參數(shù)資料
型號(hào)： XRT71D04
廠商： Exar Corporation
英文描述： 4-Channel E3/DS3/STS-1 Jitter Attenuator,STS-1 to DS3 Desynchronizer(達(dá)到E3/DS3/STS-1振蕩要求的4通道振蕩衰減器)
中文描述： 4通道E3/DS3/STS-1抖動(dòng)衰減器，STS - 1的到DS3 Desynchronizer（達(dá)到E3/DS3/STS-1振蕩要求的4通道振蕩衰減器）
文件頁(yè)數(shù)： 12/21頁(yè)
文件大?。?/td> 223K
代理商： XRT71D04
XRT71D04
4 CHANNEL E3/DS3/STS-1 JITTER ATTENUATOR, STS-1 TO DS3 DESYNCHRONIZER
REV. P1.0.2
á
PRELIMINARY
11
The XRT71D04 DS3/E3 Jitter Attenuator IC consists
of the following functional blocks:
Timing Control Block
The Jitter-Attenuator PLL
The 2-Channel 16/32 Bit FIFO.
BACKGROUND INFORMATION:
DEFINITION OF JITTER
One of the most important and least understood mea-
sures of clock performance is jitter. The International
Telecommunication Union defines jitter as short term
variations of the significant instants of a digita signal
from their ideal positions in time. Jitter can occur due
to any of the following:
1) Imperfect timing recovery circuit in the system
2) Cross-talk noise
3) Inter-symbol interference/Signal Distortion
SONET STS-1 to DS3 MAPPING
SONET equipment jitter criteria are specified as:
i) Jitter Transfer
ii) Jitter Tolerance
iii) Jitter Generation
JITTER TRANSFER CHARACTERISTICS:
The primary purpose of jitter transfer requirements is
to prevent performance degradations by limiting the
accummulation of jitter through the system such that
it does not exceed the network interface jitter require-
ments. Thus, it is more important that a system meet
the jitter transfer criteria for relatively high input jitter
amplitudes. The jitter transferred through the system
must be under the jitter mask for any input jitter ampli-
tude within the range as shown in Figure 5
F
IGURE
4. I
LLUSTRATION
OF
OF
A
TYPICAL
C
HANNEL
-
N
OF
THE
XRT71D04 (
CONFIGURED
TO
OPERATE
IN
THE
H
OST
M
ODE
)
HOST
RST
16/32 Bit FIFO
Microprocessor Serial
Interface
Timing Control Block /
Phase locked Loop
Write Clock
Read Clock
RRCLKn
RRPOSn
RRNEGn
RRCLKES
FLn
RCLKn
RPOSn
RNEGn
ICT
CS SDI SDO SClk
MClkn
Smoothed
Clock
Jittery
Clock
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XRT71D04ES 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 4CH T3/E3 JA w/T73LC04A 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
XRT71D04IV 功能描述:時(shí)鐘合成器/抖動(dòng)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
XRT71D04IVTR 功能描述:時(shí)鐘合成器/抖動(dòng)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(kāi)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(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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