參數(shù)資料
型號： XRT83L30IV-F
廠商： Exar Corporation
文件頁數(shù)： 28/78頁
文件大?。?/td> 0K
描述： IC LIU LH/SH T1/E1 SGL 64TQFP
標準包裝： 160
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 1/1
規(guī)程： T1，E1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 64-LQFP
供應商設備封裝： 64-TQFP（10x10）
包裝： 托盤
其它名稱： 1016-1633
XRT83L30IV-F-ND
XRT83L30
31
SINGLE-CHANNEL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.1
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.
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 16 for a simplified block diagram of the transmit section for 1:1 and 1+1
redundancy scheme.
NOTE: For simplification, the over voltage protection circuitry was omitted.
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相關代理商/技術參數(shù)
參數(shù)描述
XRT83L314 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
XRT83L314ES 功能描述:LIN 收發(fā)器 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
XRT83L314IB 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT83L314IB-F 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
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