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參數(shù)資料
| 型號： | XRT73L02MIVTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 19/46頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU E3/DS3/STS-1 2CH 100TQFP |
| 標準包裝： | 1,000 |
| 類型： | 線路接口裝置（LIU） |
| 驅動器/接收器數(shù)： | 2/2 |
| 規(guī)程： | DS3，E3，STS-1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-LQFP |
| 供應商設備封裝： | 100-TQFP（14x14） |
| 包裝： | 帶卷 (TR) |
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XRT73L02M
xr
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
24
4.0.1
TRANSMIT CLOCK:
The Transmit Clock applied via TxClk_n pins, for the selected data rate (for E3 = 34.368 MHz, DS3 = 44.736
MHz or STS-1 = 51.84 MHz), is duty cycle corrected by the internal PLL circuit to provide a 50% duty cycle
clock to the pulse shaping circuit. This allows a 30% to 70% duty cycle Transmit Clock to be supplied.
4.0.2
B3ZS/HDB3 ENCODER:
When the Single-Rail (NRZ) data format is selected, the Encoder Block encodes the data into either B3ZS for-
mat (for either DS3 or STS-1) or HDB3 format (for E3).
4.0.2.1
B3ZS Encoding:
An example of B3ZS encoding is shown in Figure 14. If the encoder detects an occurrence of three consecu-
tive zeros in the data stream, it is replaced with either B0V or 00V, where ‘B’ refers to Bipolar pulse that is com-
pliant with the Alternating polarity requirement of the AMI (Alternate Mark Inversion) line code and ‘V’ refers to
a Bipolar Violation (e.g., a bipolar pulse that violates the AMI line code). The substitution of B0V or 00V is
made so that an odd number of bipolar pulses exist between any two consecutive violation (V) pulses. This
avoids the introduction of a DC component into the line signal.
4.0.2.2
HDB3 Encoding:
An example of the HDB3 encoding is shown in Figure 15. If the HDB3 encoder detects an occurrence of four
consecutive zeros in the data stream, then the four zeros are substituted with either 000V or B00V pattern. The
substitution code is made in such a way that an odd number of bipolar (B) pulses exist between any consecu-
tive V pulses. This avoids the introduction of DC component into the analog signal.
NOTES:
1. When Dual-Rail data format is selected, the B3ZS/HDB3 Encoder is automatically disabled.
2. In Dual-Rail format, the Bipolar Violations in the incoming data stream is converted to valid data pulses.
3. Encoder and Decoder is enabled only in Single-Rail mode.
FIGURE 14. B3ZS ENCODING FORMAT
FIGURE 15. HDB3 ENCODING FORMAT
00
0
1
V
B
V
1
0
00
0
00
0
V
BV
0
00
TClk
Line
Signal
TPDATA
0
00
0
1
V
B
V
1
0
00
0
00
V
B
0
00
TClk
Line
Signal
TPDATA
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73L03 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL E3/DS3/STS-1 LINE INTERFCE UNIT |
| XRT73L03A | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03AIV | 制造商:Exar Corporation 功能描述: |
| XRT73L03B | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L03BES | 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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