IC MASTER 2001

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4075

Philips

Semiconductors

Transponders

Immobilization

Philips Semiconductors’ transponders meet the security and performance requirements of modern vehicle

immobilizer applications. Excellent device sensitivity (large distance) and short authentication time ensure easy

application and outstanding system performance.

Products

The following transponders have been specifically designed for car immobilizers where (re)programming of the

identification code or storage of additional data is required.

The PCF7936 (HITAG 2) is a programmable security transponder employing mutual authentication with encrypted

data transmission. It is ideally suited for vehicle immobilizer applications which require encrypted data transmission

between the basestation and the transponder.

The PCF7931AS (read only) and PCF7930AS (read/write) are immobilizer transponder sticks which transmit data

bi-directionally, in half-duplex mode, between the basestation and the transponder.

The PCF7935 (SECT) is a programmable security transponder employing challenge/response authentication and

is ideally suited for vehicle immobilizer applications, where encrypted data transmission between basestation and

transponder is required.

Product overview

Features

PCF7930AS

PCF7931AS

PCF7935AS

PCF7936AS

Data periodically read out in read only mode

Yes

Yes

Yes

Yes

Non-volatile user memory

768 bit

—

768 bit

128 bit

Operating frequency

125 kHz

125 kHz

125 kHz

125 kHz

Programmable read only operation

Yes

Yes

Yes

Yes

Programmable security transponder

—

—

Yes

Yes

64/32 bit mutual authentication

—

—

—

Yes

48/48 bit challenge/response authentication

—

—

Yes

—

32-bit unique device identification number

Yes

Yes

Yes

Yes

Secret key

—

—

128 bit

48 bit

Fast authentication

—

—

—

39 ms

EEPROM read/write protection capabilities

Yes

Yes

Yes

Yes

Read only modes for downwards compatibility

Yes

Yes

Yes

Yes

Data retention

20 years

20 years

20 years

20 years

Extended temperature range

–40 to +85

°C

–40 to +85

°C

–40 to +85

°C

–40 to +85

°C

Leadless stick plastic package

SOT385

SOT385

SOT385

SOT385