hi-8424ptt Holt Integrated Circuits, Inc., hi-8424ptt Datasheet

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hi-8424ptt

Manufacturer Part Number
hi-8424ptt
Description
6-channel / 8-channel Discrete-to-digital Interface Sensing 28v / Open Signals
Manufacturer
Holt Integrated Circuits, Inc.
Datasheet
DESCRIPTION
The HI-8421 is a six channel discrete-to-digital interface
device.The HI-8424 has eight channels. Mixed-signal
CMOS technology is used to provide superior low-power
performance. The device inputs are configured to sense
28V / Open discrete signals. The device outputs are CMOS
/ TTL compatible and may be disabled (tri-state) using the
CE
The HI-8421 is a drop-in replacement for the DEI1054.
For added functionality, the Holt HI-8422 offers eight
channels of Open / Ground sensing and eight channels of
28V / Ground sensing in a single device.
BLOCK DIAGRAM
(DS8421 Rev. E)
March 2007
and
GND
V
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
OE
CE
OE
DD
pins.
3.6V Reference
66 K
66 K
66 K
66 K
66 K
66 K
66 K
66 K
29 K
29 K
29 K
29 K
29 K
29 K
29 K
29 K
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
6-Channel / 8-Channel Discrete-to-Digital Interface
HOLT INTEGRATED CIRCUITS
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
www.holtic.com
HI-8421, HI-8424
!
!
!
!
!
PIN CONFIGURATIONS
FEATURES
FUNCTION TABLE
6 or 8 independent 28V / Open sensing channels
Low power CMOS technology
Lightning protected inputs to DO-160D level 3
HI-8421 is a drop in replacement for DEI1054
5.0V single supply operation
Sensing 28V / Open Signals
Discrete
28 Volts
Open
Input
VDD 10
16-Pin Plastic SOIC package
X
X
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN1 1
IN2 2
IN3 3
IN4 4
IN5 5
IN6 6
OE
CE
OE
CE
20 Pin TSSOP package
7
8
1
2
3
4
5
6
7
8
9
(Narrow Body)
HI-8421PST
HI-8421PSI
HI-8424PTT
HI-8424PTI
CE
0
0
1
X
OE
X
16 GND
15 OUT1
14 OUT2
13 OUT3
12 OUT4
11 OUT5
10 OUT6
9 VDD
0
0
1
20 GND
19 OUT1
18 OUT2
17 OUT3
16 IN8
15 OUT4
14 OUT5
13 OUT6
12 OUT7
11 OUT8
Output
High Z
High Z
1
0
03/07

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hi-8424ptt Summary of contents

Page 1

... GND 15 OUT1 14 OUT2 HI-8421PSI 13 OUT3 HI-8421PST 12 OUT4 11 OUT5 10 OUT6 9 VDD (Narrow Body GND 2 19 OUT1 3 18 OUT2 4 17 OUT3 HI-8424PTI 5 16 IN8 HI-8424PTT 6 15 OUT4 7 14 OUT5 8 13 OUT6 9 12 OUT7 11 OUT8 CE OE Output High Z X ...

Page 2

... Volt / Open sensing input, channel 5 Discrete Input 28 Volt / Open sensing input, channel 6 Discrete Input 28 Volt / Open sensing input channel 7 Digital input Output Enable. OUT1-OUT8 are high-impedance if Digital input Chip Enable. OUT1-OUT8 are high-impedance if Power Positive supply voltage 5.0 V Tri-state output Logic output, channel 8 ...

Page 3

... Output disable time TIMING DIAGRAMS OUTx Output Enable Timing LIGHTNING PROTECTION The 28V / Open inputs will survive DO-160D level 3, wave- forms 3, 4 and 5A without external components. ORDERING INFORMATION HI - 842xxx x x HI-8421, HI-8424 SYMBOL CONDITION ...

Page 4

PLASTIC SMALL OUTLINE (SOIC (Narrow Body) .390 ± .004 (9.90 ± .10) .236 ±.008 Top View (5.99 ±.20) .0165 ± .003 (.419 ± .089) .050 BSC (1.27) BSC = “Basic Spacing between Centers” is theoretical true position ...

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