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參數(shù)資料
| 型號： | XRT72L71IQ |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 14/102頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FRAMER DS3 ATM UNI 160PQFP |
| 產(chǎn)品變化通告： | XRT72Lx Series Obsolescence 02/May/2012 |
| 標準包裝： | 24 |
| 控制器類型： | DS3 ATM UNI，透明通道調幀器 |
| 電源電壓： | 3.3V |
| 電流 - 電源： | 120mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 160-BQFP |
| 供應商設備封裝： | 160-PQFP（28x28） |
| 包裝： | 托盤 |
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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 “l(fā)atch” 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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT72L71IQ-F | 功能描述:網(wǎng)絡控制器與處理器 IC Single CH DS3 UNI (3.3V) RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT72L73IB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| XRT72L74IB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| XRT7300 | 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT7300ES | 功能描述:網(wǎng)絡控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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