L9654 Datasheet | STMicroelectronics

Quad squib driver and dual sensor interface ASIC for safety application - production data - Support Manchester protocol for satellite sensors - Supports for variable bit rate detection - Independent current limit and fault timer shutdown protection for each satellite output - $3- 36 LQFP48 - Short to ground and short to battery detection and reporting for each satellite channel - 5.5 MHz SPI interface 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 - Satellite message error detection - Low voltage internal reset - 2 k V ESD capability on all pins - Package: 48 lead LQFP - Technology: ST Proprietary BCD5s (0.57 μm) Description - Squib short to ground, short to battery and MOS diagnostic available on SPI register L9654 is intended to deploy up to 4 squibs and to interface up to 2 satellites. - 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 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. Table 1. Device summary Order...