hi-8422 Holt Integrated Circuits, Inc., hi-8422 Datasheet

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hi-8422

Manufacturer Part Number
hi-8422
Description
16-channel Discrete-to-digital Interface
Manufacturer
Holt Integrated Circuits, Inc.
Datasheet
DESCRIPTION
The HI-8422 is a sixteen channel discrete-to-digital
interface device. The device has eight channels designed
to sense 28 V / Open signals and eight channels that sense
Open / Ground signals. Data is multiplexed from each bank
of sensors to an eight bit digital databus. Mixed-signal
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
and
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.
(DS8422 Rev. F)
FUNCTION TABLE
March 2007
28 Volts
Inputs
Open
28V
OE
X
X
X
X
pins.
Ground
Inputs
Open
0 V
X
X
X
X
A0
X
X
1
1
0
0
Sensing 28 Volt / Open and Open / Ground Signals
CE
X
0
0
0
0
1
OE
X
0
0
0
0
1
HOLT INTEGRATED CIRCUITS
Output
High Z
High Z
1
0
0
1
16-Channel Discrete-to-Digital Interface
www.holtic.com
CE
!
!
!
!
!
!
FEATURES
8 independent 28 Volt / Open sensing channels
8 independent Open / Ground sensing channels
Low power CMOS technology
Sense inputs are internally lightning protected per
DO-160D level 3
Military processing options available
5.0 V single supply operation
PIN CONFIGURATION
28VIN3 - 1
28VIN4 - 3
28VIN5 - 5
28VIN6 - 7
0VIN3 - 2
0VIN4 - 4
0VIN5 - 6
0VIN6 - 8
32 Pin PQFP package
HI-8422PQT
HI-8422PQI
&
HI-8422
24 - N/C
23 - D3
22 - N/C
21 - 0VIN8
20 - 28VIN8
19 - D4
18 - D5
17 - D6
03/07

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hi-8422 Summary of contents

Page 1

... The device outputs are CMOS / TTL compatible and may be disabled (tri-state) using the and OE pins. 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. FUNCTION TABLE 28V ...

Page 2

... Discrete Input 31 28VIN2 Discrete Input 32 0VIN2 Discrete Input HI-8422 DESCRIPTION 28 Volt / Open sensing input, channel 3 Open / Ground sensing input, channel 3 28 Volt / Open sensing input, channel 4 Open / Ground sensing input, channel 4 28 Volt / Open sensing input, channel 5 Open / Ground sensing input, channel 5 ...

Page 3

... 28VIN4 28VIN5 28VIN6 28VIN7 28VIN8 0VIN1 5 K 0VIN2 5 K 0VIN3 5 K 0VIN4 5 K 0VIN5 5 K 0VIN6 5 K 0VIN7 5 K 0VIN8 GND A0 HI-8422 + - + - + - + - + - + - + - + - 8 x 2:1 MUX ...

Page 4

... Input current Input sink Input source OUTPUTS Logic output voltage Logic output voltage (CMOS) Tri-state output current SUPPLY CURRENT V current DD HI-8422 RECOMMENDED OPERATING CONDITIONS Supply Voltage -0 -0 +5.5 V VDD .................................. 4 5.5 V Operating Temperature Range - Industrial Screening ......... - 350 mW Hi-Temp Screening ........ 275° ...

Page 5

... Output Enable Timing LIGHTNING PROTECTION The HI-8422’s 28V / Open Sensing inputs will survive light- ning testing to DO-160D, Level 3 waveforms 3, 4 and 5A without external components. The Open / Ground inputs will survive waveforms 3 and 4 without external components. In order to guarantee survival to waveform 5A an external se- W ries resistor of at least 3 ...

Page 6

PIN PLASTIC QUAD FLAT PACK (PQFP) .354 BSC SQ (9.00) See Detail A .063 max (1.60) BSC = “Basic Spacing between Centers” is theoretical true position dimension and has no tolerance. (JEDEC Standard 95) PACKAGE DIMENSIONS .0057 .002 ± ...

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