PCF7941ATJ/CA1B00E

RF Transmitter Overview

The PCF7941ATJ/CA1B00E is a high-performance single-chip security transponder and RISC controller designed for automotive immobilization and remote keyless entry applications. It integrates a 32-bit unique device ID, 512-byte EEPROM, and a package-integrated LF coil. The device operates on a single lithium cell with a supply voltage range of 2.1V to 3.6V. It features a hardwired security algorithm supporting 48 or 96-bit secret keys, fast mutual authentication in 39ms, and an 8-bit RISC architecture with up to 4KB ROM and 128 bytes RAM.

RF Transmitter Feature Summary

• Integrates security transponder functionality with a RISC controller for combined vehicle immobilization and remote keyless entry solutions
• Features a package-integrated transponder LF coil eliminating external antenna components
• Supports fast mutual authentication using hardwired security algorithms with configurable secret key lengths

RF Transmitter Applications

• Automotive vehicle immobilization systems
• Remote keyless entry (RKE) transponders
• Security transponder identification modules

RF Transmitter Procurement Notes

Verify component authenticity through official NXP channels due to obsolete status. Confirm package integrity and lead condition prior to installation. Cross-reference datasheet revisions to ensure compatibility with existing firmware libraries. Validate supply voltage requirements against system design specifications before procurement.

RF Transmitter Selection Notes

Select this component for applications requiring integrated LF coil and RISC programmability within a single package. Ensure the system supports the required 2.1V to 3.6V operating range. Consider the 512-byte EEPROM capacity for extended data storage needs. Verify that the 36-BSSOJ package dimensions fit the target PCB layout constraints.

RF Transmitter Part Context

This part belongs to the PCF7x41ATJ series, which provides combined security transponder and microcontroller capabilities. It is designed specifically for automotive environments, offering robust security features and low power consumption modes including run, idle, and power-down states suitable for battery-operated key fobs.

RF Transmitter Replacement Considerations

This product is listed as obsolete and no longer manufactured. No direct public substitute part numbers are confirmed in official documentation. Evaluate legacy stock availability or consult NXP for recommended alternative families with compatible pinouts and security features.