參數(shù)資料
型號(hào): XRT91L31IQTR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 14/41頁(yè)
文件大小: 0K
描述: IC TXRX SONET/SDH 8BIT 64QFP
標(biāo)準(zhǔn)包裝: 1,000
類型: 收發(fā)器,多路復(fù)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: 帶卷 (TR)
XRT91L31
21
REV. 1.0.2
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
2.8
Receive Parallel Output Interface
The 8-bit Single-Ended LVTTL running at 77.76 Mbps (STS-12/STM-4) or 19.44 Mbps (STS-3/STM-1) parallel
data output of the receive path is used to interface to a SONET Framer/ASIC synchronized to the recovered
clock. A simplified block diagram is shown in Figure 9.
2.9
Disable Parallel Receive Data Output Upon LOS
The parallel receiver outputs are automatically pulled "Low" or forced to a logic state of "0" during a LOS
condition (DLOOP or ALOOP not activated) to prevent data chattering unless LOS detection is disabled by
asserting DLOSDIS and keeping LOSEXT input pin "high." In addition, the user can also assert LOSEXT input
pin from the optical module to force an LOS and mute the parallel receiver outputs as well when DLOSDIS is
not enabled (LOW), see Figure 7).
FIGURE 9. RECEIVE PARALLEL OUTPUT INTERFACE BLOCK
SONET Framer/ASIC
XRT91L31
STS-12/STM-4
or
STS-3/STM-1
Transceiver
RXPCLKO
RXDO[7:0]
8
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