Superheterodyne ASK (Digital AM) Receiver With Sweep Mode

The RXB12 breakout board is based on the SYN470R single-chip antenna-in to data-out solution.

The receiver does not come with a dedicated EV1527 encoder chip on board which makes the receiver versatile (it can receive any type of ASK-encoded data) but requires a separate microprocessor to decode the received data.


The receiver chip supports a frequency range from 300MHz to 440MHz. The fixed frequency is set via a crystal:

Crystal frequency (MHz) RX frequency (MHz) Remarks
4.8970 315 US
6.0630 390  
6.4983 418  
6.7458 433.92 Europe


The board exposes four pins that are labeled on the back:

Pin Label Description
1 VCC 3.3-5.5V
2 DAT Data Out
3 GND negative voltage
4 ANT Antenna

Make sure the power supply is properly filtered and carries no exceptional noise which could interfere and distort reception.


There is no antenna mounted. Make sure to add an antenna or else the board will have poor reception.

For example, solder a wire to the ANT antenna solder pad (17cm for 433MHz).

Technical Data

Item Description
Voltage 3.3V-5.5V
Current fully operational 2.5mA @ 315MHz
Current polled operation 250uA (10:1 duty cycle)
Current shutdown 0.9uA
Frequency 300-440MHz, breakout boards are set to one specific frequency via a crystal
RX Sensitivity -107dBm @ 433MHz, -106dB @ 315MHz
Modulation ASK (AM)
Chip SYN480R
Data rate 2.5kbps (sweep mode), 10kbps (fixed frequency)
Size 17.2x11.8x5mm

Data Sheet



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(content created Apr 21, 2024)