HI-8428-R

8-Channel Ground/Open or Supply/Open

Sensor with SPI Interface

GENERAL DESCRIPTION

FEATURES

The HI-8428-R is an 8-channel discrete-to-digital sensor

fabricated with Silicon-on-Insulator (SOI) technology

designed to interface with a Serial Peripheral Interface

(SPI).

Each input is individually configurable as either GND/Open

or Supply/Open (28V/Open). Discrete input thresholds and

hysteresis are compliant with Airbus ABD0100H

specification. In GND/Open mode, thresholds are set at

4.5V/10.5V, and in Supply/Open mode at 6V/12V.

The part operates from a 3.3V (+/- 5%) digital supply and

12V - 16.5V analog supply.

A 1mA wetting current is sourced from each SENSE input

when GND/Open mode is selected for that pin. The wetting

current serves to prevent dry relay or switch contacts.

All sense inputs are lightning protected to RTCA/DO160G,

Section 22 Level 3 Pin Injection Test Waveform Set A (3 &

4), Set B (3 & 5A) and Set Z (3 & 5B) when used with the

required external

resistors. Levels 4 and 5 lightning

protection can also be obtained by using the required

external 3k

series resistor and a TVS at each SENSE

input.

HI-8428-R is a drop-in replacement for the DEI1284.

3kΩ

Ω

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Pin Injection Test

Robust CMOS Silicon-on-Insulator (SOI) technology

Eight discrete inputs, individually configurable as

GND/Open or Supply/Open

Airbus ABD0100H specification compliant

MIL-STD-704 compliant

Sense inputs lightning protected to RTCA/DO1060G,

Section 22 Level 3

10MHz Serial Peripheral Interface (SPI) allows daisy-

chaining of parts for efficient board routing

Withstands inadvertent application of 115V AC/400Hz

power to Sense inputs.

Drop-in replacement for DEI1284

Internal Self-Test mode checks analog comparators

and logic

October 2015

16-Pin Plastic Small Outline

Narrow-body Package

PIN CONFIGURATION

APPLICATION

HOLT INTEGRATED CIRCUITS

(DS8428-R Rev. A)

10/15

www.holtic.com

HI-8428PSx-R

SENSE1 1

SENSE2 2

SENSE3 3

SENSE4 4

SENSE5 5

SENSE6 6

SENSE7 7

SENSE8 8

16 VDD

15 GND

14 VLOGIC

13 SEL

12 SI

11

10 SCK

9SO

CS