SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
D
D
D
D
D
D
D
N PACKAGE
(TOP VIEW)
Meets or Exceeds the Standard EIA-485
Designed for High-Speed Multipoint
Transmission on Long Bus Lines in Noisy
Environments
Supports Data Rates up to and Exceeding
Ten Million Transfers Per Second
Common-Mode Output Voltage Range of
– 7 V to 12 V
Positive- and Negative-Current Limiting
Low Power Consumption . . . 1.5 mA Max
(Output Disabled)
Functionally Interchangeable With SN75174
1A
1Y
1Z
1,2EN
2Z
2Y
2A
GND
Both the SN65LBC174 and SN75LBC174 provide
positive- and negative-current limiting and
thermal shutdown for protection from line fault
conditions on the transmission bus line. These
devices offer optimum performance when used
with the SN75LBC173 or SN75LBC175
quadruple line receivers. The SN65LBC174 and
SN75LBC174 are available in the 16-terminal DIP
package (N) and the 20-terminal wide-body small
outline intergrated circuit (SOIC) package (DW).
15
3
14
4
13
5
12
6
11
7
10
8
VCC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
16
2
9
DW PACKAGE
(TOP VIEW)
description
The SN65LBC174 and SN75LBC174 are
monolithic, quadruple, differential line drivers with
3-state outputs. Both devices are designed to
meet the requirements of the Electronics Industry
Association Standard EIA-485. These devices
are optimized for balanced multipoint bus
transmission at data rates up to and exceeding
10 million bits per second. Each driver features
wide positive and negative common-mode output
voltage ranges, current limiting, and thermalshutdown protection, making it suitable for
party-line applications in noisy environments.
Both devices are designed using LinBiCMOS,
facilitating ultralow power consumption and
inherent robustness.
1
1
2
3
4
5
6
7
8
9
10
1A
1Y
NC
1Z
1,2EN
2Z
NC
2Y
2A
GND
20
19
18
17
16
15
14
13
12
11
VCC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
3A
NC – No internal connection
FUNCTION TABLE
(each driver)
INPUT
ENABLE
H
L
X
H
H
L
H = high level,
X = irrelevant,
OUTPUTS
Y
Z
H
L
Z
L
H
Z
L = low level,
Z = high impedance (off)
The SN75LBC174 is characterized for operation over the commercial temperature range of 0°C to 70°C. The
SN65LBC174 is characterized over the industrial temperature range of – 40°C to 85°C.
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.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 2001–2003, 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
