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L9634

October 2004

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

1

FEATURES

PROGRAMMABLE VIA SPI, (1.2A/2ms AND

1.75A/4ms)

UNDER 40V (21V) LOAD-DUMP CONDITION

AND THE LOW SIDE MOS SHORTED TO -1V.

VALIDATION

ARMING INTERFACE PROGRAMMABLE VIA

SPI

DIAGNOSTICS:

– SHORT

TO

BATTERY/GROUND

AND

OPEN CIRCUIT

– SQUIB RESISTANCE MEASUREMENT

– SHORT BETWEEN CHANNELS DETEC-

TIONS

– HIGH AND LOW SIDE MOS TESTS

– GROUND LOSS DETECTION

TEMPERATURE

DRIVER PINS AND 2KV ON ALL OTHERS

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DESCRIPTION

The L9634 is an Octal Intelligent Squib Driver

ASIC. It is packaged in a 44pin Thin Quad Flat

Pack (TQFP) package and designed using ST's

proprietary BCD4 technology. The UH30 is intend-

ed to deploy up to eight airbag squib circuits and

provide diagnostics for each of the deployment

drivers. Each of the eight drivers is sized to deliver

up to 1.75A minimum for up to 4ms. The deploy-

ment current and time are both programmable via

the SPI port

PRELIMINARY DATA

OCTAL INTELLIGENT SQUIB DRIVER ASIC

Rev. 1

Figure 1. Package

Table 1. Order Codes

Part Number

Package

L9634

TQFP44

TQFP44

Obsolete

Product(s)

- Obsolete

Product(s)