2.4GHz Low Power RF SOC with DC-to-DC Converter

General Description

The SPRF24B31A is a low power RF SOC built in with 2.4GHz RF transceiver , low power 8 bit MCU and one battery supporting DC-to-DC converter. It can apply 2.4GHz wireless mouse , remote control , toy and other mobile devices.


  • CPU
    • Built-in 8-bit SUNPLUSIT CPU core with the maximum clock rate up to 12MHz.
  • Memory
    • 8K bytes MTP (Multi-Time-Programmable) memory and 256 bytes RAM.
    • Option bytes located in the MTP Memory are loaded before Power-On Reset.
  • Power
    • Built-in DC/DC and LDO converters which can supply up to 40mA current (VDD_OUT1 + VDD_OUT2) for external devices and on-chip power consumption.
  • Clock
    • Built-in internal 12 MHz Oscillator for internal usage. System clock can select 4 kinds of frequency (12MHz, 6MHz, 3MHz, 1.5MHz)
    • Built-in internal 5KHz oscillator for internal usage
  • I/O
    • Up to 18 general purpose I/Os
    • Programmable I/O direction with resistive pull-up/down control
  • Timer
    • One 14-bit free-running timer with overflow interrupt and real time interrupt
    • One 8-bit re-loadable timer can be cascaded as a 16-bit timer
  • Input Capture
    • Two input capture registers
    • Selectable edge triggering for capture input
    • Pulse or period measurement
  • Low Operating Voltage from 0.9V to 3.6V
    • 2.4GHz GFSK RF transceiver Features
  • 2400-2483.5 MHz ISM band operation.
  • Support 250Kbps, 1Mbps and 2 Mbps air data rate.
  • Sensitively up to -87 dBm (@ 2Mbps).
  • Output power up to 5 dBm.
  • Low-noise amplifier, power amplifier, modern and data slicer/recovery on chip.
  • High speed RF link data rate Max. 2M bit/s.
  • Tolerate +- 60ppm 16M crystal.
  • Variable payload length from 1 to 32byte.
  • Automatic packet processing.
    • Package
  • 40Pin QFN 6 X 6 mm package

Product Solutions

SunplusIT offer a series of comprehensive ASSP & ASIC product solutions with on-site engineering supports targeting Human Interface Devices, Industry Control, PC External HDD/ODD Drives and PC/NB Camera market segments.

MCU Solutions
  • Wired Optical Mouse
  • Wireless Desktop (Keyboard & Mouse)
  • MCU for HID & Toy Devices

Image Solutions
  • Web camera controllers
  • NB camera controllers




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