General Introduction
RFM12B is a low costing ISM band transceiver module implemented with unique PLL. It works signal ranges from 433/868/915MHZ bands, comply with FCC, ETSI regulation. The SPI interface is used to communicate with microcontroller for parameter setting.
 

Features:

• Low costing, high performance and price ratio
• Tuning free during production
• PLL and zero IF technology
• Fast PLL lock time
• High resolution PLL with 2.5 KHz step
• High data rate (up to 115.2 kbps with internal demodulator，with external RC filter highest data rate is 256 kbps)
• Differential antenna input/output
• Automatic antenna tuning
• Programmable TX frequency deviation (from 15 to 240 KHz)
• Programmable receiver bandwidth (from 67 to 400 kHz)
• Analog and digital signal strength indicator (ARSSI/DRSSI)
• Automatic frequency control (AFC)
• Data quality detection (DQD)
• Internal data filtering and clock recovery
• RX synchron pattern recognition
• SPI compatible serial control interface
• Clock and reset signal output for external MCU use
• 16 bit RX Data FIFO
• Two 8 bit TX data registers
• Standard 10 MHz crystal reference
• Wakeup timer
• 2.2V - 3.8V power supply
• Low power consumption
• Standby current less than 0.3uA
• Supports very short packets (down to 3 bytes)