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參數資料
| 型號： | TP3401 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | DASL Digital Adapter for Subscriber Loops |
| 中文描述： | DASL適配器數字用戶環路 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 249K |
| 代理商： | TP3401 |
TL/H/9264
T
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
a
5 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 kb/s 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
Y
24 cable, the range is at least 1.8 km
(6k ft).
System timing is based on a Master/Slave 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 2.048 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
ê
Interface
Y
144 kb/s full-duplex on 1 twisted pair using Burst Mode
Y
Loop range up to 6 kft (
Y
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
2.048 MHz master clock
Y
Driver for line transformer
Y
4 loop-back test modes
Y
Single
a
5V supply
Y
MICROWIRE
TM
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
TL/H/9264–1
Note 1:
TP3401 only.
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 |
|---|---|
| TP3402 | DASL Digital Adapter for Subscriber Loops |
| TP3403 | DASL Digital Adapter for Subscriber Loops |
| TP3404 | Quad Digital Adapter for Subscriber Loops (QDASL) |
| TP3404V | Quad Digital Adapter for Subscriber Loops (QDASL) |
| TP3406 | DASL Digital Adapter for Subscriber Loops |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TP3401S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRANSISTOR | BJT | NPN | 200MA I(C) | FO-58VAR |
| TP3402 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:DASL Digital Adapter for Subscriber Loops |
| TP3402J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN Line Interface |
| TP3403 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:DASL Digital Adapter for Subscriber Loops |
| TP3403V | 功能描述:通信集成電路 - 若干 Digital Adptr for Subscriber Loops RoHS:否 制造商:Maxim Integrated 類型:Transport Devices 封裝 / 箱體:TECSBGA-256 數據速率:100 Mbps 電源電壓-最大:1.89 V, 3.465 V 電源電壓-最小:1.71 V, 3.135 V 電源電流:50 mA, 225 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
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