RFM22B FSK transceiver

RFM22B FSK transceiver

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Other pin/package combinations may be available.

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HopeRF's RFM22B are highly integrated, low cost,433/868/915MHZ wireless ISM transceivers module. The low receive sensitivity(ĘC121dBm) coupled with industry leading +20dBm output power ensures extended range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance. Additional system features such as an automatic wake-up timer, low battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble detection reduce overall current consumption and allow the use of lower-cost system MCUs. An integrated temperature sensor, general purpose ADC, power-on-reset (POR), and GPIOs further reduce overall system cost and size. The RFM22B's digital receive architecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance. The direct digital transmit modulation and automatic PA power ramping ensure precise transmit modulation and reduced spectral spreading ensuring compliance with global regulations including FCC, ETSI. An easy-to-use calculator is provided to quickly configure the radio settings, simplifying customer's system design and reducing time to market.



  • Frequency Range: 433/868/915MHz ISM bands
  • Sensitivity = –121 dBm
  • Output power range:+20 dBm Max
  • Low Power Consumption
  • Data Rate = 0.123 to 256 kbps
  • FSK, GFSK, and OOK modulation
  • Power Supply = 1.8 to 3.6 V
  • Ultra low power shutdown mode
  • Digital RSSI
  • Wake-up timer
  • Auto-frequency calibration (AFC)
  • Power-on-reset (POR)
  • Antenna diversity and TR switch control
  • Configurable packet handler
  • Preamble detector
  • TX and RX 64 byte FIFOs
  • Low battery detector
  • Temperature sensor and 8-bit ADC
  • –40 to +85 °C temperature range
  • Integrated voltage regulators
  • Frequency hopping capability
  • On-chip crystal tuning
  • 14-PIN DIP & 16-PIN SMD package
  • Low cost


  • Remote control
  • Home security & alarm
  • Telemetry
  • Personal data logging
  • Toy control
  • Tire pressure monitoring
  • Wireless PC peripherals
  • Remote meter reading
  • Remote keyless entry
  • Home automation
  • Industrial control
  • Sensor networks
  • Health monitors
  • Tag readers


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