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參數(shù)資料
| 型號： | TP3404 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Quad Digital Adapter for Subscriber Loops (QDASL) |
| 中文描述： | 四適配器數(shù)字用戶環(huán)路（QDASL） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 212K |
| 代理商： | TP3404 |
TL/H/11924
T
PRELIMINARY
July 1994
TP3404
Quad Digital Adapter for Subscriber Loops (QDASL)
General Description
The TP3404 is a combination 4-line transceiver for voice
and data transmission on twisted pair subscriber loops, typi-
cally in PBX line card applications. It is a companion device
to the TP3401/2/3 DASL single-channel transceivers. In
addition to 4 independent transceivers, a time-slot assign-
ment circuit is included to support interfacing to the system
backplane.
Each QDASL line operates as an ISDN ‘‘U’’ Interface for
short loop applications, typically in a PBX environment, pro-
viding transmission for 2 B channels and 1 D channel.
Full-duplex transmission at 144 kb/s is achieved on single
twisted wire pairs using a burst-mode technique (Time Com-
pression Multiplexed). All timing sequences necessary for
loop activation and de-activation are generated on-chip.
Alternate Mark Inversion (AMI) line coding is used to ensure
low error rates in the presence of noise with lower emi radia-
tion than other codes such as Biphase (Manchester). On
Y
24 AWG cable the range is at least 1.8 km (6k ft).
Features
4 COMPLETE ISDN PBX 2-WIRE DATA TRANSCEIVERS
INCLUDING:
Y
Quad 2 B plus D channel interface for PBX ‘‘U’’
interface
Y
144 kb/s full-duplex on 1 twisted pair using Burst Mode
Transmission Technique
Y
Loop range up to 6 kft (
Y
24AWG)
Y
Alternate Mark Inversion coding with transmit Pulse
Shaping DAC, Smoothing Filter, and scrambler for low
emi radiation
Y
Adaptive line equalizer
Y
On-chip timing recovery, no external components
Y
Programmable Time-Slot Assignment TDM interface for
B channels
Y
Separate interface for D channel with Programmable
Sub-Slot Assignment
Y
4.096 MHz master clock
Y
4 loop-back test modes
Y
MICROWIRE
TM
compatible serial control interface
Y
5V operation
Y
28-pin PLCC package
Block Diagram
TL/H/11924–1
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
MICROWIRE
TM
is a trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
相關PDF資料 |
PDF描述 |
|---|---|
| TP3404V | Quad Digital Adapter for Subscriber Loops (QDASL) |
| TP3406 | DASL Digital Adapter for Subscriber Loops |
| TP3406V | DASL Digital Adapter for Subscriber Loops |
| TP3410 | TP3410 ISDN Basic Access Echo-Cancelling 2B1Q U Transceiver |
| TP3410J | TP3410 ISDN Basic Access Echo-Cancelling 2B1Q U Transceiver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TP3404V | 功能描述:ISDN 接口 RoHS:否 制造商:Texas Instruments 封裝:Tube |
| TP3404V/63 | 功能描述:ISDN 接口 RoHS:否 制造商:Texas Instruments 封裝:Tube |
| TP3404V/63SN | 功能描述:ISDN 接口 RoHS:否 制造商:Texas Instruments 封裝:Tube |
| TP3404V/NOPB | 功能描述:ISDN 接口 RoHS:否 制造商:Texas Instruments 封裝:Tube |
| TP3406 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:DASL Digital Adapter for Subscriber Loops |
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