參數(shù)資料
型號(hào)： 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)： 28/47頁
文件大?。?/td> 377K
代理商： XRT83SL28IV
XRT83SL28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
xr
REV. 1.0.0
26
3.2
Telecommunication system design requires signal integrity and reliability. When an E1 primary line card has a
failure, it must be swapped with a backup line card while maintaining connectivity to a backplane without losing
data. System designers can achieve this by implementing common redundancy schemes with the
XRT83SL28 LIU. EXAR offers features that are tailored to redundancy applications while reducing the number
of components and providing system designers with solid reference designs.
RLOS and DMO
If an RLOS or DMO condition occurs, the XRT83SL28 reports the alarm to the individual status registers on a
per channel basis. However, for redundancy applications, RLOS and DMO pins can be used to initiate an
automatic switch to the back up card.
Typical Redundancy Schemes
1:1 One backup card for every primary card (Facility Protection)
1+1 One backup card for every primary card (Line Protection)
·N+1 One backup card for N primary cards
Line Card Redundancy
3.2.1
The 1:1 facility protection and 1+1 line protection have one backup card for every primary card. When using
1:1 or 1+1 redundancy, the backup card has its transmitters tri-stated and its receivers in high impedance. This
eliminates the need for external relays and provides one bill of materials for all interface modes of operation.
For 1+1 line protection, the receiver inputs on the backup card have the ability to monitor the line for bit errors
while in high impedance. The transmit and receive sections of the LIU device are described separately.
3.2.2
Transmit Interface with 1:1 and 1+1 Redundancy
The transmitters on the backup card should be tri-stated. Select the appropriate impedance for the desired
mode of operation, E1 75
or 120
. A 0.68uF capacitor is used in series with TTIP for blocking DC bias. See
Figure 21. for a simplified block diagram of the transmit section for a 1:1 and 1+1 redundancy.
F
IGURE
21. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
T
RANSMIT
I
NTERFACE
FOR
1:1
AND
1+1 R
EDUNDANCY
1:1 and 1+1 Redundancy Without Relays
E1 Line
Backplane Interface
Primary Card
Backup Card
XRT83SL28
Tx
Tx
0.68uF
0.68uF
Internal Impedance
1:2
1:2
XRT83SL28
Internal Impedance
相關(guān)PDF資料
PDF描述
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
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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(dòng)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(dòng)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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