參數(shù)資料
型號(hào)： XRT91L30_0611
廠商： Exar Corporation
英文描述： STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
中文描述： STS-12/STM-4或STS-3/STM-1的SONET / SDH收發(fā)器
文件頁(yè)數(shù)： 19/39頁(yè)
文件大?。?/td> 440K
代理商： XRT91L30_0611
xr
REV. 1.0.1
XRT91L30
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
17
condition is declared. This acts as a receive data mute upon LOS function to prevent random noise from being
misinterpreted as valid incoming data.
2.6
A Frame and Byte Boundary Detection circuit searches the incoming data channel for three consecutive A1
(0xF6 Hex) bytes followed by three consecutive A2 (0x28 Hex) bytes. The detector operates under the control
of the OOF (Out of Frame) signals provided from the SONET Framer. Detection is enabled when OOF is held
"High" and remains active until OOF goes "Low." When framing pattern detection is enabled, the framing
pattern is used to locate byte and frame boundaries in the incoming receive data stream. The receive serial-to-
parallel converter block uses the located byte boundary to assemble the incoming data stream into bytes for
output on the parallel data output bus RXDO[7:0]. The frame boundary is reported on the frame pulse
(FRAMEPULSE) output at the onset of detecting the third A2 byte pattern when any serial 48-bit pattern
matching the framing pattern is detected on the incoming data stream. While in the pattern search and
detection state and so long is OOF is active, the frame pulse (FRAMEPULSE) output is activated for one byte
clock cycle (RXPCLKO = 12.86 ns pulse duration for STS-12/STM-4 or 51.44 ns pulse duration for STS-3/
STM-1) anytime a 48-bit pattern matching the framing pattern is detected on the incoming data stream. Once
the SONET Framer Overhead Circuitry has verified that frame and byte synchronization are correct, the OOF
input pin should be de-asserted by the SONET Framer to disable the XRT91L30 frame search process from
trying to synchronize repeatedly and to de-activate FRAMEPULSE. When the XRT91L30’s framing pattern
detection is disabled upon the de-assertion of OOF input pin from the SONET Framer, the byte boundary will
lock to the detected location and will remain locked to that location found when detection was previously
enabled.
SONET Frame Boundary Detection and Byte Alignment Recovery
2.7
During STS-12/STM-4 operation, the SIPO is used to convert the 622.08 Mbps serial data input to 77.76 Mbps
parallel data output which can interface to a SONET Framer/ASIC. If the XRT91L30 is operating in STS-3/
STM-1, the SIPO will convert the 155.52 Mbps serial data input to 19.44 Mbps parallel data output. The SIPO
Receive Serial Input to Parallel Output (SIPO)
F
IGURE
7. LOS D
ECLARATION
CIRCUIT
Internal LOS Detect
DLOSDIS
LOSEXT ( SD )
LOS Declaration
相關(guān)PDF資料
PDF描述
XRT91L306 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30IQ STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L31 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L31IQ STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT91L306 制造商:EXAR 制造商全稱:EXAR 功能描述:STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30ES 功能描述:總線收發(fā)器 RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
XRT91L30IQ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT91L30IQ-F 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 8-Bit TTL 3.3V temp -45 to 85C;UART RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT91L30IQ-F 制造商:Exar Corporation 功能描述:SONET Transceiver IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*