HI-8420
October 2001
DESCRIPTION
The HI-8420 is a six channel discrete-to-digital interface
device. Mixed-signal CMOS technology is used to provide
superior low-power performance. The HI-8420 has six
separate Open / Ground sensing inputs. The device
outputs are CMOS / TTL compatible and may be disabled
(tri-state) using the CE and OE pins.
The device is a drop-in replacement for the DEI1026. 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.
The HI-8420 is offered in a small footprint 16-pin plastic
package. Please contact the Holt sales department for
other packaging options.
PIN CONFIGURATION
IN1
IN2
IN3
IN4
IN5
IN6
OE
CE
1
2
3
4
5
6
7
8
16
15
14
GND
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
V
DD
HI-8420PS
13
12
11
10
9
16-Pin Plastic SOIC package
(Narrow Body)
FEATURES
!
!
!
!
!
Six independent Open / Ground sensing channels
5.0V single supply operation
BLOCK DIAGRAM
OE
Low power CMOS technology
Military processing options available
Drop in replacement for DEI1026
CE
V
DD
IN1
5K
9K
+
-
OUT1
IN2
5K
9K
+
-
OUT2
IN3
5K
9K
+
-
OUT3
FUNCTION TABLE
Discrete
Input
Open
Ground
X
X
CE
0
0
1
X
OE
0
0
X
1
Output
IN4
5K
9K
+
-
OUT4
5K
9K
IN5
+
-
OUT5
0
1
High Z
High Z
5K
9K
IN6
+
-
9K
5K
3.25V Reference
OUT6
GND
(DS8420 Rev. New)
HOLT INTEGRATED CIRCUITS
www.holtic.com
10/01
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
