Texas Instruments SN75ALS172ADW, SN75ALS172ADWR, SN75ALS172AN Datasheet
SN75ALS172A
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS121D – AUGUST 1990 – REVISED APRIL 1998
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meets or Exceeds ANSI Standards
EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11
D
High-Speed Advanced Low-Power Schottky
Circuitry
D
Designed for 20-MBaud Operation in Both
Serial and Parallel Applications
D
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
D
Low Supply-Current Requirements:
55 mA Max
D
Wide Positive and Negative Input/Output
Bus-Voltage Ranges
D
Driver Output Capacity...±60 mA
D
Thermal Shutdown Protection
D
Driver Positive and Negative Current
Limiting
D
Logically Interchangeable With SN75172
description
The SN75ALS172A comprises four line drivers
with 3-state differential outputs. They are
designed to meet the requirements of ANSI
Standards EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11. This device is optimized
for balanced multipoint bus transmission at rates
of up to 20 Mbaud. Each driver features wide
positive and negative common-mode output
voltage ranges, making it suitable for party-line
applications in noisy environments.
The SN75ALS172A provides positive- and negative-current 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 SN75ALS172A is characterized for operation from 0°C to 70°C.
Copyright 1998, 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.
DW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1A
1Y
NC
1Z
G
2Z
NC
2Y
2A
GND
V
CC
4A
4Y
NC
4Z
G
3Z
NC
3Y
3A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
G
2Z
2Y
2A
GND
V
CC
4A
4Y
4Z
G
3Z
3Y
3A
N PACKAGE
(TOP VIEW)
NC – No internal connection
SN75ALS172A
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS121D – AUGUST 1990 – REVISED APRIL 1998
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
(each driver)
INPUT
ENABLES OUTPUTS
A
G G Y Z
H H X H L
L H XLH
H XLHL
L XLLH
X LHZZ
H = high level, L = low level, X = irrelevant,
Z = high impedance (off)
logic symbol
†
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the N package.
3Y
10
3Z
11
4Y
14
4Z
13
9
3A
15
4A
1Y
2
1Z
3
2Y
6
2Z
5
1
1A
7
2A
4
G
12
≥1
G
EN
logic diagram (positive logic)
1
7
12
9
15
2
3
6
5
10
11
14
13
4
1A
2A
3A
4A
G
G
1Y
1Z
2Y
2Z
3Y
3Z
4Y
4Z
Pin numbers shown are for the N package.
SN75ALS172A
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS121D – AUGUST 1990 – REVISED APRIL 1998
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
Input
V
CC
Output
GND
V
CC
EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS
35 kΩ NOM
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
–9 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–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.
NOTE 1: All voltage values are with respect to network ground terminal.
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 mW/°C 720 mW 585 mW
N 1150 mW 9.2 mW/°C 736 mW 598 mW
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
CC
4.75 5 5.25 V
High-level input voltage, V
IH
2 V
Low-level input voltage, V
IL
0.8 V
Common-mode output voltage, V
OC
12
–7
V
High-level output current, I
OH
–60 mA
Low-level output current, I
OL
60 mA
Operating free-air temperature, T
A
0 70 °
C
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