L9634 Datasheet, PDF (1/36 Pages) STMicroelectronics – SQUIB RESISTANCE MEASUREMENT

L9634
OCTAL INTELLIGENT SQUIB DRIVER ASIC
PRELIMINARY DATA
1 FEATURES
Figure 1. Package
■ EIGHT SQUIB DEPLOYMENT DRIVERS
■ DEPLOYMENT CURRENT AND TIME
PROGRAMMABLE VIA SPI, (1.2A/2ms AND
1.75A/4ms)
t(s) ■ CAPABILITY TO DEPLOY WITH 1.47A (2.14A)
UNDER 40V (21V) LOAD-DUMP CONDITION
c _{AND THE LOW SIDE MOS SHORTED TO -1V.}
u _{■ 5.5MHZ SPI INTERFACE WITH MESSAGE}
rod ^VALIDATION
■ 4 CHANNELS OF DISCRETE/SERIAL LOGIC
P _{ARMING INTERFACE PROGRAMMABLE VIA}
te ^SPI
le ^{■ DEPLOYMENT DRIVER SELF-}
o DIAGNOSTICS:
s _{– SHORT TO BATTERY/GROUND AND}
b _{OPEN CIRCUIT}
O _{– SQUIB RESISTANCE MEASUREMENT}
) ^- – SHORT BETWEEN CHANNELS DETEC-
t(s ^TIONS
c ^{– HIGH AND LOW SIDE MOS TESTS}
u _{– GROUND LOSS DETECTION}
d _{■ -40 °C TO +85 °C OPERATING AMBIENT}
ro TEMPERATURE
P _{■ 4KV ESD CAPABILITY ON ALL OUTPUT-}
Obsolete ^{DRIVER PINS AND 2KV ON ALL OTHERS}
TQFP44
Table 1. Order Codes
Part Number
L9634
Package
TQFP44
2 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
October 2004
Rev. 1
1/36
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.