SN75LBC786_09 Datasheet, PDF (1/8 Pages) Texas Instruments – QUADRUPLE RS-423-B DRIVER/RECEIVER WITH LOOPBACK

SN75LBC786
QUADRUPLE RS-423-B DRIVER/RECEIVER WITH LOOPBACK
SLLS184 – NOVEMBER 1994
D Four Independent Drivers and Receivers
D Loopback Mode Functionally Self Tests
DW PACKAGE
(TOP VIEW)
Drivers and Receivers Without
Disconnection From Line
D Driver Slew Rate Controlled by a Single
Resistor
D Internal Thermal-Overload Protection
3A ₁
3Z ₂
3LB ₃
4A 4
4Z 5
28 ^2LB
27 ^2Z
26 ^2A
25 1LB
24 1Z
D RS-423-B Inputs and Outputs Designed to
Withstand ± 25 V
D ESD Protection Exceeds 2000 V Per
MIL-STD-833C Method 3015
D LinBiCMOS™ Process Technology
4LB 6
V_SS 7
GND 8
4B 9
4Y 10
3B 11
23 1A
22 R_WS
21 V_DD
20 1Y
19 1B
18 2Y
description
3Y 12
3C 13
17 2B
16 2C
The SN75LBC786 is a monolithic quadruple
4C 14 15 1C
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
LOOPBACK
LB
INPUTS
A
BC
OUTPUTS
Z
Y
H
L
LH
H
H
H
H
LH
H
L
H
L
HL
L
H
H
H
HL
L
L
H
L
LL
?
H
H
H
LL
?
L
H
L
HH
?
H
H
H
HH
?
L
L
L
XX
L
L
L
H
XX
H
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.
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.
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Copyright © 1994, Texas Instruments Incorporated
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