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TP3403 数据表(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 TP3403
功能描述  DASL Digital Adapter for Subscriber Loops
Download  16 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

TP3403 数据表(HTML) 1 Page - National Semiconductor (TI)

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TLH9264
December 1991
TP3401 TP3402 TP3403
DASL Digital Adapter for Subscriber Loops
General Description
The TP3401 TP3402 and TP3403 are complete monolithic
transceivers for data transmission on twisted pair subscriber
loops They are built on National’s double poly microCMOS
process and require only a single a5 Volt supply Alternate
Mark Inversion (AMI) line coding in which binary ‘1’s are
alternately transmitted as a positive pulse then a negative
pulse is used to ensure low error rates in the presence of
noise with lower emi radiation than other codes such as Bi-
phase (Manchester)
Full-duplex transmission at 144 kbs is achieved on a single
twisted wire pair using a burst-mode technique (Time Com-
pression Multiplexed) Thus the device operates as an ISDN
‘U’ Interface for short loop applications typically in a PBX
environment providing transmission for 2 B channels and 1
D channel On
24 cable the range is at least 18 km
(6k ft)
System timing is based on a MasterSlave configuration
with the line card end being the Master which controls loop
timing and synchronisation All timing sequences necessary
for loop activation and de-activation are generated on-chip
Selection of Master and Slave mode operation is pro-
grammed via the Microwire Control Interface
A 2048 MHz clock which may be synchronized to the sys-
tem clock controls all transmission-related timing functions
For the TP3401 this clock must be provided from an exter-
nal source the TP3402 includes an oscillator circuit requir-
ing an external crystal The TP3403 includes the functions
of both the TP3401 and the TP3402
Features
Complete ISDN PBX 2-Wire Data Transceiver including
Y
2 B plus D channel interface for PBX U Interface
Y
144 kbs full-duplex on 1 twisted pair using Burst Mode
Y
Loop range up to 6 kft ( 24AWG)
Y
Alternate Mark Inversion coding with transmit filter and
scrambler for low emi radiation
Y
Adaptive line equalizer
Y
On-chip timing recovery no external components
Y
Standard TDM interface for B channels
Y
Separate interface for D channel
Y
2048 MHz master clock
Y
Driver for line transformer
Y
4 loop-back test modes
Y
Single a5V supply
Y
MICROWIRETM compatible serial control interface
Y
Applications in
PBX Line Cards
Terminals
Regenerators
Y
Available in both 20-pin DIP and 28-pin PLCC
Block Diagram
TLH9264 – 1
Note 1
TP3401 only
TRI-STATE
is a registered trademark of National Semiconductor Corporation
MICROWIRETM is a trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M115Printed in U S A


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