SPRF24B31A
2.4GHz Low Power RF SoC with DC-to-DC Converter ??The Optimized Single-Chip Solution for Battery-Powered Wireless Peripherals
General Description
The SPRF24B31A is a highly integrated, ultra-low-power RF System-on-Chip (SoC) designed specifically for mobile wireless devices. By combining a 2.4GHz RF transceiver, a high-efficiency 8-bit MCU, and an onboard DC-to-DC converter, this chip enables high-performance wireless operation from just a single battery cell (0.9V).
The SPRF24B31A is the perfect engine for energy-sensitive remote devices. Whether you are designing a wireless mouse, a sophisticated remote control, or interactive toys, this SoC provides the processing power and wireless stability required for a premium user experience.
The integration of the DC-to-DC converter is a game-changer for mobile design, allowing the system to extract maximum energy from a single battery while providing a stable voltage to both the internal logic and external components. Combined with 8K bytes of Multi-Time Programmable (MTP) memory, it offers the flexibility for multiple firmware updates and rapid product iterations.
DC-DC & Single Cell
0.9V??.6V operation; integrated DC/DC & LDO, up to 40mA for external sensors/LEDs; ultra-low consumption.
2.4GHz RF
ISM 2400??483.5MHz; 250K/1M/2Mbps; up to -97 dBm at 250Kbps; on-chip LNA, PA (5 dBm), data recovery.
8-bit MCU & MTP
12MHz CPU; 8K MTP ROM, 256B RAM; flexible clock 12/6/3/1.5MHz; 18 GPIOs, timers, input capture.
Key Features
Advanced Power & DC-DC Converter
- check_circle Single Battery Operation: 0.9V to 3.6V.
- check_circle Integrated DC/DC & LDO: Up to 40mA (VDD_OUT1 + VDD_OUT2) for external sensors or LEDs.
- check_circle Ultra-Low Consumption: Optimized for long battery life in mobile applications.
High-Performance 2.4GHz RF
- check_circle ISM Band: 2400??483.5 MHz.
- check_circle Air Data Rates: 250Kbps, 1Mbps, 2Mbps.
- check_circle Sensitivity: Up to -97 dBm (at 250Kbps), -87 dBm (at 2Mbps).
- check_circle On-chip LNA, PA (up to 5 dBm), data recovery ??minimal external BOM.
Processing & Intelligence
- check_circle Efficient CPU: 8-bit SunplusIT core up to 12MHz.
- check_circle Memory: 8K MTP ROM, 256B RAM; option bytes loaded before Power-On Reset.
- check_circle Flexible Clocking: 12MHz internal osc, system 12/6/3/1.5MHz selectable.
- check_circle Auto Packet Processing: Variable payload 1??2 bytes to reduce MCU overhead.
Peripherals & I/O
- check_circle 18 General Purpose I/Os: Programmable direction, pull-up/pull-down.
- check_circle Precision Timers: 14-bit free-run, 8-bit re-loadable (cascadable to 16-bit).
- check_circle Input Capture: Two registers for pulse or period measurement.
Technical Specifications
| Parameter | Specifications |
|---|---|
| RF Frequency Range | 2.400 GHz - 2.4835 GHz |
| Operating Voltage | 0.9V - 3.6V (Single Battery Supported) |
| Air Data Rate | 250Kbps / 1Mbps / 2Mbps |
| Sensitivity | -97 dBm (at 250Kbps) / -87 dBm (at 2Mbps) |
| Program Memory | 8K Bytes MTP ROM |
| Data Memory | 256B RAM |
| Integrated DC/DC | Yes (Up to 40mA Out) |
| Package Type | 40-Pin 6x6mm QFN |
Main Applications
- mouse Wireless RF Mice (Single Battery Designs)
- remote_gen Advanced Remote Controls (Smart TV/Set-Top Box)
- toys Interactive Wireless Toys
- touch_app Mobile HID Devices and Portable Presenters