HI-8421 Datasheet, PDF (1/4 Pages) Holt Integrated Circuits – six channel discrete-to-digital interface

HI-8421
October 2001
DESCRIPTION
The HI-8421 is a six channel discrete-to-digital interface
device. Mixed-signal CMOS technology is used to provide
superior low-power performance. The HI-8421 has six
separate 28 Volt / open 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 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.
The HI-8421 is offered in a small footprint 16-pin plastic
package. Please contact the Holt sales department for
other packaging options.
PIN CONFIGURATION
IN1 1
IN2 2
IN3 3
IN4 4
IN5 5
IN6 6
OE 7
CE 8
HI-8421PS
16 GND
15 OUT1
14 OUT2
13 OUT3
12 OUT4
11 OUT5
10 OUT6
9 VDD
16-Pin Plastic SOIC package
(Narrow Body)
FEATURES
BLOCK DIAGRAM
! Six independent 28 Volt / Open sensing channels
! 5.0 V single supply operation
! Low power CMOS technology
! Military processing options available
! Drop in replacement for DEI1054
FUNCTION TABLE
Discrete
Input
Open
28 Volts
X
X
CE
OE
Output
0
0
1
0
0
0
1
X
High Z
X
1
High Z
VDD
OE
CE
IN1
IN2
IN3
IN4
IN5
IN6
GND
3.6V Reference
+
66 K
-
29 K
+
66 K
-
29 K
+
66 K
-
29 K
+
66 K
-
29 K
+
66 K
-
29 K
+
66 K
-
29 K
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
(DS8421 Rev. New)
HOLT INTEGRATED CIRCUITS
www.holtic.com
10/01