Original Creation Date: 01/24/96
Last Update Date: 03/17/97
Last Major Revision Date: 03/06/96
MDDS26LS31M-X REV 1A0 MICROCIRCUIT 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-SMD *
DS26LS31MJ-QMLV**
DS26LS31MJ-SMD ***
DS26LS31MW-QMLV****
DS26LS31MW-SMD*****
Industry Part Number
DS26LS31
Prime Die
DS26LS31
Controlling Document
SEE FEATURES SECTION
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
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MICROCIRCUIT DATA SHEET
MDDS26LS31M-X REV 1A0
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
- Controlling Document: 5962-7802301Q2A*, VEA**, MEA***, VFA****, MFA*****
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MICROCIRCUIT DATA SHEET
MDDS26LS31M-X REV 1A0
(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) 1400 mWCavity Package 1600 mWLCC 850 mWFlat Pack
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= 13mW/C, CERPACK = 7.4mW/C above 25C.
Recommended Operating Conditions
Supply Voltage, Vcc MIN MAX UNITS
4.5 5.5 V
Temperature, TA MIN MAX UNITS
-55 +125 C
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MDDS26LS31M-X REV 1A0 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Vih Logical "1" Input
Voltage Vcc= 4.5V 1, 2 2 V 1, 2,
3
Vil Logical "0" Input
Voltage Vcc= 5.5V 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 -2.0 20 uA 1, 2,
3
Iil Logical "0" Input
Current Vcc= 5.5V, Vin= .4V 2 100 -360 uA 1, 2,
3
Ii Input Reverse
Current Vcc=5.5V, Vin=7V 2 -.01 .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 Output Short
Circuit Current Vcc=5.5V 2 -30 -150 mA 1, 2,
3
Icc Power Supply
Current Vcc=5.5V,
All Outputs Disabled or Active 2 80 mA 1, 2,
3
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MDDS26LS31M-X REV 1A0 MICROCIRCUIT DATA SHEET
Electrical Characteristics
AC PARAMETERS: PROPAGATION DELAY TIME:
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC: Vcc=5V, Vin = 1.3V to Vo = 1.3V, V(pulse) = 0 to 3V .
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
tPLH Input to Output CL = 30 pF 2 20 nS 9
2 30 nS 10, 11
tPHL Input to Output CL = 30 pF 2 20 nS 9
2 30 nS 10, 11
Skew Output to Output CL = 30 pF 2 6 nS 9
2 9 nS 10, 11
tPLZ Enable Time S2 Open, Enable, CL = 10 pF 2 35 nS 9
2 53 nS 10, 11
S2 Open, Enable, CL = 10 pF 235nS9
S2 Open, Enable, CL = 10 pF 2 53 nS 10, 11
tPHZ Enable Time S1 Open, Enable, CL = 10 pF 2 30 nS 9
2 45 nS 10, 11
S1 Open, Enable, CL = 10 pF 230nS9
S1 Open, Enable, CL = 10 pF 2 45 nS 10, 11
tPZL Disable Time S2 Open, Enable, CL = 30 pF 2 45 nS 9
2 68 nS 10, 11
S2 Open, Enable, CL = 30 pF 245nS9
S2 Open, Enable, CL = 30 pF 2 68 nS 10, 11
tPZH Disable Time S1 Open, Enable, CL = 30 pF 2 40 nS 9
2 60 nS 10, 11
S1 Open, Enable, CL = 30 pF 240nS9
S1 Open, Enable, CL = 30 pF 2 60 nS 10, 11
DC PARAMETERS - DRIFT VALUES
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Delta calculations performed on QMLV only devices after burn-in and at Group B5.
AC: .
Voh Output High
Voltage Vcc = 4.5, Ioh = -20 mA 2 -250 250 mV 1
Vol Output Low
Voltage Vcc = 4.5, Iol = 20 mA 2 -50 50 mV 1
Icc Power Supply
Current Vcc = 5.5, All outputs disabled or
active 2 -8 8 mA 1
Note 1: Parameter tested go-no-go only.
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MDDS26LS31M-X REV 1A0 MICROCIRCUIT DATA SHEET
(Continued)
Note 2: Subgroups 1,2 and 9,10: Power dissipation must be externally controlled at elevated
temperatures.
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MICROCIRCUIT DATA SHEET
MDDS26LS31M-X REV 1A0
Graphics and Diagrams
GRAPHICS# DESCRIPTION
E20ARE LDLESS CHIP CARRIER, TYPE C 20 TERMINAL(P/P DWG)
J16ARL CERDIP (J), 16 LEAD (P/P DWG)
W16ARL CERPACK (W), 16 LEAD (P/P DWG)
See attached graphics following this page.
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