Texas Instruments SN75174DW, SN75174DWR, SN75174J, SN75174N Datasheet
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MA Y 1995
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meets or Exceeds the Requirements of
ANSI Standards EIA/TIA-422-B and RS-485
and ITU Recommendation V.11.
D
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
D
3-State Outputs
D
Common-Mode Output Voltage Range of
–7 V to 12 V
D
Active-High Enable
D
Thermal Shutdown Protection
D
Positive- and Negative-Current Limiting
D
Operates From Single 5-V Supply
D
Low Power Requirements
D
Functionally Interchangeable With MC3487
description
The SN75174 is a monolithic quadruple
differential line driver with 3-state outputs. It is
designed to meet the requirements of ANSI
Standards EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11. The device is optimized
for balanced multipoint bus transmission at rates
up to 4 megabaud. Each driver features wide
positive and negative common-mode output
voltage ranges making it suitable for party-line
applications in noisy environments.
The SN75174 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. This device offers optimum performance when used with the SN75173 or SN75175 quadruple
differential line receivers.
The SN75174 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
OUTPUTS
INPUT
ENABLE
Y Z
H H H L
L H L H
X L Z Z
H = TTL high level, X = irrelevant,
L = TTL low level, Z = high impedance (off)
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.
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
1,2EN
2Z
2Y
2A
GND
V
CC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
N 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
1,2EN
2Z
NC
2Y
2A
GND
V
CC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
3A
DW PACKAGE
(TOP VIEW)
NC – No internal connection
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MA Y 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
EN
EN
4A
3A
3,4EN
2A
1A
1,2EN
15
9
12
7
1
4
4Z
4Y
3Z
3Y
2Z
2Y
1Z
1Y
13
14
11
10
5
6
3
2
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
logic diagram, each driver (positive logic)
A
EN
Y
Z
schematics of inputs and outputs
Enable Inputs: R
(eq)
= 8 kΩ NOM
R
(eq)
= equivalent resistor
Data Inputs: R
(eq)
= 3 kΩ NOM
Input
V
CC
R
(eq)
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
GND
Output
V
CC
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MA Y 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range,V
O
–10 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 the network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
DW 1125 mW 9.0 mW/°C 720 mW
N 1150 mW 9.2 mW/°C 736 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
–7 to 12 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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