Overview
The PCF7991AT/1081/M,118 is a fully integrated Advanced Basestation IC (ABIC) designed by NXP USA Inc. This device is specifically tailored for use in car immobilizer systems, providing both read and write access to identification transponders. It is compatible with the Philips transponder family (PCF79xx) and other transponders operating at 125 kHz, utilizing Amplitude Shift Keying (ASK) for write operations and Amplitude/Phase Modulation (AM/PM) for read operations.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SO14 plastic small outline package; 14 leads (SOT108-1) |
| Temperature Range | -40°C to +85°C |
| Operating Frequency | 125 kHz |
| Modulation Type | ASK (Amplitude Shift Keying) for write, AM/PM (Amplitude/Phase Modulation) for read |
| Interface | Three-wire digital interface (SCLK, DIN, DOUT) |
| Power Modes | Active, Idle, and Power-down modes |
Key Features
- Fully integrated single chip basestation with a robust antenna coil power driver stage and modulator
- Adaptive Sampling Time (AST) demodulation technique to extend system operation range and eliminate zero amplitude modulation response
- Programmable filters, amplifier, and digitizer for optimized system and transponder requirements
- Low-noise adaptive sampling time demodulator and phase measurement capabilities
- Three-wire microcontroller interface for programming and bidirectional communication with the transponder
- Support for Idle and Power-down modes for power saving
Applications
The PCF7991AT/1081/M,118 is primarily used in car immobilizer systems, providing secure read and write access to identification transponders. It is also suitable for other applications requiring high-performance basestation functionality, such as remote keyless entry systems and other RFID-based security solutions.
Q & A
- What is the primary application of the PCF7991AT/1081/M,118?
The primary application is in car immobilizer systems, providing read and write access to identification transponders.
- What frequency does the PCF7991AT/1081/M,118 operate at?
The device operates at 125 kHz.
- What modulation types are supported by the PCF7991AT/1081/M,118?
It supports ASK (Amplitude Shift Keying) for write operations and AM/PM (Amplitude/Phase Modulation) for read operations.
- 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.
- What types of power modes does the PCF7991AT/1081/M,118 support?
The device supports Active, Idle, and Power-down modes for power saving.
- How does the PCF7991AT/1081/M,118 communicate with the microcontroller?
The communication is done via a three-wire digital interface (SCLK, DIN, DOUT).
- What is the package type of the PCF7991AT/1081/M,118?
The device is packaged in a SO14 plastic small outline package; 14 leads (SOT108-1).
- What is the temperature range of the PCF7991AT/1081/M,118?
The temperature range is -40°C to +85°C.
- Can the PCF7991AT/1081/M,118 be used with other transponder types?
Yes, it can be used with other transponder types operating at 125 kHz.
- What are the key components integrated into the PCF7991AT/1081/M,118?
The device integrates a powerful antenna driver/modulator, a low-noise adaptive sampling time demodulator, programmable filters/amplifier, and digitizer.
