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Octal squib driver and quad Manchester/PSI5 encoded sensor interface ASIC for safety application

Quantity $ per Unit Savings
1 - 9$9.420%
10 - 24$8.5110%
25 - 99$8.1014%
100 - 249$7.0525%
250 - 499$6.7229%
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Parameter NameParameter Value
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius95.0
Operating Voltage Min Volt7.0
Operating Voltage Max Volt37.0
Packing TypeTape And Reel
RoHs compliantEcopack2
Package NameLQFP 64 10x10x1.4 mm

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.

Key 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