参数资料
| 型号： | XRT72L71IQ |
| 厂商： | Exar Corporation |
| 文件页数： | 14/102页 |
| 文件大小： | 0K |
| 描述： | IC FRAMER DS3 ATM UNI 160PQFP |
| 产品变化通告： | XRT72Lx Series Obsolescence 02/May/2012 |
| 标准包装： | 24 |
| 控制器类型： | DS3 ATM UNI，透明通道调帧器 |
| 电源电压： | 3.3V |
| 电流 - 电源： | 120mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 160-BQFP |
| 供应商设备封装： | 160-PQFP（28x28） |
| 包装： | 托盘 |
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XRT72L71
DS3 ATM UNI/CLEAR CHANNEL FRAMER
REV. 1.1.0
15
97
RxPOS
I
Receive Positive Data Input: The exact role of this input pin depends upon
whether the UNI is operating in the Unipolar or Bipolar Mode.
Unipolar Mode: This input pin functions as the “Single-Rail” input for the
“incoming” DS3 data stream. The signal at this input pin will be sampled and
latched (into the Receive DS3 Framer) on the “user-selected” edge of the
RxLineClk signal.
Bipolar Mode: This input functions as one of the dual rail inputs for the
incoming AMI/B3ZS encoded DS3 data that has been received from an exter-
nal Line Interface Unit (LIU) IC. RxNEG functions as the other dual rail input
for the UNI. When this input pin is asserted, it means that the LIU has
received a “positive polarity” pulse from the line.
98
RxNEG
I
Receive Negative Data Input: The exact role of this input pin depends upon
whether the UNI is operating in the Unipolar or Bipolar Mode.
Unipolar Mode: This input pin is inactive, and should be pulled (“Low” or
"High") when the UNI is operating in the Unipolar Mode.
Bipolar Mode: This input pin functions as one of the dual rail inputs for the
incoming AMI/B3ZS encoded DS3 data that has been received from an exter-
nal Line Interface Unit (LIU) IC. RxPOS functions as the other dual rail input
for the UNI. When this input pin is asserted, it means that the LIU has
received a “negative polarity” pulse from the line.
99
RxLineClk
I
Receive LIU (Recovered) Clock Input: This input signal serves three pur-
poses:
1. The Receive DS3 Framer uses it to sample and “latch” the signals at the
RxPOS and RxNEG input pins (into the Receive DS3 Framer circuitry).
2. This input signal functions as the timing reference for the Receive Framer
block.
3. The Transmit DS3 Framer block can be configured to use this input signal as
its timing reference.
NOTE: Note: This signal is the recovered clock from the external DS3 LIU
(Line Interface Unit) IC, which is derived from the incoming DS3 data.
100
RxPRed
O
Receiver Red Alarm Indicator—Receive PLCP Processor: The UNI
asserts this output pin to denote that one of the following events has been
detected by the Receive PLCP Processor:
OOF—Out of Frame Condition
LOF—Loss of Frame Condition
NOTE: This output pin is only active whenever the XRT72L71 has been con-
figured to operate in the “ATM UNI” Mode.
101
RxRed
O
Receiver Red Alarm Indicator—Receive DS3 Framer: The UNI asserts this
output pin to denote that one of the following conditions is currently being
declared by the Receive DS3 Framer block:
LOS—Loss of Signal Condition
OOF—Out of Frame Condition
AIS—Alarm Indication Signal Detection
NOTE: This output pin is effectively, the “Wired-OR” of the “RxLOS”, the
“RxOOF” and the “RxAIS” output pins.
PIN DESCRIPTION (CONTINUED)
PIN NO.
SYMBOL
TYPE
DESCRIPTION
相关PDF资料 |
PDF描述 |
|---|---|
| XRT73L02MIV-F | IC LIU E3/DS3/STS-1 2CH 100TQFP |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT72L71IQ-F | 功能描述:网络控制器与处理器 IC Single CH DS3 UNI (3.3V) 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 |
| XRT72L73IB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XRT72L74IB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XRT7300 | 制造商:EXAR 制造商全称:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT7300ES | 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 |
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