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SN75ALS174A
SLLS122F – JULY 1991 – REVISED JANUARY 2018
SN75ALS174A Quadruple Differential Line Driver
1 Features
•
1
•
•
•
•
•
•
•
•
•
Meets or Exceeds the Requirements of ANSI
EIA/TIA-422-B and RS-485
High-Speed Advanced Low-Power Schottky
Circuitry
Designed for up to 20-Mbit/s Operation in Both
Serial and Parallel Applications
Designed for Multipoint Transmission on Long Bus
Lines in Noisy Environments
Low Supply Current Requirements 55 mA Max
Wide Positive and Negative Input/Output Bus
Voltage Ranges
Driver Output Capacity: 60 mA
Thermal-Shutdown Protection
Driver Positive- and Negative-Current Limiting
Functionally Interchangeable With SN75174
2 Applications
•
•
Each driver features wide positive and negative
common-mode output voltage ranges that make them
suitable for party-line applications in noisy
environments.
The SN75ALS174A provides positive- and negativecurrent limiting and thermal shutdown for protection
from line fault conditions on the transmission bus line.
Shutdown occurs at a junction temperature of
approximately 150°C.
The SN75ALS174A is characterized for operation
from 0°C to 70°C.
Device Information(1)
PART NUMBER
SN75ALS174A
PACKAGE
BODY SIZE (NOM)
PDIP (N) (16)
19.3 mm x 6.50 mm
SOIC (DW) (20)
12.8 mm x 7.50 mm
TSSOP (PW) (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Function Table
(each driver)(1) (2)
Motor Drives
Factory Automation and Control
OUTPUTS
INPUT A
ENABLES
H
H
H
L
L
H
L
H
X
L
Z
Z
Y
3 Description
The SN75ALS174A is a quadruple line driver with tristate differential outputs. It is designed to meet the
requirements of ANSI Standards EIA/TIA-422-B and
RS-485. This device is optimized for balanced
multipoint bus transmission at rates of up to 20
Mbit/s.
Z
(1) H = high level, L = low level, X = irrelevant.
(2) Z = high impedance (off)
Spacer
N Package
(Top View)
1A
1Y
1Z
1,2EN
2Z
2Y
2A
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
DW, PW Package
(Top View)
VCC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
1A
1Y
NC
1Z
1,2EN
2Z
NC
2Y
2A
GND
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
3A
NC ± No internal connection
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN75ALS174A
SLLS122F – JULY 1991 – REVISED JANUARY 2018
www.ti.com
Table of Contents
1
2
3
4
5
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Specifications.........................................................
1
1
1
2
3
5.1
5.2
5.3
5.4
5.5
3
3
3
4
4
Absolute Maximum Ratings ......................................
Dissipation Rating Table ...........................................
Recommended Operating Conditions.......................
Electrical Characteristics...........................................
Switching Characteristics ..........................................
6
7
Parameter Measurement Information .................. 5
Device and Documentation Support.................... 8
7.1
7.2
7.3
7.4
7.5
7.6
8
Documentation Support ...........................................
Receiving Notification of Documentation Updates....
Community Resources..............................................
Trademarks ...............................................................
Electrostatic Discharge Caution ................................
Glossary ....................................................................
8
8
8
8
8
8
Mechanical, Packaging, and Orderable
Information ............................................................. 8
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (April 1998) to Revision F
•
2
Page
Added the PW package, Applications list, Device Information table, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................ 1
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Product Folder Links: SN75ALS174A
SN75ALS174A
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SLLS122F – JULY 1991 – REVISED JANUARY 2018
5 Specifications
5.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
MIN
Supply voltage, VCC (2)
Input voltage, VI
Output voltage range, VO
–9
Continuous total dissipation
(2)
UNIT
7
V
7
V
14
V
See the Dissipation Rating table
Storage temperature, Tstg
(1)
MAX
–65
150
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network GND.
5.2 Dissipation Rating Table
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
DW
1125 mW
9.0 mW/°C
720 mW
596 mW
N
1150 mW
9.2 mW/°C
736 mW
598 mW
5.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
VCC
Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
VOC
Common-mode output voltage
IOH
High-level output current
IOL
Low-level output current
TA
Operating free-air temperature
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
2
0
V
0.8
V
12
V
–7
V
–60
mA
60
mA
70
°C
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SLLS122F – JULY 1991 – REVISED JANUARY 2018
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5.4 Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP (1)
MAX
UNIT
VIK
Input clamp voltage
II = –18 mA
–1.5
V
VO
Output voltage
IO = 0
0
6
V
|VOD1|
Differential output voltage
IO = 0
1.5
6
V
RL = 100 Ω
|VOD2|
Differential output voltage
See Note Figure 1
|VOD3|
Differential output voltage
See
Δ|VOD|
Change in magnitude of
differential output voltage (4)
RL = 54 Ω or 100 Ω
See Figure 1
VOC
Common-mode output
voltage (5)
RL = 54 Ω or 100 Ω
See Figure 1
Δ|VOC|
Change in magnitude of
common-mode output
voltage (4)
RL = 54 Ω or 100 Ω
See Figure 1
IO
Output current with power off
IOZ
High-impedance-state output
current
IIH
High-level input current
IIL
IOS
ICC
1/2 VOD1
or 2 (2)
RL = 54 Ω
(1)
(2)
(3)
(4)
(5)
V
1.5
(3)
2.5
5
V
5
V
±0.2
V
1.5
3
V
–1
V
±0.2
V
VCC = 0, VO = –7 V to 12 V
±100
µA
VO = –7 V to 12 V
±100
µA
VI = 2.7 V
20
µA
Low-level input current
VI = 0.4 V
–100
µA
Short-circuit output current
VO = –7 V to 12 V
±250
mA
Supply current (all drivers)
No load
Outputs enabled
36
55
mA
Outputs disabled
16
30
mA
All typical values are at VCC = 5 V and TA = 25°C.
The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2 V, whichever is greater.
See EIA Standard RS-485, Figures 3-5, Test Termination Measurement 2.
Δ|VOD| and Δ|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, VOC, which is the average of the two output voltages with respect to ground, is called output offset
voltage, VOS.
5.5 Switching Characteristics
over operating free-air temperature range (unless otherwise noted), CL = 50 pF
MIN
TYP
MAX
td(OD)
Differential output delay time
PARAMETER
RL = 54 Ω, See Figure 2
9
15
22
ns
tPZH
Output enable time to high level
RL = 110 Ω, See Figure 3
30
45
70
ns
tPZL
Output enable time to low level
RL = 110 Ω, See Figure 4
25
40
65
ns
tPHZ
Output disable time from high level
RL = 110 Ω, See Figure 3
10
20
35
ns
tPLZ
Output disable time from low level
RL = 110 Ω, See Figure 4
10
30
45
ns
4
TEST CONDITIONS
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UNIT
Copyright © 1991–2018, Texas Instruments Incorporated
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SN75ALS174A
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SLLS122F – JULY 1991 – REVISED JANUARY 2018
6 Parameter Measurement Information
RL
2
VOD2
RL
2
VOC
Copyright © 2018, Texas Instruments Incorporated
Figure 1. Differential and Common-Mode Output Voltages
3V
Y
CL
Generator
(see Note A)
50 :
Input
RL =
54 :
1.5 V
td(ODH)
Z
3V
1.5 V
0V
td(ODL)
Output Z
CL = 50 pF
(see Note B)
Output Y
TEST CIRCUIT
VOLTAGE WAVEFORMS
Copyright © 2018, Texas Instruments Incorporated
A.
The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle =
50%, tf 5 ns, tr 5 ns.
B.
CL includes probe and stray capacitance.
Figure 2. Differential-Output Test Circuit and Delay and Transition Times Voltage Waveforms
3V
Output
S1
0 V or 3 V
Generator
(see Note A)
Input
CL = 50 pF
(see Note B)
50 :
1.5 V
1.5 V
0V
RL = 110 :
Output
PZH
0.5 V
VOH
2.3 V
Voff C 0 V
tPHZ
TEST CIRCUIT
VOLTAGE WAVEFORMS
Copyright © 2018, Texas Instruments Incorporated
A.
The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle =
50%, tf 5 ns, tr 5 ns.
B.
CL includes probe and stray capacitance.
Figure 3. Test Circuit and Voltage Waveforms, tPZH and tPHZ
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SN75ALS174A
SLLS122F – JULY 1991 – REVISED JANUARY 2018
www.ti.com
Parameter Measurement Information (continued)
5V
RL = 110 :
0 V or 3 V
Generator
(see Note A)
Output
S1
3V
1.5 V
Input
1.5 V
0V
tPZL
CL = 50 pF
(see Note B)
50 :
tPLZ
5V
2.3 V
Output
VOL
0.5 V
TEST CIRCUIT
VOLTAGE WAVEFORMS
Copyright © 2018, Texas Instruments Incorporated
A.
The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, duty cycle =
50%, tf 5 ns, tr 5 ns.
B.
CL includes probe and stray capacitance.
Figure 4. Test Circuit and Voltage Waveforms, tPZL and tPLZ
1,2EN
4
EN
2
1A
1
3
6
2A
3,4EN
7
5
12
9
11
14
4A
1Z
2Y
2Z
EN
10
3A
1Y
15
13
(1)
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
(2)
Pin numbers shown are for the N package.
3Y
3Z
4Y
4Z
Figure 5. Logic Symbol
6
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SLLS122F – JULY 1991 – REVISED JANUARY 2018
Parameter Measurement Information (continued)
1,2EN
4
2
1A
2A
3,4EN
1
7
3
6
5
4A
(1)
1Z
2Y
2Z
12
10
3A
1Y
9
15
11
14
13
3Y
3Z
4Y
4Z
Pin numbers shown are for the N package.
Figure 6. Logic Diagram (Positive Logic)
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
VCC
VCC
35 k: NOM
Input
Output
GND
Copyright © 2018, Texas Instruments Incorporated
Figure 7. Schematics of Inputs and Outputs
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SN75ALS174A
SLLS122F – JULY 1991 – REVISED JANUARY 2018
www.ti.com
7 Device and Documentation Support
7.1 Documentation Support
7.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
7.3 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
7.4 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
7.5 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
7.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
8 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
8
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PACKAGE OPTION ADDENDUM
www.ti.com
13-Aug-2021
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)
(4/5)
(6)
SN75ALS174ADW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75ALS174A
SN75ALS174ADWE4
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75ALS174A
SN75ALS174ADWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
75ALS174A
SN75ALS174AN
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
SN75ALS174AN
SN75ALS174APWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
LS174A
(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