HS6621Cx — Ultra-Low-Power Bluetooth 5.1 SoC

HS6621Cx is a power-optimized true SoC for Bluetooth Low Energy 5.1 and proprietary 2.4 GHz applications. It integrates a high-performance low-power RF transceiver, BLE baseband, rich peripherals, and efficient power management. Target applications include keyboards/mice/remotes, sports/leisure devices, phone accessories, and consumer electronics.

Key Features

RF Transceiver

• Sensitivity:
  –95.5 dBm @1 Mbps
  –93 dBm @2 Mbps
  –98 dBm @500 kbps
  –101.5 dBm @125 kbps

• TX Power: –20 to +9 dBm

Processor

• ARM Cortex-M4F @ up to 64 MHz

• SWD debug

Memory

• 64 KB SRAM

• Flash:
  – HS6621CG/CW: 1 MB
  – HS6621CM/CQ: 512 KB

Clocks

• 32 MHz crystal/RC, 32.768 kHz crystal/RC (varies by model)

Power Management

• Supply: 1.8–3.6 V

• RX: 6.6 mA peak

• TX: 6.2 mA (+0 dBm)

• Sleep modes:
  0.5 μA (no 32 kHz RC)
  1.6 μA (with 32 kHz RC)
  5.0 μA (32 kHz RC + 64 KB RAM retained)
  4.0 μA deep sleep / 1.6 μA ultra-sleep

• Integrated DCDC Buck

• Built-in Li-ion charger (100/300 mA) on CG/CQ variants

Peripherals

• 8× DMA, 2× UART (1× ISO7816), 1× I²S

• 3× I²C, 2× SPI, QSPI LCD/AMOLED & Flash controllers

• 3× Timer/PWM, 3× QDEC, Watchdog, RTC

Package & Temperature

• HS6621CG/CW: QFN48 6×6 mm

• HS6621CM/CQ: QFN32 4×4 mm

• –40°C to +85°C

Ideal for ultra-low-power BLE and proprietary wireless products