Original Creation Date: 01/18/96
Last Update Date: 09/08/99
Last Major Revision Date:
MNDS7820A-X REV 0A0
MICROCIRCUIT DATA SHEET
DUAL LINE RECEIVER
General Description
The DS7820A is a improved performance digital line receiver with two completely
independent units fabricated on a single silicon chip. Intended for use with digital
systems connected by twisted pair lines, it has a differential input designed to reject
large common mode signals while responding to small differential signals. The output is
directly compatible with TTL or LS integrated circuits.
The response time can be controlled with an external capacitor to eliminate noise spikes,
and the output state is determined for open inputs. Termination resistors for the twisted
pair line are also included in the circuit. The DS7820 is specified, worst case, over it's
full operating temperature range, for + 10-percent supply voltage variations and over the
entire input voltage range.
NS Part Numbers
DS7820AJ/883
DS7820AW-MLS
Industry Part Number
DS7820A
Prime Die
DS7820
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1
Static tests at
+25
2
Static tests at
+125
3
Static tests at
-55
4
Dynamic tests at
+25
5
Dynamic tests at
+125
6
Dynamic tests at
-55
7
Functional tests at
+25
8A
Functional tests at
+125
8B
Functional tests at
-55
9
Switching tests at
+25
10
Switching tests at
+125
11
Switching tests at
-55
1
MNDS7820A-X REV 0A0
MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETER
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC:
Vcc = 5V
SYMBOL
PARAMETER
CONDITIONS
NOTES
PIN-
NAME
MIN
MAX
UNIT
SUB-
GROUPS
Voh
Logical "1"
Output Voltage
Vcc=4.5V, In-=0V, In+=1V, Strobe=4.5V,
Iout=-400uA
2.5
5.5
V
1, 2,
3
Vol
Logical "0"
Output Voltage
Vcc=4.5V, In-=1V, In+=0V, Strobe=4.5V,
Iout=16mA
0.4
V
1, 2,
3
Iil (str)
Strobe Input
Current
Vcc=5.5V, In-=3V, In+=0V, Strobe=0.4V
-1.4
mA
1, 2,
3
Iih (str)
Strobe Input
Current
Vcc=4.5V, In-=0V, In+=+3V, Strobe=5.5V
5
uA
1, 2,
3
Iin+
Non-Inverting
Input Current
Vcc=4.5V, In-=15V, In+=15V, Strobe=0V
7
mA
1, 2,
3
Vcc=5.5V, In-=0V, In+=0V, Strobe=0V
-1.6
mA
1, 2,
3
Vcc=5.5V, In-=-15V, In+=-15V,
Strobe=0V
-9.8
mA
1, 2,
3
Iin-
Inverting Input
Current
Vcc=4.5V, In-=15V, In+=15V, Strobe=0V
4.2
mA
1, 2,
3
Vcc=5.5V, In-=0V, In+=0V, Strobe=5.5V
-0.5
mA
1, 2,
3
Vcc=5.5V, In-=-15V, In+=-15V,
Strobe=5.5V
-4.2
mA
1, 2,
3
Ios
Short Circuit
Current
Vcc=5.5V, In-=0V, In+=3V, Strobe=0V,
Vout=0V
2
-2.8
-6.7
mA
1, 2,
3
Icc
Power Supply
Current (Total of
Both Receivers)
Vcc=5.5V, In-=15.5V, In+=14.5V,
Strobe=5V
12
mA
1, 2,
3
Vcc=5.5V, In-=-14.5V, In+=-15.5V,
Strobe=5V
28
mA
1, 2,
3
Vcc=5.5V, In-=0.5V, In+=0V, Strobe=5V
20.4
mA
1, 2,
3
Rterm
Line Termination
Resistance
Vcc=5V, In+= 0V, Iterm=1mA,
(1mV=1 Ohm)
120
250
Ohm
1, 2,
3
Rin+
Non-Inverting
Input Resistance
Vcc=5V, 1mA < Iin+ < 2mA, Iin-=0V
1.8
KOhm
1, 2,
3
Rin-
Inverting Input
Resistance
Vcc=5V, 1mA < Iin- < 2mA, Iin+=0V
3.6
KOhm
1, 2,
3
Vsh
Strobe Input
Voltage
Vcc=5.5V, Iout=+16mA, Vout <0.4V
1
2.1
V
1, 2,
3
Vsl
Strobe Input
Voltage
Vcc=5.5V, Iout =-400uA, Vout > 2.5V
1
0.9
V
1, 2,
3
4
MNDS7820A-X REV 0A0
MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETER(Continued)
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC:
Vcc = 5V
SYMBOL
PARAMETER
CONDITIONS
NOTES
PIN-
NAME
MIN
MAX
UNIT
SUB-
GROUPS
Vth
Differential
Threshold Voltage
Vcm=+3V, Vout > 2.5V, Iout = -400uA
1
0.5
V
1, 2,
3
Vcm=+3V, Vout < 0.4V, Iout = 16mA
1
-0.5
V
1, 2,
3
Vcm=+15V, Vout > 2.5V, Iout = -400uA
1
1
V
1, 2,
3
Vcm=+15V, Vout < 0.4V, Iout = 16mA
1
-1
V
1, 2,
3
AC Parameters: PROPAGATION DELAY
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC:
Vcc = 5V
tPHL
From Differential
Input
45
nS
9
tPLH
From Differential
Input
40
nS
9
tPHL
From Strobe Input
25
nS
9
tPLH
From Strobe Input
30
nS
9
Note 1:
Parameter tested go-no-go only.
Note 2:
Only one output at a time should be shorted.
5
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