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BL-M7668BU4
IEEE 802.11a/b/g/n/ac 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0
Filter
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) Wireless
LAN (WLAN) network interface controller complying with the 802.11 specification and Bluetooth over
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
Figure 1 BL-M7668BU4 Block Diagram
Dixplexer
Antenna0
Dixplexer
Antenna1
40MHz
Filter
Antenna2
Internal
DC/DC
Internal
LDO
1.5V
2.4G TX0/RX0
1.2V
WF_
RFIO
5G TX0/RX0
USB2.0 Interface
2.4G TX1/RX1
WF_
RFIO
5G TX1/RX1
BT_
RFIO
2.4G TX2/RX2
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