Overview
The PCF7991AT/1081/M,1 is an Advanced Basestation IC (ABIC) designed and manufactured by NXP USA Inc. This integrated single-chip solution is primarily used in car immobilizer systems, providing read and write access to identification transponders. The device is compatible with the Philips transponder family (PCF79xx) and other transponders operating at 125 kHz, employing Amplitude Shift Keying (ASK) for write operations and Amplitude/Phase Modulation (AM/PM) for read operations.
Key Specifications
| Attribute | Specification |
|---|---|
| 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 |
| Frequency of Operation | 125 kHz |
| Modulation Type | ASK (Amplitude Shift Keying) for write, AM/PM for read |
Key Features
- Fully integrated single-chip basestation for car immobilizer systems.
- Compatible with Philips transponder family (PCF79xx) and other 125 kHz transponders.
- Robust antenna coil power driver stage with modulator.
- Low-noise adaptive sampling time demodulator.
- Programmable filters, amplifier, and digitizer.
- Three-wire microcontroller interface for programming and bidirectional communication with transponders.
- Adaptive Sampling Time (AST) demodulation technique to extend system operation range.
- Power-on reset and power-down modes.
- Serial interface for command set execution (e.g., READ_TAG, WRITE_TAG_N).
Applications
- Car immobilizer systems.
- Read/write and read-only systems for vehicle security.
- Identification transponder systems.
- RFID applications requiring robust and reliable communication.
Q & A
- What is the PCF7991AT/1081/M,1 used for?
The PCF7991AT/1081/M,1 is used in car immobilizer systems to provide read and write access to identification transponders.
- What is the operating frequency of the PCF7991AT/1081/M,1?
The device operates at a frequency of 125 kHz.
- What type of modulation does the PCF7991AT/1081/M,1 use?
The device uses Amplitude Shift Keying (ASK) for write operations and Amplitude/Phase Modulation (AM/PM) for read operations.
- What is the package style of the PCF7991AT/1081/M,1?
The device comes in a SOIC-14 package.
- What is the operating temperature range of the PCF7991AT/1081/M,1?
The operating temperature range is -40°C to +85°C.
- Does the PCF7991AT/1081/M,1 have a power-on reset feature?
Yes, the device includes a power-on reset feature.
- How does the PCF7991AT/1081/M,1 communicate with microcontrollers?
The device uses a three-wire microcontroller interface for programming and bidirectional communication with transponders.
- What is the Adaptive Sampling Time (AST) demodulation technique used in the PCF7991AT/1081/M,1?
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.
- Can the PCF7991AT/1081/M,1 be used in other RFID applications?
Yes, the device can be used in various RFID applications requiring robust and reliable communication.
- Where can I find detailed information about the PCF7991AT/1081/M,1?
Detailed information can be found in the datasheet available from NXP's official website or through authorized distributors like Future Electronics, Octopart, and Ovaga Technologies.
