参数资料
| 型号： | XRT73L02MIV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 21/46页 |
| 文件大小： | 0K |
| 描述： | IC LIU E3/DS3/STS-1 2CH 100TQFP |
| 标准包装： | 90 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 2/2 |
| 规程： | DS3，E3，STS-1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-TQFP（14x14） |
| 包装： | 托盘 |
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XRT73L02M
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TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
26
When the MTIP_n and MRING_n are connected to the TTIP_n and TRING_n lines, the drive monitor circuit
monitors the line for transitions. The DMO_n (Drive Monitor Output) will be asserted “Low” as long as the tran-
sitions on the line are detected via MTIP_n and MRING_n.
If no transitions on the line are detected for 128 ± 32 TxClk_n periods, the DMO_n output toggles “High” and
when the transitions are detected again, DMO_n toggles “Low”.
NOTES:
1. The Drive Monitor Circuit is only for diagnostic purpose and does not have to be used to operate the transmitter.
2. With TxMON pin “High”, MTIP and MRING will be internally connected to TTIP and TRING for self-monitoring.
4.0.5
TRANSMITTER SECTION ON/OFF:
The transmitter section of each channel can either be turned on or off. To turn on the transmitter, set the input
pin TxON to “High” (in Hardware Mode) or in Host Mode set the TxON_n control bits and tie the TxON pins
“High”
When the transmitter is turned off, TTIP_n and TRING_n are tri-stated.
NOTES:
1. This feature provides support for Redundancy.
2. If configured in Host mode, to permit a system designed for redundancy to quickly shut-off the defective line card
and turn on the back-up line card, setting the TxON_n control bits transfers the control to TxON pins.
5.0
THE RECEIVER SECTION:
This section describes the detailed operation of the various blocks in the receiver. The receiver recovers the
TTL/CMOS level data from the incoming bipolar B3ZS or HDB3 encoded input pulses.
5.0.1
AGC/EQUALIZER:
The Adaptive Gain Control circuit amplifies the incoming analog signal and compensates for the various flat
losses and also for the loss at one-half symbol rate. The AGC has a dynamic range of 30 dB.
The Equalizer restores the integrity of the signal and compensates for the frequency dependent attenuation up
to 900 feet of coaxial cable (1300 feet for E3). The Equalizer also boosts the high frequency content of the sig-
nal to reduce Inter-Symbol Interference (ISI) so that the slicer slices the signal at 50% of peak voltage to gen-
erate Positive and Negative data.
The Equalizer can either be “IN” or “OUT” by setting the REQEN_n pin “High” or “Low” (in Hardware Mode) or
setting the REQEN_n control bit to “1” or “0” (in Host Mode).
RECOMMENDATIONS FOR EQUALIZER SETTINGS:
The Equalizer has two gain settings to provide optimum equalization. In the case of normally shaped DS3/
STS-1 pulses (pulses that meet the template requirements) that has been driven through 0 to 900 feet of cable,
the Equalizer can be left “IN” by setting the REQEN_n pin to “High” (in Hardware Mode) or setting the
REQEN_n control bit to “1” (in Host Mode).
However, for square-shaped pulses such as E3 or for DS3/STS-1 high pulses (that does not meet the pulse
template requirements), it is recommended that the Equalizer be left “OUT” for cable length less than 300 feet
by setting the REQEN_n pin “Low” (in Hardware Mode) or by setting the REQEN_n control bit to “0” (in Host
Mode).This would help to prevent over-equalization of the signal and thus optimize the performance in terms of
better jitter transfer characteristics.
NOTE: The results of extensive testing indicates that even when the Equalizer was left “IN” (REQEN_n = “HIGH”),
regardless of the cable length, the integrity of the E3 signal was restored properly over 0 to 12 dB cable loss at
Industrial Temperature.
相关PDF资料 |
PDF描述 |
|---|---|
| XRT73L03BIV-F | IC LIU E3/DS3/STS-1 3CH 120LQFP |
| XRT73L04BIV-F | IC LIU E3/DS3/STS-1 4CH 144LQFP |
| XRT73L06IB-F | IC LIU E3/DS3/STS-1 6CH 217BGA |
| XRT73LC00AIV-F | IC LIU STS1/DS3/E3 SGL 44TQFP |
| XRT73LC03AIV-F | IC LIU E3/DS3/STS-1 3CH 120LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT73L02MIVTR-F | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| XRT73L03 | 制造商:EXAR 制造商全称:EXAR 功能描述:3 CHANNEL E3/DS3/STS-1 LINE INTERFCE UNIT |
| XRT73L03A | 制造商:EXAR 制造商全称:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03AIV | 制造商:Exar Corporation 功能描述: |
| XRT73L03B | 制造商:EXAR 制造商全称:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
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