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參數(shù)資料
| 型號： | XRT83SL314IB-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 35/83頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU SH T1/E1/J1 14CH 304TBGA |
| 標準包裝： | 27 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 14/14 |
| 規(guī)程： | T1，E1，J1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 304-LBGA |
| 供應(yīng)商設(shè)備封裝： | 304-TBGA（31x31） |
| 包裝： | 托盤 |
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XRT83SL314
xr
REV. 1.0.1
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
37
4.3
Transmit Jitter Attenuator
The XRT83SL314 LIU is ideal for multiplexer or mapper applications where the network data crosses multiple
timing domains. As the higher data rates are de-multiplexed down to T1 or E1 data, stuffing bits are typically
removed which can leave gaps in the incoming data stream.
The transmit path has a dedicated jitter
attenuator with a 32-Bit or 64-Bit FIFO that is used to smooth the gapped clock into a steady T1 or E1 output.
The maximum gap width of the 14-Channel LIU is shown in Table 11.
NOTE: If the LIU is used in a loop timing system, the receive path has a dedicated jitter attenuator. See the Receive
Section of this datasheet.
4.4
TAOS (Transmit All Ones)
The XRT83SL314 has the ability to transmit all ones on a per channel basis by programming the appropriate
channel register. This function takes priority over the digital data present on the TPOS/TNEG inputs. For
example: If a fixed "0011" pattern is present on TPOS in single rail mode and TAOS is enabled, the transmitter
will output all ones. In addition, if digital or dual loopback is selected, the data on the RPOS output will be
equal to the data on the TPOS input. Figure 32 is a diagram showing the all ones signal at TTIP and TRING.
FIGURE 32. TAOS (TRANSMIT ALL ONES)
4.5
Transmit Diagnostic Features
In addition to TAOS, the XRT83SL314 offers multiple diagnostic features for analyzing network integrity such
as ATAOS, Network Loop Code generation, and QRSS on a per channel basis by programming the
appropriate registers. These diagnostic features take priority over the digital data present on TPOS/TNEG
inputs. The transmitters will send the diagnostic code to the line and will be maintained in the digital loopback
if selected. When the LIU is responsible for sending diagnostic patterns, the LIU is automatically placed in the
single rail mode.
TABLE 11: MAXIMUM GAP WIDTH FOR MULTIPLEXER/MAPPER APPLICATIONS
FIFO DEPTH
MAXIMUM GAP WIDTH
32-Bit
20 UI
64-Bit
50 UI
TAOS
11
1
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| XRT83SL34 | 制造商:EXAR 制造商全稱:EXAR 功能描述:QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
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| XRT83SL38 | 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
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