SN75ALS191
DUAL DIFFERENTIAL LINE DRIVER
SLLS032B − DECEMBER 1987 − REVISED MAY 1995
D Meets or Exceeds the Requirements of
D
D
D
D
D
D OR P PACKAGE
(TOP VIEW)
ANSI Standard EIA/TIA-422-B and ITU
Recommendation V.11
Designed to Operate at 20 Mbaud or Higher
TTL-and CMOS-Input Compatibility
Single 5-V Supply Operation
Output Short-Circuit Protection
Improved Replacement for the μA9638
VCC
1A
2A
GND
1
8
2
7
3
6
4
5
1Y
1Z
2Y
2Z
description
The SN75ALS191 is a dual, high-speed, differential line driver designed to meet ANSI Standard EIA/TIA-422-B
and ITU Recommendation V.11. The inputs are TTL- and CMOS-compatible and have input clamp diodes.
Schottky-diode-clamped transistors minimize propagation delay time. This device operates from a single 5-V
power supply and is supplied in eight-pin packages.
The SN75ALS191 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
OUTPUTS
INPUTS
A
Y
Z
H
H
L
L
L
H
H = high level, L = low level,
Z = high impedance
logic symbol†
1A
2A
†
2
3
logic diagram (positive logic)
8
8
1Y
7
1Z
6
2Y
5
2Z
2
1A
7
6
3
2A
5
1Y
1Z
2Y
2Z
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
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.
Copyright © 1995, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN75ALS191
DUAL DIFFERENTIAL LINE DRIVER
SLLS032B − DECEMBER 1987 − REVISED MAY 1995
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
VCC
VCC
40 kΩ NOM
Input
10 Ω
Output
GND
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
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°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 affect device reliability.
NOTES: 1. All voltage values except differential output voltage (VOD) are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
D
725 mW
5.8 mW/°C
464 mW
P
1000 mW
8.0 mW/°C
640 mW
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
2
Low-level input voltage, VIL
High-level output current, IOH
Low-level output current, IOL
Operating free-air temperature, TA
2
0
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• DALLAS, TEXAS 75265
V
0.8
V
− 50
mA
50
mA
70
°C
SN75ALS191
DUAL DIFFERENTIAL LINE DRIVER
SLLS032B − DECEMBER 1987 − REVISED MAY 1995
electrical characteristics over operating free-air temperature range (unless otherwise noted)
PARAMETER
VIK
MIN
TYP†
MAX
UNIT
−1
−1.2
V
IOH = − 10 mA
2.5
3.3
IOH = − 40 mA
2
TEST CONDITIONS
Input clamp voltage
VCC = 4.75 V,
II = −18 mA
VOH
Hi h l
l output
t t voltage
lt
High-level
VCC = 4.75 V,
VIL = 0.8 V
VIH = 2 V,
VOL
Low-level output voltage
VCC = 4.75 V,
IOL = 40 mA
VIH = 2 V,
|VOD1|
Differential output voltage
VCC = 5.25 V,
IO = 0
|VOD2|
Differential output voltage
Δ |VOD|
Change in magnitude of
differential output voltage ‡
VOC
Common-mode output voltage§
Δ |VOC|
Change in magnitude of
common-mode output voltage ‡
VIL = 0.8 V,
Output current with power off
0.5
V
2 VOD2
V
2
V
RL = 100 Ω,
VCC = 4.75 V to 5.25 V,
See Figure 1
VO = 6 V
IO
V
VO = − 0.25 V
VCC = 0
V
100
−0.1
−100
μA
± 100
25
μA
VI = 0.5 V
200
μA
−150
mA
40
mA
VI = 5.5 V
IIH
High-level input current
VCC = 5.25 V,
IIL
Low-level input current
VCC = 5.25 V,
VCC = 5.25 V,
VO = 0
VCC = 5.25 V,
No load,
Supply current (all drivers)
± 0.4
VI = 2.7 V
VCC = 5.25 V,
Short-circuit output
V
μA
Input current
ICC
3
50
II
IOS
V
0.1
VO = − 0.25 V to 6 V
current¶
± 0.4
−50
All inputs at 0 V
32
†
All typical values are at VCC = 5 V and TA = 25°C.
‡|V
OD | and | VOC | are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low
level.
§ In ANSI Standard EIA/TIA-422-B, V , which is the average of the two output voltages with respect to ground, is called output offset voltage,
OC
VOS.
¶ Only one output at a time should be shorted, and duration of the short circuit should not exceed one second.
switching characteristics over recommended operating free-air temperature range, VCC = 5 V
PARAMETER
td(OD)
Differential-output delay time
tt(OD)
Differential-output transition time
TEST CONDITIONS
CL = 15 pF,
p ,
RL = 100 Ω,,
See Figure
g
2
Skew
MIN
TYP#
MAX
3.5
7
ns
3.5
7
ns
1.5
4
ns
UNIT
# Typical values are at TA = 25°C.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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SN75ALS191
DUAL DIFFERENTIAL LINE DRIVER
SLLS032B − DECEMBER 1987 − REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
50 Ω
Input
VOD2
50 Ω
VOC
Figure 1. Differential and Common-Mode Output Voltages
3V
Input
1.5 V
1.5 V
Y Output
0V
td(OD)
td(OD)
CL
RL = 100 Ω
Generator
(see Note A)
50 Ω
90%
Differential
Output
10%
10%
tt(OD)
Z Output
CL
CL = 15 pF
(see Note B)
90%
tt(OD)
VOH
Y Output
50%
Skew
50%
VOL
Skew
VOH
Z Output
TEST CIRCUIT
50%
50%
VOLTAGE WAVEFORMS
NOTES: A. The input pulse generator has the following characteristics: ZO = 50 Ω, PRR ≤ 500 kHz, tw = 100 ns, tr = ≤ 5 ns.
B. CL includes probe and jig capacitance.
Figure 2. Test Circuit and Voltage Waveforms
4
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VOL
PACKAGE OPTION ADDENDUM
www.ti.com
13-Jul-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
SN75ALS191D
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75A191
Samples
SN75ALS191DG4
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75A191
Samples
SN75ALS191DR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75A191
Samples
SN75ALS191P
ACTIVE
PDIP
P
8
50
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
75ALS191
Samples
SN75ALS191PE4
ACTIVE
PDIP
P
8
50
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
75ALS191
Samples
SN75ALS191PSR
ACTIVE
SO
PS
8
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
V191
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
