AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUARY 1979 – REVISED OCTOBER 2001
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meets or Exceeds the Requirements of
ANSI TIA/EIA-422-B and ITU
Recommendation V.11
D
Operates From a Single 5-V Supply
D
TTL Compatible
D
Complementary Outputs
D
High Output Impedance in Power-Off
Conditions
D
Complementary Output-Enable Inputs
description
The AM26LS31 is a quadruple complementary-output line driver designed to meet the requirements of
ANSI TIA/EIA-422-B and ITU (formerly CCITT) Recommendation V.11. The 3-state outputs have high-current
capability for driving balanced lines such as twisted-pair or parallel-wire transmission lines, and they provide
a high-impedance state in the power-off condition. The enable function is common to all four drivers and of fers
the choice of an active-high or active-low enable (G, G) input. Low-power Schottky circuitry reduces power
consumption without sacrificing speed.
The AM26LS31 is characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
TAPLASTIC
SMALL OUTLINE
(D)
PLASTIC SHRINK
SMALL OUTLINE
(DB)
PLASTIC
DIP
(N)
0°C to 70°C AM26LS31CD AM26LS31CDB AM26LS31CN
The DB package is only available taped and reeled. Add the suffix R to the device type
(e.g., AM26LS31CDBR).
FUNCTION TABLE
(each driver)
INPUT ENABLES OUTPUTS
AG G Y Z
H H X H L
L H XLH
H X LHL
L X LLH
X L H Z Z
H = high level, L = low level, X = irrelevant,
Z = high impedance (of f)
Copyright 2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
G
2Z
2Y
2A
GND
VCC
4A
4Y
4Z
G
3Z
3Y
3A
D, DB, OR N PACKAGE
(TOP VIEW)
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
1Z
1Y
G
G
1A
4
12
12
3
2Z
2Y
2A 76
5
3Z
3Y
3A 910
11
4Z
4Y
4A 15 14
13
schematic (each driver)
22 kΩ
To Three Other Drivers
Common to All Four Drivers
GND
Enable G
Enable G
VCC
V
V
Output Y
9 Ω
Input A
22 kΩ
22 kΩ
All resistor values are nominal.
Output Z
9 Ω
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC (see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output off-state voltage 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Note 2): D package 73°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DB package 82°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only , and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may af fect device reliability.
NOTES: 1. All voltage values, except differential output voltage VOD, are with respect to network GND.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN NOM MAX UNIT
VCC Supply voltage 4.75 5 5.25 V
VIH High-level input voltage 2 V
VIL Low-level input voltage 0.8 V
IOH High-level output current –20 mA
IOL Low-level output current 20 mA
TAOperating free-air temperature 0 70 °C
electrical characteristics over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT
VIK Input clamp voltage VCC = 4.75 V, II = –18 mA –1.5 V
VOH High-level output voltage VCC = 4.75 V, IOH = –20 mA 2.5 V
VOL Low-level output voltage VCC = 4.75 V, IOL = 20 mA 0.5 V
IOZ
Off state (high im
p
edance state) out
p
ut current
VCC = 4 75 V
VO = 0.5 V –20
µA
I
OZ
Off
-
state
(high
-
impedance
-
state)
output
current
V
CC =
4
.
75
V
VO = 2.5 V 20 µ
A
IIInput current at maximum input voltage VCC = 5.25 V, VI = 7 V 0.1 mA
IIH High-level input current VCC = 5.25 V, VI = 2.7 V 20 µA
IIL Low-level input current VCC = 5.25 V, VI = 0.4 V –0.36 mA
IOS Short-circuit output current§VCC = 5.25 V –30 –150 mA
ICC Supply current VCC = 5.25 V, All outputs disabled 32 80 mA
‡All typical values are at VCC = 5 V and TA = 25°C.
§Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second.
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics, VCC = 5 V, TA = 25°C (see Figure 1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tPLH Propagation delay time, low-to-high-level output
CL=30
p
F
S1 and S2 o
p
en
14 20
ns
tPHL Propagation delay time, high-to-low-level output
C
L =
30
pF
,
S1
and
S2
open
14 20
ns
tPZH Output enable time to high level
CL=30
p
F
RL = 75 Ω25 40
ns
tPZL Output enable time to low level
C
L =
30
pF
RL = 180 Ω37 45
ns
tPHZ Output disable time from high level
CL=10
p
F
S1 and S2 closed
21 30
ns
tPLZ Output disable time from low level
C
L =
10
pF
,
S1
and
S2
closed
23 35
ns
Output-to-output skew CL = 30 pF, S1 and S2 open 1 6 ns
PARAMETER MEASUREMENT INFORMATION
Waveform 1
(see Note E)
Output Z
Output Y
Input A
(see Notes B
and C)
VOL
VOH
VOL
VOH
3 V
tPHL
Skew Skew
tPLH
tPLH
tPHL
0 V
PROPAGATION DELAY TIMES AND SKEW TEST CIRCUIT
VCC
Test Point
S1
S2
75 Ω
180 Ω
CL
(see Note A)
From Output
Under Test
VOH
VOL
≈1.5 V
0 V
3 V
Enable G
Enable G
(see Note D)
S1 Open
S2 Closed
S1 Closed
S2 Open
tPZH
tPZL
tPHZ
tPLZ
S1 Closed
S2 Closed
0.5 V
≈0 V
≈4.5 V S1 Closed
S2 Closed
≈1.5 V
ENABLE AND DISABLE TIME WAVEFORMS
See Note D
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO ≈ 50 Ω, tr ≤ 15 ns, tf ≤ 6 ns.
C. When measuring propagation delay times and skew, switches S1 and S2 are open.
D. Each enable is tested separately.
E. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
W aveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
1.3 V 1.3 V
1.5 V
1.5 V
1.5 V 1.5 V
W aveform 2
(see Note E)
0.5 V
1.5 V
1.5 V
Figure 1. Test Circuit and Voltage Waveforms
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 2
VI – Enable G Input Voltage – V
OUTPUT VOLTAGE
vs
ENABLE G INPUT VOLTAGE
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 5.25 V
ÎÎÎÎ
ÎÎÎÎ
VCC = 5 V
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 4.75 V
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
Load = 470 Ω to GND
TA = 25°C
See Note A
– Y Output Voltage – V
VO
4
3
2
1
00123
Figure 3
VI – Enable G Input Voltage – V
OUTPUT VOLTAGE
vs
ENABLE G INPUT VOLTAGE
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
VCC = 5 V
Load = 470 Ω to GND
See Note A
ÎÎÎÎ
TA = 70°C
ÎÎÎÎ
ÎÎÎÎ
TA = 0°C
ÎÎÎÎÎ
ÎÎÎÎÎ
TA = 25°C
– Y Output Voltage – VVO
4
3
2
1
00123
Figure 4
VI – Enable G Input Voltage – V
– Output Voltage – V
OUTPUT VOLTAGE
vs
ENABLE G INPUT VOLTAGE
VO
ÎÎÎÎ
ÎÎÎÎ
VCC = 5.25 V
ÎÎÎÎ
ÎÎÎÎ
VCC = 5 V
ÎÎÎÎ
ÎÎÎÎ
VCC = 4.75 V
4
3
2
1
00123
5
6
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
Load = 470 Ω to VCC
TA = 25°C
See Note B
Figure 5
VI – Enable G Input Voltage – V
OUTPUT VOLTAGE
vs
ENABLE G INPUT VOLTAGE
ÎÎÎÎ
ÎÎÎÎ
TA = 25°C
ÎÎÎÎ
ÎÎÎÎ
TA = 0°C
ÎÎÎÎÎ
ÎÎÎÎÎ
TA = 70°C
– Output Voltage – VVO
4
3
2
1
00123
5
6
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎ
VCC = 5 V
Load = 470 Ω to VCC
See Note B
NOTES: A. The A input is connected to VCC during testing of the Y outputs and to ground during testing of the Z outputs.
B. The A input is connected to ground during testing of the Y outputs and to VCC during testing of the Z outputs.
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 6
– High-Level Output Voltage – V
TA – Free-Air Temperature –°C
ÎÎÎÎÎ
ÎÎÎÎÎ
IOH = –20 mA
ÎÎÎÎÎ
ÎÎÎÎÎ
IOH = –40 mA
HIGH-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
VOH
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
VCC = 5 V
See Note A
4
3
2
1
00255075
5
Figure 7
IOH – High-Level Output Current – mA
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
ÎÎÎÎÎ
VCC = 5.25 V
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 4.75 V
ÎÎÎÎ
ÎÎÎÎ
VCC = 5 V
ÎÎÎÎ
ÎÎÎÎ
TA = 25°C
See Note A
– High-Level Output Voltage – V
VOH
4
3
2
1
00–20 –40 –60 –80 –100
Figure 8
– Low-Level Output Voltage – V
TA – Free-Air Temperature – °C
ÎÎÎÎÎ
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 5 V
IOL = 40 mA
See Note B
LOW-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
VOL
0.4
0.3
0.2
0.1
025 50 75
0.5
0
Figure 9
IOL – Low-Level Output Current – mA
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 5.25 V
ÎÎÎÎ
ÎÎÎÎ
VCC = 4.75 V
ÎÎÎÎ
ÎÎÎÎ
TA = 25°C
See Note B
– Low-Level Output Voltage – VVOL
0.4
0.3
0.2
0.1
040 80 120
0.5
0 1006020
0.6
0.7
0.8
0.9
1
NOTES: A. The A input is connected to VCC during testing of the Y outputs and to ground during testing of the Z outputs.
B. The A input is connected to ground during testing of the Y outputs and to VCC during testing of the Z inputs.
AM26LS31
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114F – JANUAR Y 1979 – REVISED OCT OBER 2001
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
ÎÎÎÎ
ÎÎÎÎ
VCC = 5 V
Figure 10
VI – Data Input Voltage – V
Y OUTPUT VOLTAGE
vs
DATA INPUT VOLTAGE
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 4.75 V
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
No Load
TA = 25°C
ÎÎÎÎÎ
ÎÎÎÎÎ
VCC = 5.25 V
– Y Output Voltage – V
VO
4
3
2
1
00123
5
Figure 11
Y OUTPUT VOLTAGE
vs
DATA INPUT VOLTAGE
ÎÎÎÎ
ÎÎÎÎ
TA = 25°C
ÎÎÎÎ
ÎÎÎÎ
No Load
ÎÎÎÎ
ÎÎÎÎ
TA = 0°C
ÎÎÎÎ
ÎÎÎÎ
TA = 70°C
VI – Data Input Voltage – V
– Y Output Voltage – VVO
4
3
2
1
00123
5
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Copyright 2001, Texas Instruments Incorporated
