Features
• AEC-Q100 qualified
• Squib/Pyroswitch deployment drivers
– 8-channel HSD/LSD
– 25 V maximum deployment voltage
– Various deployment profiles
– Current monitoring Rmeasure, STB, STG and leakage diagnostics
– High- and low-side driver FET tests
• Four-channel remote sensor interface
– PSI-5 satellite sensors
– Configurable asynchronous/synchronous protocols
• Configurable arming input signals
• Temperature sensor
• 32-bit SPI communications
– 2 SPI buses (1 global, 1 for satellite communication)
– Parity bit
• Integrated ADC measurements (1 ADC converter)
• Operating temperature: -40 °C to 105 °C
• Package - 48 pin

Description
The L9679E is an extension chip in airbag systems or a pyroswitch manager. This
device is family-compatible with the L9679 and L9680 devices. The device includes
an octal driver for squib/pyroswitch deployments and a quad channel interface for
PSI-5 sensors. Deployment profiles can be set according to user specifications via
SPI configuration, as well as the protocol to be used to communicate with the satellite
sensors. Independent configurable arming inputs are provided for a programmable
mapping of the loops to be deployed.

Applications
• Airbag systems
• Cut-off battery systems
• Pyro Fuse/Pyroswitch management