DS96176CN ,RS-485/RS-422 Differential Bus TransceiverFeaturesRS-422A.n Bidirectional transceiver®The DS96176 combines a TRI-STATE differential line driv ..
DS96177CN ,RS-485/RS-422 Differential Bus Repeaterfeatures thermal shutdown for protection from linen Receiver input high impedancefault conditions. ..
DS9636ACJ ,RS-423 Dual Programmable Slew Rate Line DriverFeaturessystems where signal wave shaping is desired. The outputn Programmable slew rate limitingsl ..
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ED1402 ,NPN general purpose transistor
ED1402B ,NPN general purpose transistor
ED1402B ,NPN general purpose transistor
ED1402C ,NPN general purpose transistor
ED1402C ,NPN general purpose transistor
ED1402E ,NPN general purpose transistor
DS96176CN
RS-485/RS-422 Differential Bus Transceiver
DS96176
RS-485/RS-422 Differential Bus Transceiver
General DescriptionThe DS96176 DifferentialBus Transceiverisa monolithicin-
tegrated circuit designedfor bidirectional data communica-
tionon balanced multipoint bus transmission lines. The
transceiver meets EIA Standard RS-485as wellas
RS-422A.
The DS96176 combinesa TRI-STATE® differentialline driver
anda differential inputline receiver, bothof which operate
froma single 5.0V power supply. The driver and receiver
havean active Enable thatcanbe externally connectedto
functionasa direction control.The driver differential outputs
andthe receiver differential inputsare internally connected form differential input/output (I/O)bus portsthatarede-
signedto offer minimum loadingtothebus wheneverthe
driveris disabledor when VCC=0V. These ports feature
wide positive and negative common mode voltage ranges,
makingthe device suitablefor multipoint applicationsin
noisy environments.
The driverisdesignedto handle loadsupto60 mAofsinkor
source current. The driver features positive and negative
current-limitingand thermal shutdown forprotection fromline
fault conditions. Thermal shutdownis designedto occurat
junction temperatureof approximately 160˚C.The receiver
featuresa typical input impedanceof15kΩ,an input sensi-
tivityof ±200mV,anda typical input hysteresisof50mV.
The DS96176canbe usedin transmissionline applications
employingthe DS96172 andthe DS96174 quad differential
line driversandthe DS96173and DS96175 quad differential
line receivers.
Features Bidirectional transceiver MeetsEIA Standard RS-422Aand RS-485 Designedfor multipoint transmission TRI-STATE driverand receiver enables Individual driverand receiver enables Wide positiveand negative input/outputbus voltage
ranges Driver output capability ±60mA Maximum Thermal shutdown protection Driver positiveand Negative current-limiting High impedance receiver input Receiver input sensitivityof ±200mV Receiver input hysteresisof50mV typical Operates from single 5.0V supply Low power requirements
Connection Diagram
Function Table
Driver
Input Enable Outputs DE A B H L L H Z Z
Receiver
Differential Inputs Enable Output
A-B RE RVID≥ 0.2V L H
VID≤ −0.2V L L Z= HighLevel=Low Level= Immaterial=High Impedance(off)
TRI-STATE®isa registeredtrademark ofNationalSemiconductorCorporation.
8–LeadDIPDS009630-1
Top View
Order Number DS96176CN
SeeNS Package Number N08EMay 1998
DS96176
RS-485/RS-422
Differential
Bus
ransceiver 1998 National Semiconductor Corporation DS009630
