参数资料
| 型号： | XRT83L30IV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 15/78页 |
| 文件大小： | 0K |
| 描述： | IC LIU LH/SH T1/E1 SGL 64TQFP |
| 标准包装： | 160 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 1/1 |
| 规程： | T1，E1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-TQFP（10x10） |
| 包装： | 托盘 |
| 其它名称： | 1016-1633 XRT83L30IV-F-ND |
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XRT83L30
19
SINGLE-CHANNEL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.1
RECEIVE MONITOR MODE
In applications where Monitor mode is desired, the equalizer can be configured in a gain mode which handles
input signals attenuated resistively up to 29dB, along with 0 to 6dB cable attenuation for both T1 and E1
applications, refer to Table 5 for details. This feature is available in both Hardware and Host modes.
RECEIVER LOSS OF SIGNAL (RLOS)
For compatibility with ITU G.775 requirements, the RLOS monitoring function is implemented using both
analog and digital detection schemes. If the analog RLOS condition occurs, a digital detector is activated to
count for 32 consecutive zeros in E1 (4096 bits in Extended Los mode, EXLOS = “1”) or 175 consecutive zeros
in T1 before RLOS is asserted. RLOS is cleared when the input signal rises +3dB (built in hysteresis) above
the point at which it was declared and meets 12.5% ones density of 4 ones in a 32 bit window, with no more
than 16 consecutive zeros for E1. In T1 mode, RLOS is cleared when the input signal rises +3dB (built in
hysteresis) above the point at which it was declared and contains 16 ones in a 128 bit window with no more
than 100 consecutive zeros in the data stream. When loss of signal occurs, RLOS register indication and
register status will change. If the RLOS register enable is set high (enabled), the alarm will trigger an interrupt
causing the interrupt pin (INT) to go low. Once the alarm status register has been read, it will automatically
reset upon read (RUR), and the INT pin will return high.
Analog RLOS
Setting the Receiver Input to -15dB T1/E1 Short Haul Mode
By setting the receiver input to -15dB T1/E1 short haul mode, the equalizer will detect the incoming amplitude
and make adjustments by adding gain up to a maximum of +15dB normalizing the T1/E1 input signal.
NOTE: This setting refers to cable loss (frequency), not flat loss (resistive).
Once the T1/E1 input signal has been normalized to 0dB by adding the maximum gain (+15dB), the receiver
will declare RLOS if the signal is attenuated by an additional -9dB. The total cable loss at RLOS declaration is
typically -24dB (-15dB + -9dB). A 3dB hysteresis was designed so that transients will not trigger the RLOS to
clear. Therefore, the RLOS will typically clear at a total cable attenuation of -21dB. See Figure 6 for a
simplified diagram.
Setting the Receiver Input to -29dB T1/E1 Gain Mode
By setting the receiver input to -29dB T1/E1 gain mode, the equalizer will detect the incoming amplitude and
make adjustments by adding gain up to a maximum of +29dB normalizing the T1/E1 input signal.
NOTE: This is the only setting that refers to flat loss (resistive). All other modes refer to cable loss (frequency).
FIGURE 6. SIMPLIFIED DIAGRAM OF -15dB T1/E1 SHORT HAUL MODE AND RLOS CONDITION
Norm alized up to +15dB Max
Declare LOS
Clear LOS
-9dB
+3dB
Clear LOS
Declare LOS
+3dB
-9dB
相关PDF资料 |
PDF描述 |
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| XRT83L38IB-F | IC LIU T1/E1/J1 OCTAL 225BGA |
| XRT83SH314IB-F | IC LIU T1/E1/J1 14CH 304TBGA |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT83L314 | 制造商:EXAR 制造商全称:EXAR 功能描述:14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT |
| XRT83L314ES | 功能描述:LIN 收发器 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 |
| XRT83L314IB | 功能描述:时钟合成器/抖动清除器 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 |
| XRT83L314IB-F | 功能描述:时钟合成器/抖动清除器 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 |
| XRT83L314IB-L | 功能描述:LIN 收发器 14 channel, LH/SH T1/E1 LIU 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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