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Block diagram and pin description

1.1

Block diagram

The L9689E IC is an application specific standard component for airbag system chip. Its main functions include

deployment drivers (supporting both squib and low-energy actuator loads), remote sensor interfaces (supporting

PSI-5 satellite sensors), diagnostics, deployment arming through remote sensor SPI communication snooping,

hall-effect/switch sensor interfaces and general purpose output low-side drivers. A simplified block diagram for

this IC is shown in the Figure 1.

Figure 1. Block diagram

L9689E

Block diagram and pin description

DB4807 - Rev 2

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