參數(shù)資料
型號(hào): XRT91L32IQ
廠商: Exar Corporation
文件頁(yè)數(shù): 13/37頁(yè)
文件大?。?/td> 0K
描述: IC TXRX SONET/SDH 8BIT 100QFP
產(chǎn)品變化通告: XRT91L32IQ(TR) Obsolescence 12/Oct/2010
標(biāo)準(zhǔn)包裝: 90
類型: 收發(fā)器
規(guī)程: SONET/SDH
電源電壓: 3.3V
安裝類型: 表面貼裝
封裝/外殼: 100-BQFP
供應(yīng)商設(shè)備封裝: 100-QFP(14x20)
包裝: 托盤(pán)
XRT91L32
xr
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
REV. 1.0.2
18
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 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 "low" from the optical module
to force an LOS and mute the parallel receiver outputs as well (while DLOSDIS input is also low, see Figure 7.)
FIGURE 9. RECEIVE PARALLEL OUTPUT INTERFACE BLOCK
SONET Framer/ASIC
XRT91L32
STS-12/STM-4
or
STS-3/STM-1
Transceiver
RXPCLKO
RXDO[7:0]
8
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