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SN75179B Datasheet(Fiches technique) 1 Page - Texas Instruments

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Numéro de pièce SN75179B
Description  DIFFERENTIAL DRIVER AND RECEIVER PAIR
Télécharger  9 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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SN75179B
DIFFERENTIAL DRIVER AND RECEIVER PAIR
SLLS003E – OCTOBER 1985 – REVISED JUNE 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Meets or Exceeds the Requirements of
TIA/EIA-422-B, TIA/EIA-485-A, and ITU
Recommendation V.11
D Bus Voltage Range...–7 V to 12 V
D Positive- and Negative-Current Limiting
D Driver Output Capability...60 mA Max
D Driver Thermal-Shutdown Protection
D Receiver Input Impedance...12 kΩ Min
D Receiver Input Sensitivity... ±200 mV
D Receiver Input Hysteresis...50 mV Typ
D Operates From Single 5-V Supply
D Low Power Requirements
description
The SN75179B is a differential driver and receiver pair designed for balanced transmission-line applications
and meets TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. It is designed to improve the
performance of full-duplex data communications over long bus lines.
The SN75179B driver output provides limiting for both positive and negative currents. The receiver features high
input impedance, input hysteresis for increased noise immunity, and input sensitivity of
±200 mV over a
common-mode input voltage range of – 7 V to 12 V. The driver provides thermal shutdown for protection from
line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150
°C.
The SN75179B is designed to drive current loads of up to 60 mA maximum.
The SN75179B is characterized for operation from 0
°C to 70°C.
Function Tables
DRIVER
INPUT
OUTPUTS
D
Y
Z
H
H
L
L
L
H
RECEIVER
DIFFERENTIAL INPUTS
OUTPUT
A – B
R
VID ≥ 0.2 V
H
– 0.2 V < VID < 0.2 V
?
VID ≤ – 0.2 V
L
Open
?
H = high level, L = low level, ? = indeterminate
Copyright
© 1998, 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
8
7
6
5
VCC
R
D
GND
A
B
Z
Y
D OR P PACKAGE
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