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TP3406NNSCN/a2avaiDASL Digital Adapter for Subscriber Loops
TP3406VNSN/a35avaiDASL Digital Adapter for Subscriber Loops
TP3406VNSCN/a40avaiDASL Digital Adapter for Subscriber Loops


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TP3406V ,DASL Digital Adapter for Subscriber LoopsFeaturesThe TP3406 is a complete monolithic transceiver for data Complete ISDN PBX 2-Wire Data Tran ..
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TP3406N-TP3406V
DASL Digital Adapter for Subscriber Loops
TL/H/11725
TP3406
DASL
Digital
Adapter
for
Subscriber
Loops
November 1992
TP3406
DASL Digital Adapter for Subscriber Loops
General Description
The TP3406isa complete monolithic transceiverfor data
transmissionon twistedpair subscriber loops.Itis builton
National’s double poly microCMOS process, and requires
only asingle a5Voltsupply. Alternate MarkInversion (AMI)
line coding,in which binary‘1’sare alternately transmitteda positive pulse thena negative pulse,is usedto ensure
low error ratesinthe presenceof noise withloweremi radia-
tion than other codes suchas Bi-phase (Manchester).
Full-duplex transmissionat144 kb/sis achievedona single
twisted wirepair usinga burst-mode technique (Time Com-
pressionMultiplexed). Thusthe device operates asan ISDN
‘U’ Interfacefor short loop applications, typicallyina PBX
environment, providing transmissionfor2B channelsand1 channel.On Ý24 cable,the rangeisupto800 meters.
System timingis basedona Master/Slave configuration,
withtheline cardend beingthe Master which controls loop
timingand synchronisation.All timing sequences necessary
for loop activationand de-activationare generated on-chip.
Selectionof Master and Slave mode operationis pro-
grammedviathe Microwire Control Interface. 2.048 MHz clock, which maybe synchronizedtothesys-
tem clock, controlsall transmission-related timing functions.
Features
Complete ISDN PBX 2-Wire Data Transceiver including:2B plusD channel interfacefor PBXUÊ Interface 144 kb/s full-duplexon1 twistedpair using Burst Mode Loop rangeupto800 meters (Ý24AWG) Alternate Mark Inversion coding with transmit filter and
scramblerforlowemi radiation Adaptiveline equalizer On-chip timing recovery,no external components Standard TDM interfaceforB channels Separate interfaceforD channel 2.048 MHz master clock Driverforline transformer4 loop-backtest modes Single a5V supply MICROWIRETM compatible serial control interface Applicationsin:
PBX Line Cards
Terminals
Regenerators Availablein 28-pin PLCC Package
Block Diagram
TL/H/11725–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation
MICROWIRETMis atrademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
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