HI-8428 Datasheet, PDF (1/16 Pages) Holt Integrated Circuits – MIL-STD-704 compliant

October 2015
HI-8428
8-Channel Ground/Open or Supply/Open
Sensor with SPI Interface
GENERAL DESCRIPTION
The HI-8428 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 ADB0100H
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 internally 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)
without the use of any external components.
HI-8428 is a drop-in replacement for the DEI1282.
APPLICATION
· Avionics Discrete to Digital Sensing
FEATURES
· 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.
· Internal Self-Test mode checks analog comparators
and logic
· Drop-in replacement for DEI1282
PIN CONFIGURATION
SENSE1 1
SENSE2 2
SENSE3 3
SENSE4 4
SENSE5 5
SENSE6 6
SENSE7 7
SENSE8 8
HI-8428PSx
16 VDD
15 GND
14 VLOGIC
13 SEL
12 SI
11 CS
10 SCK
9 SO
16-Pin Plastic Small Outline
Narrow-body Package
(DS8428 Rev. A)
HOLT INTEGRATED CIRCUITS
www.holtic.com
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