5dBm 2.4GHz transceiver

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Key Features
  • 2.4GHz transceiver module
  • Supports 1 and 2Mbps data rates
  • FSK/GFSK modulation
  • Ultra low power consumption
  • Programmable output power: -35 ~ +5 dBm
  • Tx Output Power: 5dBm(1mW)
  • Rx sensitivity: -88dBm
  • Data interface: SPI
  • Operating temperature: -40-85°C
  • Power supply: DC 1.9V~3.6V
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SQI73 is a low-power, high-speed FSK/GFSK transceiver module specifically operating in the world wide ISM frequency band at 2400 - 2483.5 MHz The module features low cost, small size, high stability and good consistency.

SQI73 is a GFSK transceiver operating in the world wide ISM frequency band at 2400- 2483.5 MHz. Burst mode transmission and up to 2Mbps air data rate make them suitable for applications requiring ultra low power consumption. The embedded packet processing engines enable their full operation with a very simple MCU as a radio system. Auto re-transmission and auto acknowledge give reliable link without any MCU interference.

SQI73 operates in TDD mode, either as a transmitter or as a receiver. The RF channel frequency determines the center of the channel used by SQI73. The frequency is set by the RF_CH register in register bank 0 according to the following formula: F0= 2400 + RF_CH (MHz). The resolution of the RF channel frequency is 1MHz.

A transmitter and a receiver must be programmed with the same RF channel frequency to be able to communicate with each other.

The output power of SQI73 is set by the RF_PWR bits in the RF_SETUP register. Demodulation is done with embedded data slicer and bit recovery logic. The air data rate can be programmed to 250Kbps, 1Mbps or 2Mbps by RF_DR_HIGH and RF_DR_LOW register. A transmitter and a receiver must be programmed with the same setting.

The maximum air data rate can be up to 2Mbps. It can be widely applied in various wireless connections in daily life or activities. It is compliant with the specifications regulated and required by FCC and ETSI.

Low Power Mode
In power down mode SQI73 is in sleep mode with minimal current consumption. SPI interface is still active in this mode, and all register values are available by SPI.


  • 4-pin SPI interface with maximum 8 MHz clock rate
  • Support 1 and 2 Mbps air data rate
  • FSK/GFSK modulation
  • Programmable output power: -35 ~ +5 dBm
  • Rx sensitivity -88dBm at the 1M data rate
  • Programmable frequency range 2400-2483.5MHz, 83 channels selectable
  • Ultra low power consumption
  • Data buffering, burst data transmission, auto re-transmission and auto acknowledge
  • 6 data pipes for 1:6 star networks
  • Low-price MCU enables high-performance RF system
  • Open area distance: 70-80m


  • Working frequency: 2400MHz-2483.5MHz
  • Modulation: FSK/GFSK
  • Tx Output Power: 5dBm(1mW)
  • Rx sensitivity: -88dBm
  • Data rate: 250K/1M/2Mbps 
  • Tx current: <30mA 
  • Rx current: <23mA 
  • Standby current: <3uA 
  • Channel selection: 83 channels
  • Data interface: SPI
  • Operating temperature: -40-85°C
  • Power supply: DC 1.9V~3.6V
  • Size: 16.8x12.8mm(PCB antenna included)


  • Wireless mouse, keyboard and gamepad
  • Wireless audio and headsets
  • Children finder and tracker
  • Medical equipment and remote control
  • Logistics tracker, warehouse inspector, E-label, etc.
  • Wireless applications of consumer electronics
  • Low consumption telemeter
  • Wireless sensor network(WSN)

For more detailed specifications on the SQI73 2.4GHz ISM Module please download the datasheet.

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