GENERAL DESCRIPTION

The HI-8425 is a combined 8-channel discrete-to-digital sensor and quad low side driver fabricated with Silicon-on Insulator (SOI) technology for robust latch-up free operation. Sense detection can either be GND/Open or Supply/Open as configured by the SNSE_SEL pin. Supply/Open sensing is also referred to as 28V/Open sensing. The sensing circuit window comparator thresholds can be fixed at the internal programmed values or can be set externally at the HI_SET and LO_SET pins, as selected by the THS_SEL pin. The digital SENSE outputs can be tristated by taking the OE pin high.

FEATURES

Robust CMOS Silicon-on-Insulator (SOI) technology

8-channel Selectable Sense Operation, GND/Open or Supply/Open

Selectable Thresholds and Hysteresis

Sense Detection Range 3V to 22V

Logic Operation from 3.0V to 5.5V

Lightning Protected Sense Inputs

Airbus ABD0100H compliant

4 Low-Side 200 mA drivers

4.5 Ohm On Resistance

Over-Current Fault Detection Signaled by Logic Output

Max Power Dissipation Automatically Limited by Fault Protection

Diode Clamps for Discharging Inductive Loads

APPLICATIONS

Avionics Discrete to Digital Sensing

Relay Driver

Lamp driver

Discrete Signaling