参数资料
| 型号： | XRT75L02DIV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 39/50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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XRT75L02
REV. 1.0.3
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
42
8.0
DIAGNOSTIC FEATURES:
8.1
PRBS Generator and Detector:
The XRT75L02 contains an on-chip Pseudo Random Binary Sequence (PRBS) generator and detector for
diagnostic purpose. This feature is only available in Host mode. With the PRBSEN_n bit = “1”, the transmitter
will send out PRBS of 223-1 in E3 rate or 215-1 in STS-1/DS3 rate. At the same time, the receiver PRBS
detector is also enabled. When the correct PRBS pattern is detected by the receiver, the RNEG/LCV pin will go
“Low” to indicate PRBS synchronization has been achieved. When the PRBS detector is not in sync the
PRBSLS bit will be set to “1” and RNEG/LCV pin will go “High”.
With the PRBS mode enabled, the user can also insert a single bit error by toggling “INSPRBS” bit. This is
done by writing a “1” to INSPRBS bit. The receiver at RNEG/LCV pin will pulse “High” for one RxClk cycle for
every bit error detected. Any subsequent single bit error insertion must be done by first writing a “0” to
INSPRBS bit and followed by a “1”.
Figure 25 shows the status of RNEG/LCV pin when the XRT75L02 is configured in PRBS mode.
NOTE: In PRBS mode, the device is forced to operate in Single-Rail Mode.
8.2
LOOPBACKS:
The XRT75L02 offers three loop back modes for diagnostic purposes. In Hardware mode, the loop back
modes are selected via the RLB_n and LLB_n pins. In Host mode, the RLB_n and LLB_n bits n the Channel
control registers select the loop back modes.
8.2.1
ANALOG LOOPBACK:
In this mode, the transmitter outputs (TTIP_n and TRING_n) are connected internally to the receiver inputs
(RTIP_n and RRING_n) as shown in Figure 26. Data and clock are output at RCLK_n, RPOS_n and RNEG_n
pins for the corresponding transceiver. Analog loop back exercises most of the functional blocks of the device
including the jitter attenuator which can be selected in either the transmit or receive path.
XRT75L02 can be configured in Analog Loopback either in Hardware mode via the LLB_n and RLB_n pins or
in Host mode via LLB_n and RLB_n bits in the channel control registers.
NOTES:
1.
In the Analog loopback mode, data is also output via TTIP_n and TRING_n pins.
2.
Signals on the RTIP_n and RRING_n pins are ignored during analog loop back.
FIGURE 25. PRBS MODE
RClk
RNEG/LCV
SYNC LOSS
PRBS SYNC
Single Bit Error
相关PDF资料 |
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| XRT75L04DIV-F | IC LIU E3/DS3/STS-1 4CH 176TQFP |
| XRT75L04IV-F | IC LIU E3/DS3/STS-1 4CH 176LQFP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT75L02DIVTR-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 |
| XRT75L02ES | 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 |
| XRT75L02IV | 制造商:EXAR 制造商全称:EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER |
| XRT75L02IV-F | 功能描述:网络控制器与处理器 IC 2-Ch DS3, E3, STS-1 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 |
| XRT75L02IVTR-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 |
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