SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
D
D
D
D
D
D
D
D
D
D
Meets or Exceeds the Requirements of
ANSI Standards EIA/TIA-422-B and RS-485
and ITU Recommendation V.11.
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
3-State Outputs
Common-Mode Output Voltage Range of
– 7 V to 12 V
Active-High Enable
Thermal Shutdown Protection
Positive- and Negative-Current Limiting
Operates From Single 5-V Supply
Low Power Requirements
Functionally Interchangeable With MC3487
N PACKAGE
(TOP VIEW)
1A
1Y
1Z
1, 2EN
2Z
2Y
2A
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
4A
4Y
4Z
3, 4EN
3Z
3Y
3A
DW PACKAGE
(TOP VIEW)
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.
1A
1Y
NC
1Z
1, 2EN
2Z
NC
2Y
2A
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
4A
4Y
NC
4Z
3, 4EN
3Z
NC
3Y
3A
NC – No internal connection
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)
INPUT
H
L
X
ENABLE
H
H
L
OUTPUTS
Y
H
L
Z
Z
L
H
Z
H = TTL high level, X = irrelevant,
L = TTL low level, Z = high impedance (off)
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.
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.
Copyright
©
1995, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
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