Nanjing Zhongke Microelectronics Si24R1

Si24R1 is a single chip transceiver with an embedded ARQ baseband protocol engine, suitable for ultra- low power wireless applications and is designed for operation in the 2.4GHz ISM frequency band at 2400MHz to 2525MHz. The operating frequency band is divided into 126 RF channels and the resolution of the RF channel frequency setting is 1MHz. Internal high PSRR LDO power ensures reliable work in a wide supply range from 1.9V to 3.6V. Si24R1 uses GFSK/FSK digital modulation and demodulation. The air data rate is configurable and can be programmed to 2Mbps, 1Mbps and 250Kbps. The higher data rate contributes the lower power consumption because it takes less time to transmit or receive signals. The output power of Si24R1 can be adjusted and it can base on actual application to configure the appropriate output power, thus saving the power of system. Si24R1 is especially optimized for low power wireless applications. All register values and FIFO values are maintained in Shutdown mode, and the shutdown supply current is 1uA. In Standby mode, the clock still works, and the standby supply current is 15uA. It takes less than 130us to start data transmitting and receiving. Si24R1 is easy to use, and it can realize communication only by configuring several registers through the SPI with an MCU(microcontroller). The embedded ARQ baseband protocol engine is based on packet communication and supports various modes from manual operation to advanced autonomous protocol operation. Internal FIFOs ensure a smooth data flow between the radio front end and the system's MCU. Enhanced ARQ baseband protocol engine reduces the system consumption of MCU by handling all high speed link layer operations. Si24R1 has very low costs of system application. To design a radio system with the Si24R1, you simply need a microcontroller and a few external passive components. Digital I/O is compatible with several I/O voltage standards such as 2.5V/3.3V/5V, and it can be connected directly to various MCU I/O ports.

• Worldwide 2.4GHz ISM band operation
• Modulation: GFSK/FSK
• Air data rate: 2Mbps/1Mbps/250Kbps
• Ultra low shutdown current: 1uA
• Ultra low standby current: 15uA
• Receiver sensitivity: - 83dBm @2Mbps
• Maximum transmission power: 7dBm
• RX supply current (2Mbps): 15mA
• TX supply current (2Mbps): 12mA (0dBm)
• Internal integrated high PSRR LDO
• Supply range: 1.9 - 3.6V
• Digital I/O voltage range: 1.9 - 5.25V
• Max 130us start- up from standby mode
• Maximum rate 10MHz,4- wire interface SPI
• Embedded ARQ baseband protocol engine
• TX/RX Hardware interrupt output
• Support 1bit RSSI output
• Low cost crystal: 16MHz±60ppm
• Minimal peripheral devices, reducing system application costs
• QFN20 package or COB package

• Wireless mouse and keyboards
• Remote control
• Somatosensory device
• Active RFID
• Smart Grid and Home automation
• Wireless audio
• Wireless data transceiver module
• Ultra low power wireless sensor networks