- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372949 > XRT71D04IV (EXAR CORP) 4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER PDF資料下載
參數(shù)資料
| 型號： | XRT71D04IV |
| 廠商： | EXAR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | 4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER |
| 中文描述： | DATACOM, PCM JITTER ATTENUATOR, PQFP80 |
| 封裝： | 14 X 14 MM, 1.40 MM HEIGHT, TQFP-80 |
| 文件頁數(shù)： | 16/22頁 |
| 文件大?。?/td> | 254K |
| 代理商： | XRT71D04IV |
XRT71D03
3 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER
REV. 1.1.1
á
14
An asynchronous mapping for DS3 into STS-1 SPE is
defined for clear-channel transport of DS3 signals
that meet the DSX-3 requirements in the GR-499-
CORE.
When the input data has a rate lower than the output
data rate, the positive stuffing will occur. The stuffing
mechanism that generates the C-bits is implement-
ed in a desynchronizer that has the jitter output less
than 0.4 UIpp assuming no jitter or wander at the in-
put of the synchronizer and no pointer adjustments. A
block diagram of the Desynchronizer is shown in
Figure 8.
The elastic store accepts the STS-1 data stream and
a gapped clock. The gaps in the input clock inhibit the
elastic store from writing all but DS3 payload data.
The bit leaking circuit stores incoming STS-1 pointer
adjustments into a queue and leaks them out of the
desynchronizer one bit at a time.
STS-Nc signal is used to transport higher rate sig-
nals. However,the digital signals that SONET carries
do not fit in the SPE perfectly.
F
IGURE
8. XRT71D03 D
ESYNCHRONIZER
B
LOCK
D
IAGRAM
STS-N
STS-N
STS-N
Clock
Clock
Recovery
Descramble/
Demux
STS-1
Nth STS-1
OH
Processing
STS-1
Section &
Line Overhead
Pointer
Processing
Elastic
Store
STS-1
Dejittering &
Pointer
Adjustment
STS-1
gapped clock
STS-1
gapped clock
STS-1
reference clock
DS3 payload
(dejittered)
Stuff Control
XRT71D03
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT7298IP | PCM Transmitter |
| XRT7298IW | PCM Transmitter |
| XRT72L71IQ | Telecommunication IC |
| XRT72L73IB | Telecommunication IC |
| XRT72L74IB | Telecommunication IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT71D04IVTR | 功能描述:時鐘合成器/抖動清除器 4CH E3/DS3/STS1 JIT ATTEN DE-SYNCH RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| XRT7250 | 制造商:EXAR 制造商全稱:EXAR 功能描述:DS3/E3 FRAMER IC |
| XRT7250ES-PCI | 功能描述:界面開發(fā)工具 Evaluation Board for XRT7250 Series RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XRT7250IQ100 | 制造商:EXAR 制造商全稱:EXAR 功能描述:DS3/E3 FRAMER IC |
| XRT7288 | 制造商:EXAR 制造商全稱:EXAR 功能描述:CEPT1 Line Interface |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。