DESCRIPTION
The HI-8470 is a sixteen channel discrete-to-digital interface device. The IC has 16 channels which can sense Open/Ground or 28V/Open signal levels. The voltage threshold of the sensors is user programmable with external resistors. Sense input thresholds may also be set to CMOS logic levels to interface the part with other sensors, for example an externalADC or resolver.

FEATURES
 • Pin programmable - requires no MCU or software control (no need for DO-178 certification)
 • Robust CMOS Silicon-on-Insulator (SOI) technology
 • 16 threshold-selectable discrete input channels
 • Programmable Thresholds and Hysteresis
 • Sense Detection Range 3V to 22V
 • On-chipARINC 429 Transmitter and Line Driver
 • 3.3 V single supply operation
 • Pin programmable transmit repetition rate
 • Internal lightning protection circuitry for both discrete sense lines and line driver allows compliance with RTCA/DO-160G, Section 22 Level 3 Pin Injection Tests.
 • Adjustable sense thresholds
 • DO-254 certifiable