参数资料
型号: XRT91L80IB
厂商: Exar Corporation
文件页数: 14/46页
文件大小: 0K
描述: IC TXRX SONET/SDH 4BIT 196STBGA
产品变化通告: XRT91L80IB Obsolescence 6/Sept/2010
标准包装: 126
类型: 收发器
规程: SONET/SDH
电源电压: 3.3V
安装类型: 表面贴装
封装/外壳: 196-LFBGA
供应商设备封装: 196-STBGA(12x12)
包装: 托盘
xr
XRT91L80
REV. 1.0.0
2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
25
4.3
Digital Local Loopback
The digital local loopback is activated when the DLOOP signal is set "High." When digital local loopback is
activated, the high-speed data from the output of the parallel to serial converter is looped back and presented
to the high-speed input of the receiver serial to parallel converter. The CMU output is also looped back to the
receive section and is used to synchronize the transfer of the data through the receiver. In Digital loopback
mode, the transmit data from the transmit parallel interface TXDI[3:0]P/N is serialized and presented to the
high-speed transmit output TXOP/N using the high-speed 2.488/2.666 GHz transmit clock which is generated
from the clock multiplier unit and presented to the input of the Retimer and SIPO. A simplified block diagram of
digital loopback is shown in Figure 18.
FIGURE 18. DIGITAL LOOPBACK
PISO
Re-Timer
LVPECL
Output Drivers
LVPECL
Input Drivers
CDR
SIPO
Rx Parallel Output
Tx Serial Output
Digital Loopback
Tx Parallel Input
PISO
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相关代理商/技术参数
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XRT91L81 制造商:EXAR 制造商全称:EXAR 功能描述:2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L81IB 制造商:EXAR 制造商全称:EXAR 功能描述:2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L82 制造商:EXAR 制造商全称:EXAR 功能描述:2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
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