PCF7941

www.DataSheet4U.com Philips Semiconductors Preliminary Information Product Profile Security Transponder and RISC Controller, STARC lite Features Compatible with Security Transponder, PCF7936AS. RISC Programmable Keyless Entry features 384 Bit EEPROM 16-Pin SO package Transponder 64/32 bit mutual authentication calculation unit 32 bit unique device identification number 48 t bit Secre Key Fast mutual authentication (39 ms) EEPROM read/write protection capability Excellent 5 sensitivity in read and write mode (3 µT) RISC Controller Advanced 8-bit RISC architecture 4 Kbyte ROM, 64 Byte RAM On-chip < RC oscillator ( ±10%) Short instruction execution time (as fast as 1µs) 11 I/O ports, general purpose Code hopping based on transponder calculation unit Code hopping synchronization via transponder Clock input to serve as external data rate reference Programmable battery low detection Low power consumption (300 µA, PD 300 nA) Single battery cell operation (2.1V to 5.5V) Device supply can be derived from LF Field Typical Application General Description PCF7941 The PCF7941 is a single chip high performance Security Transponder and Keyless Entry controller, ideally suited for vehicle immobilizer applications that incorporate keyless entry functions. The transponder circuitry is compatible with the Security Transponder PCF7936AS, for use in mixed systems that employ a STARC and a standard Security Transponder, PCF7936AS, at the same time. ...