AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUARY 1979 – REVISED JULY 2002
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/ordering information
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 .1 1.
The 3-state outputs have high-current capability
for driving balanced lines such as twisted-pair or
parallel-wire transmission lines, and they are in
the high-impedance state in the power-off
condition. The enable function is common to all
four drivers and offers the choice of an active-high
or active-low enable (G, G) input. Low-power
Schottky circuitry reduces power consumption
without sacrificing speed.
ORDERING INFORMATION
TAPACKAGE†ORDERABLE
PART NUMBER TOP-SIDE
MARKING
PDIP – N Tube AM26LS31CN AM26LS31CN
SOIC D
Tube AM26LS31CD
AM26LS31C
0°C to 70°C
SOIC
–
D
Tape and reel AM26LS31CDR
AM26LS31C
SOP – NS Tape and reel AM26LS31CNSR 26LS31
SSOP – DB Tape and reel AM26LS31CDBR SA31C
55°Cto125°C
CDIP – J Tube AM26LS31MJ AM26LS31MJB
–
55°C
to
125°C
LCCC – FK Tube AM26LS31MFK AM26LS31MFKB
†Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright 2002, 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, N, NS, OR J PACKAGE
(TOP VIEW)
1920132
17
18
16
15
14
1312119 10
5
4
6
7
8
4Y
4Z
NC
G
3Z
1Z
G
NC
2Z
2Y
1Y
1A
NC
V
4A
GND
NC
3A
3Y
2A
FK PACKAGE
(TOP VIEW)
CC
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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)
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
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
4POST 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package 64°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package 300°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.
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°CDERATING FACTOR T
A
= 70°C T
A
= 125°C
PACKAGE
A
POWER RATING ABOVE TA = 25°C‡
A
POWER RATING
A
POWER RATING
FK 1375 mW 11.0 mW/°C880 mW 275 mW
J1375 mW 11.0 mW/°C880 mW 275 mW
‡This is the inverse of the traditional junction-to-ambient thermal resistance (RθJA). Thermal resistances are not
production tested and the values given are for informational purposes only.
recommended operating conditions
MIN NOM MAX UNIT
VCC
Su
pp
ly voltage
AM26LS31C 4.75 5 5.25
V
V
CC
Supply
voltage
AM26LS31M 4.5 5 5.5
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
TA
O
p
erating free air tem
p
erature
AM26LS31C 0 70
°C
T
A
Operating
free
-
air
temperature
AM26LS31M –55 125
°C
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over operating free-air temperature range (unless otherwise noted)†
PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT
VIK Input clamp voltage VCC = MIN, II = –18 mA –1.5 V
VOH
High level out
p
ut voltage
V
CC
= MIN, TA = –55°C 2.4
V
V
OH
High
-
level
output
voltage
CC ,
IOH = –20 mA All other temperatures 2.5
V
VOL Low-level output voltage VCC = MIN, IOL = 20 mA 0.5 V
IOZ
Off state (high im
p
edance state) out
p
ut current
VCC = MIN
VO = 0.5 V –20
µA
I
OZ
Off
-
state
(high
-
impedance
-
state)
output
current
V
CC =
MIN
VO = 2.5 V 20 µ
A
IIInput current at maximum input voltage VCC = MAX, VI = 7 V 0.1 mA
IIH High-level input current VCC = MAX, VI = 2.7 V 20 µA
IIL Low-level input current VCC = MAX, VI = 0.4 V –0.36 mA
IOS Short-circuit output current§VCC = MAX –30 –150 mA
ICC Supply current VCC = MAX, All outputs disabled 32 80 mA
†For C suffix devices, VCC MIN = 4.75 V and VCC MAX = 5.25 V. For M suffix devices, VCC MIN = 4.5 V and VCC MAX = 5.5 V.
‡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.
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
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
7
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.
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
8POST 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.
AM26LS31C, AM26LS31M
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS114H – JANUAR Y 1979 – REVISED JULY 2002
9
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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Post Office Box 655303
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Copyright 2002, Texas Instruments Incorporated
