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Quad squib driver and dual sensor interface ASIC for safety application

Quantity $ per Unit Savings
1 - 9$6.820%
10 - 99$5.3621%
100 - 249$4.4135%
250 - 499$3.9642%
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Parameter NameParameter Value
Operating RangeAutomotive
Operating Voltage Min Volt6.5
Operating Voltage Max Volt35.0
Packing TypeTape And Reel
RoHs compliantEcopack2
Package NameLQFP 48 7x7x1.4 mm

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.

Key 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 VRESand 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 ?m)