Philips
Semiconductors
Readers
Advanced Basestation IC
Philips Semiconductors’ highly integrated and powerful Advanced Basestation IC (ABIC) is ideally suited for vehicle
immobilization applications. This device incorporates all necessary functions to read and write to transponders, and
employs a unique AM/PM demodulation technique (AST, Adaptive Sampling Time) that extends the system’s
operating range.
Optimized to operate with Philips Semiconductors’ PCF79xx transponder family, the ABIC can be used in
combination with commonly available transponders that employ ASK modulation. ASK modulation and reception
characteristics are widely programmable for powerful system adaptation. The ABIC is also ideal for ‘intelligent
antenna’ as well as ‘active antenna’ applications.
The carrier frequency can be derived from an on-chip oscillator or external clock source, and a wide range of clock
frequencies can be applied using the programmable on-chip clock divider circuitry. The device enables system
diagnostics via antenna failure detection features. Communication with the device and the transponder is provided
via a serial microcontroller interface. Employing CMOS technology, the device features low power operation and
supports idle and power down modes.
Product overview
Features PCF7991AT PCJ7991AT
Extended system operating range due to powerful AM/PM demodulation
techniques Yes Yes
Ideally suited for ‘intelligent antenna’ and ‘active antenna’ architectures Yes Yes
High antenna drive capabilities CW: 200 mAp CW: 200 mAp
Low antenna driver output resistance 3.5 Ohm 3.5 Ohm
Excellent receiver sensitivity 2 mVpp 2 mVpp
Programmable clock divider, modulator, receiver gain and filter characteristics Yes Yes
Fast ‘read after write’ receiver settling characteristics Yes Yes
On-chip receive EMI filter Yes Yes
Antenna failure mode detection Yes Yes
Few external components Yes Yes
Operating supply voltage Yes Yes
Power down mode 7 µA @ 5.5 V 7 µA @ 5.5 V
Package SO14 SO14
Extended temperature range –40 to +85 °C–40 to +105 °C
Philips Semiconductors
