This part is a kind of semiconductor called PCF7946AT.

Function of this product has Security Transponder Plus Remote Keyless Entry.

Manufacturers : Philips

Image and pinout :

PCF7946AT image and datasheet pinout



Some of the text within the PDF file :

Philips Semiconductors Product Profile Security Transponder plus Remote Keyless Entry, HITAG2PLUS Features • Compatible with Security Transponder, PCF7936AS. • Rolling Code Generator for keyless entry • 14-pin SO package Transponder • 64/32 bit mutual authentication • 32 bit unique device identification number • Fast authentication, 39ms • 48 bit Secret Key • 128 bit user memory (EEPROM) • EEPROM read/write in cipher mode • EEPROM read/write protection capability • Excellent sensitivity in read and write mode Code Hopping Generator • Four user buttons (15 + 1 commands) • LED acknowledgment of transmission • 42 bit unidirectional code hopping • 48 bit Remote Secret Key • 114 bit message with run-in, device identification, function code, t [ ... ]


PCF7946AT PDF Datasheet Download

2017/04/23 16:41 2017/04/23 16:41