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The iM240B is a compact wireless module for the globally available 2.4 GHz frequency band.

The module has superb HF performance, resulting in a link budget of approx. 104 dB. Accordingly, high ranges (> 500m) can be achieved at a data rate of 250 kbps. The quality of the radio link can be evaluated using field strength measurement (RSSI1).
In addition to an IEEE 802.15.4 transceiver and a microcontroller, it features an integrated PCB antenna. Of course you can get the module with a 50Ω port for connecting an external antenna. The iM240B can be soldered directly on the target hardware just as usual SMD components. The integration of an RF system in a new or existing product is therefore significant simplified, which reduces development time, risk and costs.

The iM240B is not available via webshop. Please make a request to our sales-team.


Key Features

Application Area

  • Compact radio module for 2.4 GHz
  • Huge link budget (104 dB) @ 250 kbps
  • RF datarate up to 250 kbps
  • Compliant to IEEE 802.12.4
  • Received signal strength indicator (RSSI)
  • Sample applications available
  • Bootloader functionallity included
  • 2-wire interface (TWI2) *, compatible to Philips l²C protocol
  • Solderable like a SMD component
  • Integrated PCB antenna or 50Ω pad
  • RoHS conform
  • Building automation
  • Metering
  • Remote control
  • Telemetrie
Frequency range2405 MHz to 2480 MHz
Operating channels16
ModulationDSSS with O-QPSK
RF output powertyp. 3 dBm (50Ω Pad)
Receiver sensitivitytyp. -101 dBm @ PER3
RF data rate250 kbps
RF rangeup to 700 m line of sight
Operating voltage2 V to 3.6 V (typ. 3.0 V)
Current consumptiontyp. 20 mA (receive)
typ. 22 mA (transmit @ 0 dBm)
typ. 4 mA (µC active, transceiver off)
typ. 1 µA (power down)
Interfaces6 general purpose IOs (analog/digital/l²C)
3 digital IOs2 analog input, 1 analog reference
IO’sUART, typ. 38.4 kBaud (further on demand)
2-wire Serial Interface (Philips l²C compatible) *
Dimensions (LxWxH)20 x 32.5 x 5 mm
Operating temperature-20°C to +70°C