HI-8422 Datasheet, PDF (1/6 Pages) Holt Integrated Circuits – 16-Channel Discrete-to-Digital Interface Sensing 28 Volt / Open and Open / Ground Signals

April 2002
HI-8422
16-Channel Discrete-to-Digital Interface
Sensing 28 Volt / Open and Open / Ground Signals
DESCRIPTION
FEATURES
The HI-8422 is a sixteen channel discrete-to-digital _{! 8 independent 28 Volt / Open sensing channels}
interface device. The device has eight channels designed
to sense 28 V / Open signals and eight channels that sense _{! 8 independent Open / Ground sensing channels}
Open / Ground signals. Data is multiplexed from each bank
of sensors to an eight bit digital databus. Mixed-signal _{! 5.0 V single supply operation}
CMOS technology is used to provide superior low-power
performance. The device outputs are CMOS / TTL
compatible and may be disabled (tri-state) using the CE
and OE pins.
Y _{The HI-8422 is offered in a small footprint 32-pin Plastic}
Quad Flat Package (PQFP). Please contact the Holt sales
department for other packaging options.
! Low power CMOS technology
! Sense inputs are internally lightning protected per
DO-160D level 3
! Military processing options available
AR _{PIN CONFIGURATION}
IN _{FUNCTION TABLE}
28V
0V
A0 CE OE Output
IM ^{Inputs Inputs}
Open
X
1
0
0
1
28 Volts
X
1
0
0
0
L _X
Open 0
0
0
0
X
Ground 0
0
0
1
E _X
X
X
1
X High Z
PR ^X
X
X
X
1 High Z
28VIN3 - 1
0VIN3 - 2
28VIN4 - 3
0VIN4 - 4
28VIN5 - 5
0VIN5 - 6
28VIN6 - 7
0VIN6 - 8
24 - N/C
23 - D3
22 - N/C
21 - 0VIN8
20 - 28VIN8
19 - D4
18 - D5
17 - D6
32 Pin TQFP package
(DS8422 Rev. B)
HOLT INTEGRATED CIRCUITS
www.holtic.com
04/02