This part is a kind of semiconductor called CIR2272AN.

Function of this product has Built-in RF amplification fixed code decoder.

Manufacturers : Chiprui

Image and pinout :

Some of the text within the PDF file :

CIR2272AN is a built-in RF amplifier fixed code decoding Integrated circuit, which is used in conjunction with CIR2262A. Highest can be grouped Combined 312 group code. Reduce the probability of re-code.

It integrates RF release Big function. Thus greatly simplifying the circuit of the product. Reduced
Cost of production. Reduced production processes. Effectively optimize the product power
Road design. The product is widely used in remote control doorbell, remote control switch,

Remote control alarm and other industrial remote control field. [ ... ]

CIR2272AN PDF Datasheet Download