参数资料
| 型号： | XRT91L31IQ-F |
| 厂商： | Exar Corporation |
| 文件页数： | 6/41页 |
| 文件大小： | 0K |
| 描述： | IC TXRX SONET/SDH 8BIT 64QFP |
| 标准包装： | 1 |
| 类型： | 收发器，多路复用器 |
| PLL： | 是 |
| 主要目的： | 以太网，SONET/SDH |
| 输入： | LVCMOS，LVPECL，LVTTL |
| 输出： | LVCMOS，LVPECL，LVTTL |
| 电路数： | 1 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 622.08MHz |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-FQFP |
| 供应商设备封装： | 64-PQFP（10x10） |
| 包装： | 托盘 |
| 其它名称： | 1016-1361 |
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XRT91L31
14
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
REV. 1.0.2
1.0
FUNCTIONAL DESCRIPTION
The XRT91L31 transceiver is designed to operate with a SONET Framer/ASIC device and provide a high-
speed serial interface to optical networks. The transceiver converts 8-bit parallel data running at 77.76 Mbps
(STS-12/STM-4) or 19.44 Mbps (STS-3/STM-1) to a serial Differential LVPECL bit stream at 622.08 Mbps or
155.52 Mbps and vice-versa. It implements a clock multiplier unit (CMU), SONET/SDH serialization/de-
serialization (SerDes), receive clock and data recovery (CDR) unit and a SONET/SDH frame and byte
boundary detection circuit. The transceiver is divided into Transmit and Receive sections and is used to
provide the front end component of SONET equipment, which includes primarily serial transmit and receive
functions.
1.1
STS-12/STM-4 and STS-3/STM-1 Mode of Operation
Functionality of the transceiver can be configured by using the appropriate signal level on the STS-12/STS-3
pin. STS-3/STM-1 mode is selected by pulling STS-12/STS-3 "Low" as described in the Hardware Pin
Descriptions. However, if STS-12/STM-4 mode is desired, it is selected by pulling STS-12/STS-3 "High."
Therefore, the following sections describe the functionality rather than how each function is controlled. Hence,
the Hardware Pin and Register Bit Descriptions focus on device configuration.
1.2
Clock Input Reference for Clock Multiplier (Synthesizer) Unit
The XRT91L31 can accept both a 19.44 MHz or a 77.76 MHz Differential LVPECL clock input at REFCLKP/N
or a Single-Ended LVTTL clock at TTLREFCLK as its internal timing reference for generating higher speed
clocks. The REFCLKP/N or TTLREFCLK input should be generated from an LVPECL/LVTTL crystal oscillator
which has a frequency accuracy better than 20ppm in order for the transmitted data rate frequency to have the
necessary accuracy required for SONET systems. The reference clock can be provided with one of two
frequencies chosen by CMUFREQSEL. The reference frequency options for the XRT91L31 are listed in
Table 1.
1.3
Data Latency
Due to different operating modes and data logic paths through the device, there is an associated latency from
data ingress to data egress. Table 4 specifies the data latency for a typical path.
TABLE 4: DATA INGRESS TO DATA EGRESS LATENCY
TABLE 3: CMU REFERENCE FREQUENCY OPTIONS (DIFFERENTIAL OR SINGLE-ENDED)
CMUFREQSEL
STS12/STS3
REFCLKP/N OR TTLREFCLK
REFERENCE FREQUENCY
DATA RATE
0
77.76 MHz
STS-3/STM-1
155.52 Mbps
0
1
77.76 MHz
STS-12/STM-4
622.08 Mbps
1
0
19.44 MHz
STS-3/STM-1
155.52 Mbps
1
19.44 MHz
STS-12/STM-4
622.08 Mbps
Mode Of
Operation
Data Path
Clock Reference
Range Of Clock
Cycles
Thru-mode
MSB at RXIP/N to data on RXDO[7:0]
Recoved RXIP/N Clock
25 to 35
Serial Remote Loopback
MSB at RXIP/N to MSB at TXOP/N
Recoved RXIP/N Clock
2 to 4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT91L31IQ-F | 制造商:Exar Corporation 功能描述:SONET Transceiver IC |
| XRT91L31IQTR | 功能描述:总线收发器 SONET/SDH, FULL DPLX 3.3V I/O, LOS, CMU RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| XRT91L31IQTR-F | 功能描述:总线收发器 SONET/SDH, FULL DPLX 3.3V I/O, LOS, CMU RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| XRT91L32 | 制造商:EXAR 制造商全称:EXAR 功能描述:STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER |
| XRT91L32ES | 功能描述:LIN 收发器 SONET SDH 8 bit TRANCEIVER RoHS:否 制造商:NXP Semiconductors 工作电源电压: 电源电流: 最大工作温度: 封装 / 箱体:SO-8 |
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