參數(shù)資料
型號： XRT83SL30IV
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
中文描述： DATACOM, PCM TRANSCEIVER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, TQFP-64
文件頁數(shù)： 33/76頁
文件大?。?/td> 376K
代理商： XRT83SL30IV
á
XRT83SL30
SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
PROGRAMMING CONSIDERATIONS
In many applications switching the control of the transmitter outputs and the receiver line impedance to
hardware
control will provide faster transmitter ON/OFF switching.
In
Host
Mode, there are two bits in register 18 (12H) that control the transmitter outputs and the Rx line
impedance select, TXONCNTL (Bit 5) and TERCNTL (Bit 4).
Setting bit-5 (TXONCNTL) to a “1” transfers the control of the Transmit On/Off function to the TXON
Hardware
control pin (pin 58).
Setting bit-4 (TERCNTL) to a “1” transfers the control of the Rx line impedance select (RXTSEL) to the
RXTSEL
Hardware
control pin (pin 44).
Either mode works well with redundancy applications. The user can determine which mode has the fastest
switching time for a unique application.
REV. P1.0.4
30
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+1One backup card for N primary cards
1:1 REDUNDANCY
A 1:1 facility protection redundancy scheme has one backup card for every primary card. When using 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. The transmit
and receive sections of the LIU device are described separately.
1+1 REDUNDANCY
A 1+1 line protection redundancy scheme has one backup card for every primary card, and the receivers on
the backup card are monitoring the receiver inputs. Therefore, the receivers on both cards need to be active.
The transmit outputs require no external resistors. The transmit and receive sections of the LIU device are
described separately.
TRANSMIT 1:1 & 1+1 REDUNDANCY
For 1:1 and 1+1 redundancy, the transmitters on the primary and backup card should be programmed for
Internal Impedance mode. The transmitters on the backup card should be tri-stated. Select the appropriate
impedance for the desired mode of operation, T1/E1/J1. A 0.68uF capacitor is used in series with TTIP for
blocking DC bias. See
Figure 14
for a simplified block diagram of the transmit section for 1:1 and 1+1
redundancy scheme.
N
OTE
:
For simplification, the over voltage protection circuitry was omitted.
相關(guān)PDF資料
PDF描述
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
XRT83VSH314IB 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316 16-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
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
XRT83SL30IVTR-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
XRT83SL314 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SL314_05 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SL314ES 功能描述:LIN 收發(fā)器 14 CHT1/E1 LIUSH RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8
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