參數(shù)資料
型號(hào)： S3028
廠商： Applied Micro Circuits Corp.
英文描述： SONET/SDH/ATM OC-3/12 Transceiver(帶片上鎖相環(huán)，頻率可選的SONET/SDH收發(fā)器（完全集成OC-3/12接口器件）)
中文描述： 的SONET / SDH / ATM的OC-3/12收發(fā)器（帶片上鎖相環(huán)，頻率可選的的SONET / SDH收發(fā)器（完全集成OC-3/12接口器件））
文件頁(yè)數(shù)： 19/20頁(yè)
文件大?。?/td> 167K
代理商： S3028
19
S3028
SONET/SDH/ATM OC-3/OC-12 TRANSCEIVER
December 13, 1999 / Revision H
INTRODUCTION
In some applications it is necessary to “forward
clock” the data in a SONET/SDH system. In this
application the reference clock from which the high
speed serial clock is synthesized and the parallel
data clock both originate from the same (usually
TTL/CMOS) clock source. This application note ex-
plains how the AMCC S3028 can be configured to
operate in this mode.
Clock Control Logic Description
The timing control logic in the S3028 automatically
generates an internal load signal which has a fixed
relationship to the reference clock. The logic takes
into account the variation of the reference clock to the
internal load signal over temperature and voltage.
The connections required to implement the design
are shown in Figure 14, and the timing specifications
are shown in Figure 15. The setup and hold times for
the reference clock to the data must be met by the
controller ASIC. It is recommended to latch the data
on the falling edge of the reference clock in order to
meet the required specifications.
Possible Problems
In order to meet the jitter generation specifications
required by SONET, the jitter of the reference clock
must be minimized. It may be difficult to meet the
SONET jitter generation specifications using a refer-
ence clock input with a TTL reference source.
Figure 14. S3028 with Data Clocked by Reference Clock
Figure 15. Data Timing with Respect to Reference Clock
PICLK
PIN [7:0]
tsu
tsu = 1.5 ns
tH = 1 ns
tH
ASIC
Data
PIN[7:0]
PICLK
PECL
2
REFCLK
Serial Data
TTL/PECL
Converter
tpd < 3.5 ns
S3028
8
相關(guān)PDF資料
PDF描述
S3029 Clock Synthesis and Recovery Unit(數(shù)據(jù)傳送速率155 MBit/S的時(shí)鐘合成和恢復(fù)單元)
S302H S302H
S302H3 S302H
S302H3B S302H
S302H3K S302H
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S3029 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:SONET/SDH/ATM 155 MBIT/S QUAD TRANSCEIVER
S3029A 制造商:AppliedMicro 功能描述:
S302AB 制造商:Cinch Connectors 功能描述:Conn Wire to Board SKT 2 POS Solder Lug ST Panel Mount
S-302-AB 功能描述:Jones 插頭和插槽 2C PNL MNT SOCKET RoHS:否 制造商:Molex 產(chǎn)品類型:Socket Connectors 系列:Beau 位置/觸點(diǎn)數(shù)量:8 電壓額定值:250 V 電流額定值:10 A 外殼材料:Thermoplastic 觸點(diǎn)材料:Phosphor Bronze 觸點(diǎn)電鍍:Tin-Lead
S-302-ABP 制造商:Molex 功能描述:
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