Superheterodyne ASK (Digital AM) Receiver With Great Sensitivity

The AK-RXB59R is a superheterodyne ASK receiver based on the CMT2220LS receiver chip that can pick up signals sent out by ASK senders and most remote controls.

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 board is very small and easily integrateable into DIY projects.


The board exists both for 315MHz (US) and 433.92MHz (Europe, other regions). The frequency is determined by the crystal used.

By looking at the top of the crystal, the supported frequency can be implied:

Crystal frequency Receiver frequency
9.81563MHz 315MHz
13.52127MHz 433.92MHz


The board comes with pre-soldered four pins labeled on the back.

Pin Label Description
1 G GND (negative voltage)
2, 3 DATA Data Out
4 V 3.6-5.5V

Pins 2 and 3 are internally the same (inter-connected). There is just one data output that is HIGH when receiving a signal.

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


The board comes with a pre-soldered coiled wire-antenna (22.6cm for 315MHz and 17cm for 433MHz).

Technical Data

Item Description
Voltage 3.6V-5.5V
RX Sensitivity -107dBm
Working Current <5.3mA
Modulation ASK (AM)
Frequency 315MHz or 433.92MHz
Chip CMT2220LS
Data rate 1-5kbps
Size 24x10x5mm

Data Sheet



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(content created Apr 17, 2024)