Philips Semiconductors
Product Profile
PCF7935AS
June 1998
Security Transponder, SECT
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
General Descriptionprofile中文
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 PCF7930read/write transponder family, providing means for downward compatibility.
The transponder features 1152 bit of non-volatile
memory (EEPROM) from which 768 bit are reserved for user data storage. User data and configuration data may be exchanged in password mode for advanced pre-personalisation techniques. Memory access flags and a 56 bit password enable read and/or write protection of data.
The SECT performs a 48 bit challenge/response authentication, employing a 128 bit Secret Key. In addition the SECT supports a 32 bit device identification number.
The transponder power supply and system clock is derived from the magnetic component of the RF fie
ld generated by the basestation.
The transponder is assembled in a small leadless stick shaped plastic package.
Block Diagram
Stick Package Outline
元器件交易网b2b

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