT2.1+EDR/4.2/5.0Module&BT2.1+EDR/4.2/5.0 Packaging Information:

PDF pdfFactory Pro www.fineprint.cn page 18 of FCC Statement This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) thi s device may not cause harmful interference, and (2) this device must accept any interference received, incl uding interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursua nt to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful inte rference in a residential installation. This equipment generates uses and can radiate radio frequency energy a nd, if not installed and used in accordance with the instructions, may cause harmful interference to radio com munications. 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 turn ing 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. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help important announcement Important Note:

Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Country Code selection feature to be disabled for products marketed to the US/Canada. This device is intended only for OEM integrators under the following conditions:

1. The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2. The transmitter module may not be co-located with any other transmitter or antenna, 3. For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by supplied firmware programming tool. OEM shall not supply any tool or info to the end-user regarding to Regulatory Domain change. (if modular only test Channel 1-11) As long as the three conditions above are met, further transmitter testing will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. Important Note:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. End Product Labeling The final end product must be labeled in a visible area with the following" Contains FCC ID: 2AL6KBL-

M7668BU4"

Manual Information to the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01 2.2 List of applicable FCC rules CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the modular transmitter 2.3 Specific operational use conditions This module is stand-alone modular. If the end product will involve the Multiple simultaneously transmitting condition or different operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module manufacturer for the installation method in end system. 2.4 Limited module procedures Not applicable 2.5 Trace antenna designs Not applicable 2.6 RF exposure considerations This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. 2.7 Antennas This radio transmitter 2AL6KBL-M7668BU4 has been approved by Federal Communications Commission to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Model Type Connector 2400-2483.5 5150-5250 5250-5350 5470-5725 5725-5850 Peak gain ( dBi ) 2400-2483.5 MHz 5000-5900 MHz External Antenna External Antenna

MHz 1.0dBi for BT 2.0dBi for WLAN MHz

2.0dBi MHz MHz

MHz

2.0dBi Information 2.8 Label and compliance information The final end product must be labeled in a visible area with the following" Contains FCC ID:2AL6KBL-M7668BU4". 2.9 requirements Host manufacturer is strongly recommended to confirm compliance with FCC requirements for the transmitter when the module is installed in the host. 2.10 Additional testing, Part 15 Subpart B disclaimer Host manufacturer is responsible for compliance of the host system with module installed with all other applicable requirements for the system such as Part 15 B. additional testing modes and test on

IEEE 802.11a/b/g/n/ac 2T2R USB WiFi+Bluetooth 5.0 Module Model:BL-M7668BU4 FCC ID: 2AL6KBL-M7668BU4 LABEL AND LOCATION

(Size: L4.0cm x 2.0cm) Label Location _____________________________________________________________________________________________________

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046

<2020-08-29>

TO WHOM IT MAY CONCERN Pursuant to Paragraphs 0.457 and 0.459 of the Commissions Rules (47 C.F.R.) and Section 552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products:

FCC ID 2AL6KBL-M7668BU4 BL-M7668BU4 For the product stated above, we request that the following information be held confidential;

Model name Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos Users Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely,

(Signed) Name / Title: Hanbing Deng / Manager Company: Shenzhen Bilian Electronic Co.,Ltd. Address: Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Phone: 18118768735 Fax: 0755-24665666 E-Mail: 516371599@qq.com

Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, Shenzhen Bilian Electronic Co.,Ltd. China Date: Aug.29, 2020 FCC ID: 2AL6KBL-M7668BU4 Model Number: BL-M7668BU4 To:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD To Whom It May Concern, We, Shenzhen Bilian Electronic Co.,Ltd., declare that this EUT

(FCC ID: 2AL6KBL-M7668BU4) doesnt have Ad Hoc mode function on non-US/Canada frequencies. In addition. The frequency selection feature is disabled by firmware for devices marked to the US/Canada. For DTS part of this device, only channels 1-11 will be used in North America, Country code selection is disabled. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely,

(Signed) Name / Title: Hanbing Deng / Manager Company: Shenzhen Bilian Electronic Co.,Ltd. Address: Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Phone: 18118768735 Fax: 0755-24665666 E-Mail: 516371599@qq.com

Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen Shenzhen Bilian Electronic Co.,Ltd. City, China Aug.29, 2020 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern:

these matters. effect as acts of our own. Sincerely, We, Shenzhen Bilian Electronic Co.,Ltd. the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2AL6KBL-M7668BU4 including the signing of all documents related to Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862.

(Signed) Name / Title: Hanbing Deng / Manager Company: Shenzhen Bilian Electronic Co.,Ltd. Address: Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Phone: 18118768735 Fax: 0755-24665666 E-Mail: 516371599@qq.com

Shenzhen Bilian Electronic Co.,Ltd. Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Module Approval Request Letter 2020-08-29 To:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD Subjects: Module Approval Request Letter The Device,FCC ID: 2AL6KBL-M7668BU4, is seeking FCC authorization as a modular transmitter. The EUT meets the requirement for modular approval as detailed in FCC Public Notice DA 00-1407. Compliance to each of the requirement is described below:

(a) The radio elements must have the radio frequency circuitry be shielded. Physical/discrete and tuning capacitors may be located external to the shield, but must be on the module assembly. Yes the module with a shield. Yes.

(b) The module shall have buffered modulation/data input(s) (if such inputs are provided) to ensure that the module will comply with the requirements set out in the applicable RSS standard under conditions of excessive data rates or over-modulation.

(c) The module shall have its own power supply regulation on the module. This is to ensure that the module will comply with the requirements set out in the applicable standard regardless of the design of the power supplying circuitry in the host device which houses the module. The modular has an onboard 3.3V regulator(integrated in MT7668AU).

(d) The module shall comply with the provisions for external power amplifiers and antennas detailed in this standard. The equipment certification submission shall contain a detailed description of the configuration of all antennas that will be used with the module. The modular has a External antenna which comply with the antenna requirement of Section 15.203.

(e) The module shall be tested for compliance with the applicable standard in a stand-alone configuration, i.e. the module must not be inside another device during testing. The modular was tested in a standalone configuration apart from host units.

(f) The module shall comply with the Category I equipment labeling requirements and CFR 15.212(a)(1)(vi). The modular has its own FCC ID number.

(g) The module shall comply with any applicable FCC RF exposure requirement which are based on the intended use/configurations. Yes, RF cexposure evaluation performed at 20cm.

(h) The modular transmitter complies with all applicable FCC rules. Instructions for maintaining compliance are given in the user instructions. Yes If you have any questions, please feel free to contact us at the address shown below Sincerely, Name / Title: Hanbing Deng / Manager Company: Shenzhen Bilian Electronic Co.,Ltd. Address: Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Phone: 18118768735 Fax: 0755-24665666 E-Mail: 516371599@qq.com

Shenzhen Bilian Electronic Co.,Ltd. Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China UNII Device Declaration Letter To whom it may concern:

We have declared below featured for FCC equipment authorization, Device FCC ID: 2AL6KBL-M7668BU4

(1) DFS Device:

(2) Active / Passive Scanning , adhoc mode access point capability Frequency Band (MHz) 2412-2462 5180-5240 5190-5230 5210-5210 5745-5825 5755-5795 5775-5775 Active Scanning

(the device can transmit a probe

(beacon)) Yes Yes Yes Yes Yes Yes Yes No No No No No No No passive scanning

(where the device is can listen only with no probes) No No No No No No No Yes Yes Yes Yes Yes Yes Yes No

(3) Country code selection ability Yes If yes, pls explain how it was implemented:

(4) Meet 15.202 requirement Yes No pls check below :

Master N/A Client with Radar detection capability Client without radar detection capability, Ad Hoc Mode capability Access point capability Yes Yes Yes Yes Yes Yes Yes No No No No No No No Yes Yes Yes Yes Yes Yes Yes No No No No No No No A master device is defined as a device operating in a mode in which it has the capability to transmit without receiving an enabling signal. In this mode it is able to select a channel and initiate a network by sending enabling signals to other devices A client device is defined as a device operating in a mode in which the transmissions of the device are under control of the master. A device in client mode is not able to initiate a network.

(5) For client devices that have software configuration control to operate in different modes (active scanning in some and passive scanning in others) in different bands (devices with multiple equipment classes or those that operate on non-DFS frequencies) or modular devices which configure the modes of operations through software, the application must provide software and operations description on how the software and / or hardware is implemented to ensure that proper operations modes cannot be modified by end user or an installer. Apply Does not apply

(If apply, pls help to provide explanation on it was implement, and how software was controlled) Should you have any questions or comments regarding this matter, please have my best attention. Sincerely,

(Signed) Name / Title: Hanbing Deng / Manager Company: Shenzhen Bilian Electronic Co.,Ltd. Address: Room 501, Building 3, No. 32, Dafu Road, Zhangge Community, Fucheng Street, Longhua District, Shenzhen City, China Phone: 18118768735 Fax: 0755-24665666 E-Mail: 516371599@qq.com