Controller Entry Transponder IC

TMS37C136 / TMS37F136

The Controller Entry Transponder (CET) combines a low-power

16bit microcontroller with the proven TI DST+ transponder plus a

sophisticated power management; it is the ideal device for Remote

Keyless Entry applications for automotive.

Base station

in the car

TMS

37C136

Identification

device

LF

UHF

UHF

receiver

LF Trans-

ceiver

Control

Unit

The embedded DST+ transponder offers a high level of security

through its encryption, mutual authentication and after-theft

diagnosis features; it operates without battery. The low-power

microcontroller MSP430 offers a 16bit RISC architecture, 8kByte

ROM and 11 I/O ports. The power management features battery

charge and battery check functions, which can be used for

charging of the battery through the transponder LF field.

The CET is available as flash (TMS37F136) and ROM (TMS37C136) version.

Specifications:

Part Number

TMS 37C136

Features

Immobilizer plus micro controller plus power management

Immobilizer compatible to DST+ (E9WK )

16bit RISC ultra low-power microcontroller MSP430

Battery Check / Charge function

Supply Voltage

1.8 … 3.6 V

Current consumption

Transponder

Transmission Principle

HDX (Half Duplex), FDX ( Full Duplex using amplitude Modulation)

Operating Frequency

134.2 kHz

Security

TI Challenge/Response, Mutual Authentication, Secure Issuer Access Mode

Modulation Downlink (to the TRP)

100% AM, Bit Coding PWM or PPM

Datarate Downlink

PWM: typ. 1,3kBit / PPM: typ. 2kBit

EEPROM Memory

127Byte (lockable) for User data, 25Byte for Encryption Keys, serial#, configuration

Microcontroller

Memory

8kByte ROM, 256Byte RAM

I/O ports

11

Other

On Chip Oscillator (accuracy +/- 4%)

Operating Temperature

-40 to +85

°C

Storage Temperature

-40 to +125

°C

Package

30 Pin TSSOP DBT

For more information, contact the sales office or distributor nearest you. This contact information can be found

on our web site at:

http://www.ti-rfid.com

Texas Instruments reserves the right to change its products and services at any time without notice. TI provides customer assistance in various

technical areas, but does not have full access to data concerning the uses and applications of customers products. Therefore, TI assumes no

responsibility for customer product design or for infringement of patents and/or the rights of third parties, which may result from assistance

provided by TI.

© Copyright 2002 Texas Instruments Incorporated.

Data Sheet: 11-0-22-006 11/03