PCF7935AS NXP Semiconductors, PCF7935AS Datasheet
PCF7935AS
Manufacturer Part Number
PCF7935AS
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PCF7935AS.pdf
(1 pages)
Available stocks
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Company:
Part Number:
PCF7935AS
Manufacturer:
RENESAS
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1 560
Philips Semiconductors
Product Profile
Security Transponder, SECT
Features
Block Diagram
June 1998
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
L
C
Contactless Interface
Power-On Reset
Clock Recovery
Voltage Limiter
Demodulator
Modulator
Rectifier
PCF7935AS
Transponder IC
Calculation Unit
Data Acqusition
Control Logic
Access Control
EEPROM
EEPROM
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 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 field
generated by the basestation.
The transponder is assembled in a small leadless stick
shaped plastic package.
Stick Package Outline
4,9-5,1
11,9-12,1
A
PCF7935AS
A
All Dimensions [mm]
Cross Section A-A
( without Scale )
1,9-2,1
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