Transponder chip PCF7935AS
General Description:
The PCF7935, SECT is a programmable Security
Transponder employing challenge/response
authentication ideally suited for contactless
authentication and memory access between a
basestation and the transponder.
The SECT features a powerful security algorithm for
vehicle immobiliser applications. The device is fully
compatible with the PCF7931 read only and PCF7930
read/write transponder family, providing means for
downward compatibility.
The PCF7935 using in many car immo systems such as BMW, Mercedes Benz and others.
Features:
- Programmable Security Transponder
- 48/48 bit challenge/response authentication
- Powerful security algorithm
- 128 bit Secret Key
- 32 bit device identification number
- 768 bit non-volatile user memory (EEPROM)
- EEPROM read/write protection capabilities
- Fully compatible with PCF7931/30 family
- 20 year EEPROM data retention
- Leadless stick shaped plastic package
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