Super-Tiny ASK (Digital AM) Superheterodyne Receiver With Good Sensitivity

The RXB14 is an exceptionally small ASK receiver with still good sensitivity.


The breakout board exposes three pins which are labeled on the front side:

Pin Label Description
1 GND Ground
2 D0 Data Out
3 +5V 4.5-5.75V

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 pin (17cm for 433MHz).

Technical Data

The receiver chip is covered under a metal shield plate.

Item Description
Voltage 4.5V-5.75V
Current fully operational 6mA @ 433MHz, 4.8mA @ 315MHz
Frequency 315MHz or 433.92MHz
RX Sensitivity -110dBm
Modulation ASK (AM)
Data rate 2.4kbps
Size 30x8.5x4mm

Note the difference in supported input voltage: the 315MHz version acvcepts 3.3-5.75V. The 433MHz version requires at least 4.5V and will not work with 3.3V.

Data Sheet

RXB14 ASK Receiver


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(content created Apr 21, 2024)