L9654 datasheet(1/59 Pages) STMICROELECTRONICS

Numer części	L9654

Szczegółowy opis	Quad squib driver and dual sensor interface ASIC for safety application

PDF	59 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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1 / 59 page

This is information on a product in full production.

November 2013

DocID14218 Rev 3

1/59

L9654

Quad squib driver and dual sensor interface

ASIC for safety application

Datasheet

- production data

LQFP48

Features

 4 deployment drivers sized to deliver 1.2 A

(min) for 2 ms (min) and 1.75 A (min) for

1ms (min).

 Independently controlled high-side and low-

side MOS for diagnosis

 Analog output available for resistance

 Squib short to ground, short to battery and

MOS diagnostic available on SPI register

 Capability to deploy the squib with 1.2 A (min.)

or 1.75 A under 35 V load-dump condition and

the low-side MOS is shorted to ground

 Capability to deploy the squib with 1.2 A (min.)

at 6.9 V VRES and 1.75 A at 12 V VRES.

 Interface with 2 satellite sensors

 Programmable independent current trip points

for each satellite channel

 Support Manchester protocol for satellite

sensors

 Supports for variable bit rate detection

 Independent current limit and fault timer

shutdown protection for each satellite output

 Short to ground and short to battery detection

and reporting for each satellite channel

 5.5 MHz SPI interface

 Satellite message error detection

 Low voltage internal reset

 2 kV ESD capability on all pins

 Package: 48 lead LQFP

 Technology: ST Proprietary BCD5s (0.57 μm)

Description

L9654 is intended to deploy up to 4 squibs and to

interface up to 2 satellites.

Squib drivers are sized to deploy 1.2 A (min.) for

2 ms (min.) during load dump and 1.75 A (min.)

for 1 ms (min.) during load dump.

Diagnostic of squib driver and squib resistance

measurement is controlled by micro controllers.

Satellite interfaces support Manchester decoder

with variable bit rates.

Table 1. Device summary

Order code

Package

Packing

L9654

LQFP48

Tray

L9654TR

LQFP48

Tape and reel

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