SN95176B Datasheet, PDF (1/15 Pages) Texas Instruments – DIFFERENTIAL BUS TRANSCEIVER

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• Bidirectional Transceiver
• Suitable for Most EIA Standards RS-422-A
and RS-485 Applications
• Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
• 3-State Driver and Receiver Outputs
• Individual Driver and Receiver Enables
• Wide Positive and Negative Input/Output
Bus Voltage Ranges
• Driver Output Capability . . . ± 60 mA Max
• Thermal Shutdown Protection
• Driver Positive- and Negative-Current
Limiting
• Receiver Input Sensitivity . . . ± 200 mV
• Receiver Input Hysteresis . . . 50 mV Typ
• Operates From Single 5-V Supply
• Low Power Requirements
description
SN95176B
DIFFERENTIAL BUS TRANSCEIVER
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SGLS026A − MARCH 1989 − REVISED JUNE 1995
JG PACKAGE
(TOP VIEW)
R1
RE 2
DE 3
D4
8 V_CC
7B
6A
5 GND
W PACKAGE
(TOP VIEW)
R₁
NC 2
RE 3
NC 4
DE 5
NC 6
D7
14 V_CC
13 NC
12 B
11 NC
10 A
9 NC
8 GND
FK PACKAGE
(TOP VIEW)
The SN95176B differential bus transceiver is a
monolithic integrated circuit designed for bi-
directional data communication on multipoint bus
transmission lines. The transceiver is suitable for
most RS-422-A and RS-485 applications to the
3 2 1 20 19
NC 4
18 NC
RE 5
17 B
extent of the specified data sheet characteristics
NC 6
16 NC
and operating conditions.
DE 7
15 A
The SN95176B combines a 3-state differential
NC 8
14 NC
9 10 11 12 13
line driver and a differential input line receiver,
both of which operate from a single 5-V power
supply. The driver and receiver have active-high
and active-low enables, respectively, that can be
NC − No internal connection
externally connected together to function as a
direction control. The driver differential outputs and the receiver differential inputs are connected internally to
form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus whenever the
driver is disabled or V_CC = 0. These ports feature wide positive and negative common-mode voltage ranges
making the device suitable for party-line applications.
The driver is designed to handle loads up to 60 mA of sink or source current. The driver features positive- and
negative-current limiting and thermal shutdown for protection from line fault conditions. Thermal shutdown is
designed to occur at a junction temperature of approximately 150°C. The receiver features a minimum input
impedance of 12 kΩ, an input sensitivity of ± 200 mV, and a typical input hysteresis of 50 mV.
The SN95176B is characterized for operation from − 40°C to 110°C.
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
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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