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參數(shù)資料
| 型號： | XRT91L32IQ-F |
| 廠商： | EXAR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER |
| 中文描述： | TRANSCEIVER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.70 MM HEIGHT, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 29/37頁 |
| 文件大?。?/td> | 417K |
| 代理商： | XRT91L32IQ-F |
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xr
REV. 1.0.2
XRT91L32
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
27
4.3
Analog Local Loopback (ALOOP) controls a more comprehensive version of digital local loopback in which the
point where the transmit data is looped back is moved all the way back to the high-speed receive I/O. The
transmit data from the transmit parallel interface TXDI[7:0] is serialized and presented to the high-speed
transmit output TXOP/N using the high-speed 622.08/155.52 MHz transmit clock generated from the clock
multiplier unit. In addition, the high-speed transmit data TXOP/N is looped back to the receive clock and data
recovery unit, replacing the RXIP/N. The signal is then processed by the CDR, and is sent through the serial to
parallel converter and presented at the low-speed receive parallel interface RXDO[7:0]. ALOOP is invoked by
asserting the ALOOP pin "High." A simplified block diagram of parallel remote loopback is shown in Figure 18.
Receive data mute upon "LOS
Analog Local Loopback
4.4
The serial remote loopback and the digital local loopback can be combined to form a split loopback. 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 high-speed serial receive data from RXIP/N is presented at the high speed
transmit output TXOP/N, and the high-speed recovered clock is selected to re-time the high speed transmit
data output. A simplified block diagram of parallel remote loopback is shown in Figure 19.
F
IGURE
19. S
PLIT
L
OOPBACK
Split Loopback
F
IGURE
18. A
NALOG
L
OCAL
L
OOPBACK
PISO
Re-Timer
SIPO
CDR
LVPECL
Input Drivers
Analog Local Loopback
Tx Parallel Input
Rx Parallel Output
Tx Serial Output
LVPECL
Output Drivers
PISO
Re-Timer
SIPO
CDR
LVPECL
Input Drivers
Split Loopback
Tx Parallel Input
Rx Parallel Output
Tx Serial Output
Rx Serial Input
LVPECL
Output Drivers
相關PDF資料 |
PDF描述 |
|---|---|
| XRT91L80 | 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L80_0507 | 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L80IB | 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L81 | 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L81IB | 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT91L32IQTR | 功能描述:LIN 收發(fā)器 PHY Transceiver RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8 |
| XRT91L32IQTR-F | 功能描述:LIN 收發(fā)器 PHY Transceiver RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8 |
| XRT91L33 | 制造商:EXAR 制造商全稱:EXAR 功能描述:STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT |
| XRT91L33AIG-F | 制造商:Exar Corporation 功能描述:CDR 155.52Mbps/622.08Mbps SONET/SDH 20-Pin TSSOP |
| XRT91L33ES | 功能描述:界面開發(fā)工具 Eval System for XRT91L33 Series RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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