PCF7941ATS/3391/2A

RF Transmitter Overview

The PCF7941ATS/3391/2A is a security transponder and RISC controller manufactured by NXP Semiconductors. It integrates a PLL-based modulator/demodulator for LF immobilizer communication and supports remote keyless entry functions. The device features an integrated EEPROM for data storage and a RISC core for cryptographic operations. It is housed in a 20-lead SSOP package, designed for automotive anti-theft systems requiring high reliability and secure authentication protocols.

RF Transmitter Feature Summary

• Integrates a RISC controller with cryptographic capabilities for secure data processing
• Includes built-in PLL modulator and demodulator for low-frequency immobilizer signaling
• Features non-volatile EEPROM memory for storing vehicle-specific identification codes

RF Transmitter Applications

• Automotive immobilizer systems
• Remote keyless entry (RKE) transponders
• Vehicle anti-theft security modules

RF Transmitter Procurement Notes

Verify the specific suffix /3391/2A against the official NXP datasheet to confirm tape-and-reel packaging specifications and environmental compliance status. Ensure the component matches the required pinout and firmware version for your target application. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability before finalizing procurement orders.

RF Transmitter Selection Notes

Select this component for applications requiring integrated LF immobilizer and RKE functionality within a single chip. It is suitable for designs needing on-chip cryptographic processing and EEPROM storage. Consider the 20-SSOP package constraints for PCB layout. Verify compatibility with existing vehicle bus architectures and ensure the operating voltage range meets system requirements.

RF Transmitter Part Context

This part belongs to the PCF794x family of security transponders from NXP Semiconductors. These devices are widely used in automotive industries for passive anti-theft systems. The PCF7941 variant specifically combines immobilizer and remote control functions, offering a compact solution for modern vehicle security architectures compared to discrete component implementations.

RF Transmitter Replacement Considerations

Public confirmed substitute part numbers: PCF7941ATJ.