參數(shù)資料
型號: XRT73R12IB
廠商: Exar Corporation
文件頁數(shù): 41/89頁
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 12CH 420TBGA
標(biāo)準(zhǔn)包裝: 40
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 12/12
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 420-LBGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 420-TBGA(35x35)
包裝: 托盤
XRT73R12
43
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.3
6.2.2
DIGITAL LOOPBACK
When the Digital Loopback is selected, the transmit clock TxClk_n and transmit data inputs (TxPOS_n &
TxNEG_n are looped back and output onto the RxClk_n, RxPOS_n and RxNEG_n pins as shown in
Figure 31.
6.2.3
REMOTE LOOPBACK
With Remote loopback activated as shown in Figure 32, the receive data on RTIP and RRing is looped back
after the Data and Clock Recovery to the transmit path using RxClk as transmit timing. The receive data is
also output via the RxPOS and RxNEG pins.
NOTE: Input signals on TxClk, TxPOS and TxNEG are ignored during Remote loopback.
FIGURE 31. DIGITAL LOOPBACK
FIGURE 32. REMOTE LOOPBACK
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxCLK
TxNEG
TxCLK
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxCLK
TxNEG
TxCLK
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
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