The MediaTek MT6631 is a 4-in-1 connectivity chip that includes a 2.4GHz Wi-Fi/Bluetooth transceiver front end, a 5GHz Wi-Fi transceiver front end, a GPS receiver front end, and a complete FM receiver, as well as an integrated passive device (IPD) in a QFN40 package. Figure 1-1 shows a simplified block diagram and how to use the MT6631. An always-on, low-dropout regulator (ALDO) provides the supply voltage to the top control logic in the MT6631. The top-level control logic controls each subsystem independently. Each subsystem also has dedicated LDOs. A thermal sensor and a low-speed ADC (analog-to-digital converter) are provided to monitor the temperature changes of the MT6631. The MT6631 does not have its own dedicated crystal oscillator. It uses an external (possibly temperature-compensated) oscillator or a clock source from the platform's companion chip.


peculiarity Wi-Fi/Bluetooth Concurrent reception (co-RX) of WiFi-2.4GHz and Bluetooth for higher throughput -WiFi-5GHz and Bluetooth Simultaneous Operation (FDD) Wi-Fi - Dual-band (2.4GHz and 5GHz) single-stream 802.11 a/b/g/n/ac RF with 20/40/80MHz bandwidth - Supports global Wi-Fi 5G channels, including new bands (5925MHz) in the United States and China, as well as Bluetooth FDD operation -Supports 802.11d/e/h/i/j/k/r/v/w and matching D-die -Maximum integrated 2.4GHz PA 20dBm CCK output power, 5GHz PA 17dBm OFDM 54Mbps output power and 15dBm VHT80 MCS9 output power -Typical Rx sensitivity with chip modem: -76.5dBm in 11g 54Mbps mode and 11a 54Mbps mode, and -62dBm in 11ac VHT80 MCS9 mode -Integrated power detector to support Tx power control per pack Built-in calibration for PVT variations - Fully integrated synthesizer with support for multiple crystal clock frequencies -Configurable Wi-Fi 2.4GHz PA for increased efficiency in low-power applications. - External PA and LNA support for WiFi-2.4GHz and WiFi-5GHz.

Bluetooth - Compliant with Bluetooth specifications v2.1+EDR, 3.0+HS and v4.1+HS - Integrated PA with 8dBm (Class 1) transmit power -Typical Rx sensitivity of companion chip modem: GFSK -94dBm, DQPSK -93dBm, 8-DPSK -87.5dBm -Low-power scanning function to reduce power consumption in scanning mode