參數(shù)資料
型號: XRT91L31IQ
廠商: Exar Corporation
文件頁數(shù): 39/41頁
文件大?。?/td> 0K
描述: IC TXRX SONET/SDH 8BIT 64QFP
標準包裝: 160
類型: 收發(fā)器,多路復用器
PLL:
主要目的: 以太網(wǎng),SONET/SDH
輸入: LVCMOS,LVPECL,LVTTL
輸出: LVCMOS,LVPECL,LVTTL
電路數(shù): 1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 622.08MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-FQFP
供應(yīng)商設(shè)備封裝: 64-PQFP(10x10)
包裝: 托盤
XRT91L31
7
REV. 1.0.2
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
CDRREFSEL
LVTTL,
LVCMOS
I
60
Clock and Data Recover Unit Reference Frequency Select
Selects the Clock and Data Recovery Unit reference frequency
based on the table below.
"Low" = CDR uses CMU’s reference clock
"High" = CDR reference clock from CDRAUXREF-
CLK
NOTE:
CDRAUXREFCLK requires accuracy of 77.76 MHz
ppm.
LOOPTIME
LVTTL,
LVCMOS
I
2
Loop Timing Mode
When the loop timing mode is activated the external reference
clock to the input of the Retimer is replaced with the high-speed
recovered receive clock from the CDR.
"Low" = Disabled
"High" = Loop timing Activated
CDRDIS
LVTTL,
LVCMOS
I
12
Clock and Data Recovery Unit Disable
Active "High." Disables internal Clock and Data Recovery unit.
Received serial data bypasses the integrated CDR block.
RXINP/N is then sampled on the rising edge of externally
recovered differential clock XRXCLKIP/N coming from the opti-
cal module.
"Low" = Internal CDR unit is Enabled
"High" = Internal CDR unit is Disabled and Bypassed
PIN DESCRIPTION
NAME
LEVEL
TYPE
PIN
DESCRIPTION
CDRREF-
SEL
STS12/
STS3
CDRAUXREF-
CLK Frequency
Data Rate
0
CDR uses CMU’s reference clock
(see CMUFREQSEL pin)
1
0
77.76 MHz
STS-3/STM-1
155.52 Mbps
1
77.76 MHz
STS-12/STM-4
622.08 Mbps
200
+
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XRT91L31IQ-F 制造商:Exar Corporation 功能描述:SONET Transceiver IC
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XRT91L32 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