參數(shù)資料
型號： XRT83VSH38IB
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述： DATACOM, PCM TRANSCEIVER, PBGA225
封裝： 19 X 19 MM, 1 MM PITCH, PLASTIC, BGA-225
文件頁數(shù)： 39/76頁
文件大?。?/td> 722K
代理商： XRT83VSH38IB
XRT83VSH38
36
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
5.2.4
N+1 Redundancy Using External Relays
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.
5.2.5
Transmit Interface with N+1 Redundancy
For N+1 redundancy, the transmitters on all cards should be programmed for internal impedance. The
transmitters on the backup card do not have to be tri-stated. To swap the primary card, close the desired
relays, and tri-state the transmitters on the failed primary card. A 0.68uF capacitor is used in series with TTIP
for blocking DC bias. See
Figure 28
for a simplified block diagram of the transmit section for an N+1
redundancy scheme.
F
IGURE
28. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
T
RANSMIT
I
NTERFACE
FOR
N+1 R
EDUNDANCY
Backplane Interface
Primary Card
XRT83VSH38
Tx
Line Interface Card
0.68uF
T1/E1 Line
0.68uF
Primary Card
Tx
0.68uF
Primary Card
Tx
0.68uF
Backup Card
Tx
T1/E1 Line
T1/E1 Line
Internal
Impedence
1:2
1:2
1:2
XRT83VSH38
XRT83VSH38
XRT83VSH38
Internal
Impedence
Internal
Impedence
Internal
Impedence
相關(guān)PDF資料
PDF描述
XRT84L14 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT84L18 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT84L38 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT84L38_06 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT84L38IB Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT83VSH38IB-F 功能描述:外圍驅(qū)動器與原件 - PCI 8 Channel Short-Haul RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT83VSH38IB-F 制造商:Exar Corporation 功能描述:T1/E1 LIU IC
XRT84L38 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER
XRT84L38_06 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 FRAMER
XRT84L38IB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 8 Ch T1/E1 Framer 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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