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參數(shù)資料
| 型號： | XRT83SL28IV |
| 廠商： | EXAR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
| 中文描述： | DATACOM, PCM TRANSCEIVER, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, TQFP-144 |
| 文件頁數(shù)： | 29/47頁 |
| 文件大?。?/td> | 377K |
| 代理商： | XRT83SL28IV |
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xr
REV. 1.0.0
XRT83SL28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
27
3.2.3
The receivers on the backup card should be programmed for "High" impedance. Since there is no external
resistor in the circuit, the receivers on the backup card will not load down the line interface. This key design
feature eliminates the need for relays and provides one bill of materials for all interface modes of operation.
Select the impedance for the desired mode of operation, E1 75
or 120
. To swap the primary card, set the
backup card to internal impedance, then the primary card to "High" impedance. See Figure 22. for a simplified
block diagram of the receive section for a 1:1 redundancy scheme.
F
IGURE
22. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
R
ECEIVE
I
NTERFACE
FOR
1:1
AND
1+1 R
EDUNDANCY
Receive Interface with 1:1 and 1+1 Redundancy
3.2.4
N+1 redundancy has one backup card for N primary cards. Due to impedance mismatch and signal
contention, external relays are necessary when using this redundancy scheme. The relays create complete
isolation between the primary cards and the backup card. This allows all transmitters and receivers on the
primary cards to be configured in internal impedance, providing one bill of materials for all interface modes of
operation. The transmit and receive sections of the LIU device are described separately.
N+1 Redundancy Using External Relays
"High" Impedance
Internal Impedance
Backplane Interface
Primary Card
Backup Card
XRT83SL28
Rx
E1 Line
Rx
1:1
1:1
XRT83SL28
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PDF描述 |
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| XRT83SL30 | SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83SL30IV | SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83VSH28 | 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH28IB | 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH314 | 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT83SL28IV-F | 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT83SL30 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83SL30ES | 功能描述:外圍驅(qū)動器與原件 - PCI 1 CHT1/E1 LIUSH RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT83SL30IV | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83SL30IV-F | 功能描述:網(wǎng)絡(luò)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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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