This part is a kind of semiconductor called 12C509AF.

Function of this product has (xxx12C509Ax) 18/20-Pin 8-Bit CMOS Microcontroller.

Manufacturers : Microchip Technology

Image and pinout :

Some of the text within the PDF file :

rfPIC12C509AG/509AF Data Sheet 18/20-Pin 8-Bit CMOS Microcontroller with UHF ASK/FSK Transmitter © 2001 Microchip Technology Inc. Preliminary DS70031A Note the following details of the code protection feature on PICmicro ® MCUs. • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet. Microchip believes that its family of PICmicro microcontrollers is one of the most secure products of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet. The person doing so m [ ... ]

12C509AF PDF Datasheet Download