參數(shù)資料
型號(hào)： XRT83L34IV
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
中文描述： DATACOM, PCM TRANSCEIVER, PQFP128
封裝： 14 X 20 MM, 1.40 MM HEIGHT, TQFP-128
文件頁(yè)數(shù)： 38/82頁(yè)
文件大?。?/td> 447K
代理商： XRT83L34IV
XRT83L34
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
REV. P1.3.4
35
N+1 REDUNDANCY
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 advantage of relays is that they 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 mode, providing one bill of materials for all
interface modes of operation. The transmit and receive sections of the XRT83L34 are described separately.
TRANSMIT
For N+1 redundancy, the transmitters on all cards should be programmed for internal impedance mode
providing one bill of materials for T1/E1/J1. 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
0.68
μ
F capacitor is used in series with TTIP for blocking DC bias. See
Figure 18
for a simplified block diagram
of the transmit section for an N+1 redundancy scheme.
N
OTE
:
For simplification, the over voltage protection circuitry was omitted.
F
IGURE
18. S
IMPLIFIED
B
LOCK
D
IAGRAM
- T
RANSMIT
S
ECTION
FOR
N+1 R
EDUNDANCY
Backplane Interface
Primary Card
XRT83L4
Tx
Line Interface Card
0.68
μ
F
T1/E1 Line
Primary Card
XRT83L34
Tx
Primary Card
XRT83L34
Tx
Backup Card
XRT83L34
Tx
T1/E1 Line
T1/E1 Line
TxTSEL=1, Internal
TxTSEL=1, Internal
TxTSEL=1, Internal
TxTSEL=1, Internal
1:2 or 1:2.45
0.68
μ
F
0.68
μ
F
0.68
μ
F
1:2 or 1:2.45
1:2 or 1:2.45
相關(guān)PDF資料
PDF描述
XRT83SH314 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SH314_0610 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SH314IB 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SH38 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SH38_0609 8-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
XRT83L34IV-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
XRT83L34IVTR 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
XRT83L34IVTR-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
XRT83L38 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
XRT83L38_07 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
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