PCF7991AT

The PCF7991 is a highly integrated and powerful advanced basestation IC, ABIC, ideally suited for vehicle immobilisation applications. The device incorporates all necessary functions to facilitate reading and writing of transponders.

The ABIC, PCF7991 employs a unique AM/PM demodulation technique that extends the system operating range compared with simple envelope detection.

Optimised to operate with the Philips transponder family(PCF79xx)PCF7991AT , the ABIC PCF7991AT can be used in combination with commonly available transponder that employ ASK modulation. ASK modulation and receive characteristics of PCF7991AT are widely programmable for powerful system adaptation. The ABIC fits "Intelligent Antenna" as well as "Active Antenna" applications.

The carrier PCF7991AT frequency can be derived from an on-chip oscillator or an external clock source. A wide range of clock frequencies can be applied due to the programmable on-chip clock divider circuitry.

PCF7991AT enables system diagnostic functions by antenna fail detection features.

Communication with PCF7991AT and the transponder is provided via the serial microcontroller interface.

Employing CMOS technology,PCF7991AT features low power operation and supports Idle and Powerdown modes.