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.