Original Creation Date: 01/24/96
Last Update Date: 11/15/96
Last Major Revision Date: 01/24/96
MNDS26LS31M-X REV 0A0
MILITARY DATA SHEET
QUAD HIGH SPEED DIFFERENTIAL LINE DRIVER
General Description
The DS26LS31 is a quad differential line driver designed for digital data transmission
over balanced lines. The DS26LS31 meets all the requirements of EIA Standard RS-422 and
Federal Standard 1020. It is designed to provide unipolar differential drive to
twisted-pair or parallel-wire transmission lines.
The circuit provides an enable and disable function common to all four drivers. The
DS26LS31 features TRI-STATE outputs and logically ANDed complementary outputs. The inputs
are all LS compatible and are all one unit load.
The DS26LS31 features a power up/down protection circuit which keeps the output in a high
impedance state (TRI-STATE) during power up or down preventing erroneous glitches on the
transmission lines.
NS Part Numbers
DS26LS31ME/883
DS26LS31MJ/883
DS26LS31MW/883
Industry Part Number
DS26LS31
Prime Die
DS26LS31
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
MILITARY DATA SHEET
MNDS26LS31M-X REV 0A0
Features
- Operation from Single 5V Supply
- Outputs Won't Load Line When Vcc=0V
- Four Line Drivers in One Package For Maximum Package Density
- Output Short-Circuit Protection
- Complementary Outputs
- Meets the requirements of EIA Standard RS-422
- Pin Compatible with AM26LS31
- Glitch Free Power Up/Down
2
MILITARY DATA SHEET
MNDS26LS31M-X REV 0A0
(Absolute Maximum Ratings)
(Note 1)
Supply Voltage
7V
Input Voltage
7V
Output Voltage
5.5V
Output Voltage (Power OFF)
-0.25 to 6V
Maximum Power Dissipation @ 25 C
(Note 2)
1400mW
Cavity Package
1600mW
LCC Package
850mW
Flat Pack Package
Note 1:
Absolute Maximum Ratings are those values beyond which the safety of the device
cannot be guaranteed. They are not meant to imply that the devices should be operated
at these limits. The table of "Electrical Characteristics" provide conditions for
actual device operation.
Note 2:
Derate CDip = 11.5mW/C, CLCC = 13.0mW/C, CerPak = 7.4mW/C above 25C.
Recommended Operating Conditions
Supply Voltage, Vcc
4.5V to 5.5V
Temperature, TA
-55 C to +125 C
3
MNDS26LS31M-X REV 0A0
MILITARY DATA SHEET
Electrical Characteristics
DC PARAMETERS
SYMBOL
PARAMETER
CONDITIONS
NOTES
PIN-
NAME
MIN
MAX
UNIT
SUB-
GROUPS
Vih
Logical "1" Input
Voltage
1, 2
2
V
1, 2,
3
Vil
Logical "0" Input
Voltage
1, 2
.8
V
1, 2,
3
Voh
Logical "1"
Output Voltage
Vcc= 4.5V, Ioh= -20mA
2
2.5
V
1, 2,
3
Vol
Logical "0"
Output Voltage
Vcc= 4.5V, Iol= 20mA
2
.5
V
1, 2,
3
Iih
Logical "1" Input
Current
Vcc= 5.5V, Vin=2.7V
2
20
uA
1, 2,
3
Iil
Logical "0" Input
Current
Vcc= 5.5V, Vin= .4V
2
-200
uA
1, 2,
3
Ii
Input Reverse
Current
Vcc=5.5V, Vin=7V
2
.1
mA
1, 2,
3
Io
TRI-STATE Output
Current
Vcc=5.5V, Vo= .5V
2
-20
uA
1, 2,
3
Vcc=5.5V, Vo=2.5V
2
20
uA
1, 2,
3
Vic
Input Clamp
Voltage
Vcc=4.5V, Iin= -18mA
2
-1.5
V
1, 2,
3
Ios(min)
Output Short
Circuit Current
Vcc=5.5V
2
-30
mA
1, 2,
3
Ios(max)
Output Short
Circuit Current
Vcc=5.5V
2
-150
mA
1, 2,
3
Icc
Power Supply
Current
Vcc=5.5V,
All Outputs Disabled or Active
2
60
mA
1, 2,
3
4
MNDS26LS31M-X REV 0A0
MILITARY DATA SHEET
Electrical Characteristics
AC PARAMETERS: PROPAGATION DELAY TIME:
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC:
Vcc=5V, Cl=50pF or equivalent impedance provided by diode load.
SYMBOL
PARAMETER
CONDITIONS
NOTES
PIN-
NAME
MIN
MAX
UNIT
SUB-
GROUPS
tPLH
Input to Output
2, 3
15
nS
9
2, 3
30
nS
10, 11
tPHL
Input to Output
2, 3
15
nS
9
2, 3
30
nS
10, 11
Skew
Output to Output
2, 3
6
nS
9
2, 3
9
nS
10, 11
tLZ
Enable Time
S2 Open, Enable
2, 3
35
nS
9
2, 3
53
nS
10, 11
S2 Open, /Enable
2, 3
35
nS
9
2, 3
53
nS
10, 11
tHZ
Enable Time
S1 Open, Enable
2, 3
25
nS
9
2, 3
45
nS
10, 11
S1 Open, /Enable
2, 3
25
nS
9
2, 3
45
nS
10, 11
tZL
Disable Time
S2 Open, Enable
2, 3
30
nS
9
2, 3
68
nS
10, 11
S2 Open, /Enable
2, 3
30
nS
9
2, 3
68
nS
10, 11
tZH
Disable Time
S1 Open, Enable
2, 3
30
nS
9
2, 3
60
nS
10, 11
S1 Open, /Enable
2, 3
30
nS
9
2, 3
60
nS
10, 11
Note 1:
Parameter tested go-no-go only.
Note 2:
Subgroups 1,2 and 9,10: Power dissipation must be externally controlled at elevated
temperatures.
Note 3:
SBGRP 10 and 11 guaranteed but not tested.
5
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