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SN75LBC786_09

更新时间： 2024-11-06 02:58:27
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德州仪器 - TI 驱动
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7页 109K
描述
QUADRUPLE RS-423-B DRIVER/RECEIVER WITH LOOPBACK

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SN75LBC786_09 数据手册

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SN75LBC786  
QUADRUPLE RS-423-B DRIVER/RECEIVER WITH LOOPBACK  
SLLS184 – NOVEMBER 1994  
DW PACKAGE  
(TOP VIEW)  
Four Independent Drivers and Receivers  
Loopback Mode Functionally Self Tests  
Drivers and Receivers Without  
Disconnection From Line  
3A  
3Z  
2LB  
2Z  
1
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
2
Driver Slew Rate Controlled by a Single  
Resistor  
3LB  
4A  
2A  
3
1LB  
1Z  
4
4Z  
5
Internal Thermal-Overload Protection  
4LB  
1A  
6
RS-423-B Inputs and Outputs Designed to  
Withstand ±25 V  
V
R
7
SS  
WS  
GND  
4B  
V
8
DD  
ESD Protection Exceeds 2000 V Per  
MIL-STD-833C Method 3015  
1Y  
1B  
2Y  
9
4Y  
10  
11  
LinBiCMOS Process Technology  
3B  
3Y 12  
3C 13  
4C 14  
17 2B  
16 2C  
15 1C  
description  
The SN75LBC786 is a monolithic quadruple  
RS-423-B driver and receiver with integrated-  
loopback function. The operation of the  
SN75LBC786 is closely based on that of the SN75186. In normal operation, the device performs as four  
independent RS-423-B driver/receiver pairs designed to interface data-terminal equipment (DTE) with data  
circuit-terminating equipment (DCE). In loopback mode, the signal from each driver output is fed back via  
special circuitry into its associated receiver input, removing the need to locally disconnect cables and install a  
loopback connector. The receiver output signal is the same as the driver input signal.  
The SN75LBC786 is characterized for operation over the temperature range of 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
B
OUTPUTS  
LOOPBACK  
LB  
A
C
Z
Y
H
H
H
H
L
H
L
L
L
H
H
H
H
L
H
H
L
H
L
H
L
H
L
L
H
H
H
H
L
H
L
L
L
H
H
L
L
H
H
?
?
?
?
H
L
H
L
H
L
L
L
H
X
X
X
X
L
H
L
L
H = high level, L = low level, X = irrelevant, ? = indeterminate  
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 1994, 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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567

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