L9662 Datasheet, PDF (1/80 Pages) STMicroelectronics – Octal squib driver and quad Manchester/PSI5 encoded sensor

L9662
Octal squib driver and quad Manchester/PSI5 encoded sensor
interface ASIC for safety application
Datasheet - production data
'!0'03
LQFP64 (10x10x1.4mm)
Features
 8 deployment drivers with SPI selectable firing
current and times
 Capability to deploy the squib with 1.2 A
(min)/2 ms, 1.75 A (min)/1.0 ms and 1.75 A
(min)/0.65 ms between VRES of 7 V to 37 V
 Capability to deploy the squib with 1.5 A
(min)/2 ms between VRES of 7 V to 25 V
 Firing capability to deploy all channels
simultaneously
 Independently controlled high-side and low-
side MOS for diagnosis
 Analog output available for resistance
measurement
 Squib short to ground, short to battery and
MOS diagnostic available on SPI register
 Capability to deploy the squib the low side
MOS is shorted to ground
 4 Fire enable inputs
 Interface with 4 satellite sensors
 Programmable independent current trip points
for each satellite channel
 Support Manchester 1 or 2 protocol for satellite
sensors
 Support PSI5 (Parity) protocol for satellite
sensors (reference PSI5 technical specification
V 1.2 /14.06.07)
 Support for Sync pulse and minibus for satellites
 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
 2 independent SPI interfaces
 5.5 MHz SPI interface
 Satellite message error detection
 Hall effect sensor support on satellite channels
3 and 4.
 Low voltage internal reset
 2 kV ESD capability on all pins
 Package: LQFP64
 Technology: ST Proprietary BCD5
Description
The device is intended to deploy up to 8 squibs
and to interface up to 4 satellites. 2 satellite
interfaces can be used to interface Hall sensors.
Squib drivers are sized to deploy 1.2 A minimum
for 2 ms, 1.75 A minimum for 1 ms and 1.75 A
minimum for 0.65 ms during load dump along with
1.5 A minimum for 2 ms for VRES voltages less
than 25 V.
Full diagnostic capabilities of the squib interface
are provided. Satellite interfaces support
Manchester 1, 2 and PSI5 decoding with variable
bit rate.
Order code
L9662
L9662TR
Table 1. Device summary
Amb. temp range, C
Package
-40 to +85
LQFP64
Packing
Tray
Tape & Reel
September 2015
This is information on a product in full production.
DocID028325 Rev 1
1/80
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