SN55LBC174_14 Datasheet, PDF (1/14 Pages) Texas Instruments – QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVER

SN55LBC174
QUADRUPLE LOWĆPOWER DIFFERENTIAL LINE DRIVER
SGLS082A − MARCH 1995 − REVISED JULY 2004
D Meets EIA Standard RS-485
D Designed for High-Speed Multipoint
Transmission on Long Bus Lines in Noisy
Environments
D Supports Data Rates up to and Exceeding
Ten Million Transfers Per Second
D Common-Mode Output Voltage Range of
−7 V to 12 V
D Positive- and Negative-Current Limiting
D Low Power Consumption . . . 1.5 mA Max
(Output Disabled)
description
J OR W PACKAGE
(TOP VIEW)
1A 1
1Y 2
1Z 3
1, 2EN 4
2Z 5
2Y 6
2A 7
GND 8
16 V_CC
15 4A
14 4Y
13 4Z
12 3, 4EN
11 3Z
10 3Y
9 3A
FK PACKAGE
(TOP VIEW)
The SN55LBC174 is composed of monolithic
quadruple differential line drivers with 3-state
outputs. This device is designed to meet the
requirements of the Electronics Industry
Association (EIA) Standard RS-485 and is
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
thermal-shutdown protection making it suitable
for party-line applications in noisy environments.
This device is designed using LinBiCMOS,
facilitating ultra-low power consumption and
inherent robustness.
3 2 1 20 19
1Z ₄
18 ^4Y
1, 2EN ₅
17 ^4Z
NC ₆
16 ^NC
2Z ₇
15 ^{3, 4EN}
2Y ₈
14 ^3Z
9 10 11 12 13
NC − No internal connection
The SN55LBC174 provides positive and negative-current limiting and thermal shutdown for protection from line
fault conditions on the transmission bus line. This device offers optimum performance when used with the
SN55LBC173 quadruple line receiver. The SN55LBC174 is available in the 16-pin CDIP package (J), the 16-pin
CPAK (W), or the 20-pin LCCC package (FK).
The SN55LBC174 is characterized for operation over the military temperature range of − 55°C to 125°C.
FUNCTION TABLE
(each driver)
INPUT
ENABLE
OUTPUTS
Y
Z
H
H
H
L
L
H
L
H
X
L
Z
Z
H = high level, L = low level, X = irrelevant,
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.
LinBiCMOS is a trademark of 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.
Copyright  2004, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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