参数资料
| 型号： | XRT75L00DIVTR-F |
| 厂商： | Exar Corporation |
| 文件页数： | 27/92页 |
| 文件大小： | 0K |
| 描述： | IC LIU E3/DS3/STS-1 SGL 52TQFP |
| 标准包装： | 1,000 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 1/1 |
| 规程： | DS3，E3，STS-1，SONET |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 52-LQFP |
| 供应商设备封装： | 52-TQFP（10x10） |
| 包装： | 带卷 (TR) |
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XRT75L00D
REV. 1.0.2
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
28
The Equalizer can either be “IN” or “OUT” by setting the REQEN pin “High” or “Low” (in Hardware Mode) or
setting the REQEN 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 pin to “High” (in Hardware Mode) or setting the REQEN
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 pin “Low” (in Hardware Mode) or by setting the REQEN 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 = “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.
The Equalizer also contain an additional 20 dB gain stage to provide the line monitoring capability of the
resistively attenuated signals which may have 20dB flat loss. This capability can be turned on by writing a “1” to
the RxMON bits in the control register or by setting the RxMON pin (pin 27) “High”.
5.1.1
Interference Tolerance:
For E3 mode, ITU-T G.703 Recommendation specifies that the receiver be able to recover error-free clock and
data in the presence of a sinusoidal interfering tone signal. For DS3 and STS-1 modes, the same
recommendation is being used. Figure 17 shows the configuration to test the interference margin for DS3/
STS1. Figure 18 shows the set up for E3.
FIGURE 17. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1
SINE WAVE
GENERATOR
PATTERN
GENERATOR
223 - 1 PRBS
Μ
ATTENUATOR
DS3 = 22.368 MHz
STS-1 = 25.92 MHz
S
N
Cable Simulator
DUT
XRT75L00D
Test Equipment
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT75L00ES | 功能描述:时钟合成器/抖动清除器 1CH T3/E3/STS1 LIU+JA 3.3V RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| XRT75L00IV | 功能描述:外围驱动器与原件 - PCI 3.3V 1 CH E3/DS3/STS W/JITTER ATTEN RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT75L00IV-F | 功能描述:外围驱动器与原件 - PCI Sngl Chip LIU DS3/E3 RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT75L00IVTR | 功能描述:时钟合成器/抖动清除器 3.3V 1 CH E3/DS3/STS W/JITTER ATTEN RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| XRT75L00IVTR-F | 功能描述:时钟合成器/抖动清除器 3.3V 1 CH E3/DS3/STS W/JITTER ATTEN RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
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