Freescale Semiconductor

Data Sheet: Product Preview

Document Number: SC33690DS

Rev. 5, 02/2007

© Freescale Semiconductor, Inc., 2007. All rights reserved.

This document contains information on a product under development. Freescale reserves the

right to change or discontinue this product without notice.

MC33690

SOIC-20

The standalone tag reader circuit (STARC) is an integrated

circuit dedicated to the automotive immobilizer applications.

It combines the antenna drivers and demodulator necessary to

interface with a transponder.

A low dropout voltage regulator and a physical interface fully

compatible with the ISO 9141 norm are also available.

The STARC is fabricated with the SMARTMOSTM3.5

technology. This process is a double layer metal 1.4µm

45V technology, combining CMOS and bipolar devices.

• Contactless 125 kHz tag reader module:

– Self synchronous sample and hold demodulator

– Amplitude or phase modulation detection

– High sensitivity

– Fast read after write demodulator settling time

– Low resistance and high current antenna drivers, 2W @

150mA (typ.)

– Bidirectionnal data transmission

– Multi-tag, multi-scheme operation

• Low dropout voltage regulator:

– Wide input supply voltage range from 5.5V up to 40V

– Output current capability up to 150mA DC with an

external power transistor

– 5V output voltage with a

±5% accuracy

– Low voltage reset function

– Low current consumption in standby mode:

– 300µA (typ.)

• ISO 9141 transmitter and receiver module:

– Input voltage thresholds ratiometric to the supply

voltage

– Current limitation

– Output slew rate control

– No external protection device required

MC33690 Standalone Tag

Reader Circuit

SOURCE

TD1

VDD

TD2

XTAL2

XTAL1

AM

K

Rx

Tx

1

2

3

7

4

5

6

8

13

12

11

10

9

14

VSS

VSUP

GATE

15

16

17

20

19

18

MODE1

MODE2

RD

LVR

DOUT

AGND

CEXT

Pin Connections

ORDERING INFORMATION

Device

Operating

Junction

Temperature

Range

Package

MC33690DW

MC33690DWE

TJ = −40°C to

125°C

TJ =

−40°C to

125°C

SOIC 20

SOIC 20

(ROHS)