TMS37F128 datasheet(5/10 Pages) TI1

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TMS37F128

www.ti.com

SCBS878 – APRIL 2012

Operating Characteristics

Part Number

TMS37F128D3IDBTRG4

Features

Immobilizer plus microcontroller with integrated power management

DST80 authentication logic

80-bit key length, 5-byte challenge, 3-byte signature

Mutual authentication: 65 ms

DST80 authentication time

Fast authentication: 42 ms

Microcontroller

16-bit RISC ultra-low power based on MSP430F1232 core

Supply voltage (VBAT)

1.8 V to 3.6 V

Active current consumption

300

μA (typ) (VCC = 2.2 V, fosc= 1 MHz, microcontroller active)

3.9

μA (typ) (three channels wake pattern active, microcontroller in LPM4, VCC = 3 V, TA =

Standby current consumption

25°C)

Transponder

Transmission Principle

HDX (half-duplex telegram protocol)

134.2 kHz

Operating Frequency

Integrated resonant frequency trimming capability via LF or Test interface

Security

Challenge/response, mutual authentication

Downlink

100% AM, PPM Bit coding with 2 kbit/s (typ)

Uplink

FSK modulation with 7.9 kbit/s (typ)

91-byte free available EEPROM user memory

EEPROM memory

133 bytes

32-bit unique serial number

EEPROM endurance

200 000 cycles (TA = 25°C) (min)

Clock reference for microcontroller

Resonant circuit can be used as clock reference for the microcontroller

Battery charge

Integrated battery charge functionality

Key learn-in

Special selective addressing to provide secure learn-in procedure

3D Wakeup Receiver

Sensitivity

4.2 mVpp (typ), 2.7 mVpp (min), 5.1 mVpp (max) (VCC = 2.8 V, TA = 25°C)

Sensitivity tuning

Separate for each channel and each wake pattern

Operating frequency

120 kHz to 140 kHz

Resonant frequency trimming

Separate for each channel

Wake pattern

Two independent wake patterns with selectable length: 0, 4, 8 or 16 bits

Microcontroller

Memory

8KB program memory, 256-byte RAM

User data flash memory

256-byte information memory

Flash program and erase endurance

100 000 cycles (typ) (TA = 25°C)

Flash data retention

10 years (min) (TA = 25°C)

Program, erase, read supply voltage

2.7 V (min)

I/O ports

Operating temperature

-40°C to 85°C

Package

44-pin TSSOP (DBT)

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