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 lowside 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.