Overview
The NXP PCF7991AT/1081/M1 is a fully integrated Advanced Basestation IC (ABIC) designed for car immobilizer systems. This IC provides read and write access to identification transponders, particularly those from the Philips transponder family (PCF79xx) and other transponders operating at 125 kHz using Amplitude Shift Keying (ASK) for write and Amplitude/Phase Modulation (AM/PM) for read operations. The device is optimized for high-performance basestations with a low external component count, making it ideal for immobilizer read/write and read-only systems.
Key Specifications
| Attribute | Value |
|---|---|
| Supply Voltage | 4.5V to 5.5V |
| Operating Temperature Range | -40°C to +85°C |
| Storage Temperature Range | -65°C to +125°C |
| Package Style | SOIC-14 |
| Mounting Method | Surface Mount |
| Package Quantity per Reel | 2500 |
Key Features
- Integrated Antenna Driver/Modulator: Provides a powerful antenna driver and modulator for efficient communication with transponders.
- Adaptive Sampling Time (AST) Demodulation: Extends the system operation range and eliminates the effect of zero amplitude modulation response from the transponder due to resonance frequency tolerances.
- Programmable Filters/Amplifier and Digitizer: Allows optimization of receiver characteristics to system and transponder requirements.
- Three-Wire Microcontroller Interface: Enables programming and bidirectional communication with the transponder, configurable for two-wire operation.
- Power-On Reset and Power-Down Modes: Includes idle and power-down modes for power saving, with the serial interface remaining operational.
Applications
The NXP PCF7991AT/1081/M1 is primarily used in car immobilizer systems, providing secure read and write access to identification transponders. It is suitable for both immobilizer read/write and read-only systems, making it a crucial component in automotive security systems.
Q & A
- What is the primary function of the NXP PCF7991AT/1081/M1 IC?
The primary function is to provide read and write access to identification transponders in car immobilizer systems.
- What is the operating voltage range of the PCF7991AT/1081/M1?
The operating voltage range is 4.5V to 5.5V.
- What is the package style of the PCF7991AT/1081/M1?
The package style is SOIC-14.
- What is the Adaptive Sampling Time (AST) demodulation technique used for?
The AST demodulation technique extends the system operation range and eliminates the effect of zero amplitude modulation response from the transponder due to resonance frequency tolerances.
- How does the PCF7991AT/1081/M1 interface with a microcontroller?
The device interfaces via a three-wire digital interface, which can be configured for two-wire operation.
- What are the power-down modes supported by the PCF7991AT/1081/M1?
The device supports idle and power-down modes for power saving, with the serial interface remaining operational.
- What is the storage temperature range of the PCF7991AT/1081/M1?
The storage temperature range is -65°C to +125°C.
- How many units are typically packaged per reel?
2500 units are typically packaged per reel.
- What type of modulation does the PCF7991AT/1081/M1 use for write operations?
The device uses Amplitude Shift Keying (ASK) for write operations.
- What is the purpose of the programmable filters/amplifier and digitizer in the PCF7991AT/1081/M1?
The programmable filters/amplifier and digitizer allow optimization of receiver characteristics to system and transponder requirements).
