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參數(shù)資料
| 型號(hào)： | XRT91L34IV |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 6/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MULTIRATE CDR QUAD 128LQFP |
| 標(biāo)準(zhǔn)包裝： | 72 |
| 類型： | 時(shí)鐘和數(shù)據(jù)恢復(fù)（CDR），扇出緩沖器（分配），多路復(fù)用器 |
| PLL： | 是 |
| 主要目的： | SONET/SDH，STS，STM |
| 輸入： | LVDS，LVPECL |
| 輸出： | LVDS，LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:2 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 622.08MHz |
| 電源電壓： | 1.71 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-LQFP |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x14） |
| 包裝： | 托盤 |
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XRT91L34
14
QUAD CHANNEL MULTIRATE STS-12/3/1 AND STM-4/1/0 SONET/SDH CDR
REV. 1.0.1
2.0
RECEIVE SECTION
The receive section of XRT91L34 includes four differential input buffers RXDI[3:0]P/N, followed by clock and
data recovery units (CDR) and recovered serial data and clock differential output drivers. The receiver accepts
the high speed Non-Return to Zero (NRZ) serial data at 622.08/155.52/51.84 Mbps through the input interfaces
RXDI[3:0]P/N. The clock and data recovery unit recovers the high-speed receive clock from the incoming data
stream. The recovered serial data is presented to the RXDO[3:0]P/N differential output driver interface. The
high-speed recovered clock RXCLKO[3:0]P/N, is used to synchronize the transfer of the RXDO[3:0]P/N data
with the receive portion of a framer/mapper device.
The recovered data RXDO[3:0]P/N and clock
RXCLKO[3:0]P/N differential output driver interfaces are designed for ultimate flexibility by supporting either
LVDS or Differential LVPECL protocol level. Upon initialization or loss of signal or loss of lock, the external
reference clock signal of 19.44 MHz or 77.76 MHz is used to start-up the clock recovery phase-locked loop for
proper operation. The included CDR blocks in the XRT91L34 can be individually disabled by asserting the
CDRDIS[3:0] pins to permit the flexibility of powering down unused channels.
2.1
Receive Serial Input
The receive serial inputs are applied to RXDI[3:0]P/N. The XRT91L34 includes internal termination, this has
the advantage of reducing the number of external board components. The XRT91L34 terminates the receive
inputs using 100
line-to-line method of termination. Differential LVPECL operation of receive inputs can be
supported, provided each optical module Differential LVPECL output pin must have a 130
DC current path
resistor to GND whether internally or externally. A simplified LVDS/Differential LVPECL DC coupling block
diagram is shown in Figure 4.
NOTE: Some optical modules integrate AC coupling capacitors and DC current path resistors internally within the module.
AC or DC coupling is largely specific to system design and optical module of choice.
FIGURE 4. RECEIVE SERIAL INPUT INTERFACE USING LVDS/DIFF LVPECL DC COUPLING INTERNAL TERM
Optical Module
RXDI0P
RXDI0N
Optical Fiber
Internal 100 Ohm line-to-line
termination active on
RXDI[3:0]P and RXDI[3:0]N pins
XRT91L34
STS-12/3/1
or
STM-4/1/0
Clock and Data
Recovery
RXDI1P
RXDI1N
RXDI2P
RXDI2N
RXDI3P
RXDI3N
Optical Module
Optical Fiber
Optical Module
Optical Fiber
Optical Module
Optical Fiber
Channel 0
Channel 1
Channel 2
Channel 3
LVDS or DIFF LVPECL Operation
100
Internal 130 Ohm line to GND DC current path resistors
required for Optical Module DIFF LVPECL Operation
VBB1.2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT91L34IVF | 制造商:Exar Corporation 功能描述:CDR 51.84Mbps/155.52Mbps/622.08Mbps SONET/SDH 128-Pin LQFP 制造商:EXAR 功能描述:CDR 51.84Mbps/155.52Mbps/622.08Mbps SONET/SDH 128-Pin LQFP |
| XRT91L34IV-F | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 8-Bit TTL 1.8V temp -45 to 85C;UART RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT91L34IVTR | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4 CH OC-12/STM4 OC-3/STM1 CDR RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT91L34IVTR-F | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4 CH OC-12/STM4 OC-3/STM1 CDR RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT91L80 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
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