參數(shù)資料
型號(hào)： XRT75VL00D
廠商： Exar Corporation
英文描述： E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
中文描述： E3/DS3/STS-1線(xiàn)路接口單元與SONET DESYNCHRONIZER
文件頁(yè)數(shù)： 22/92頁(yè)
文件大小： 836K
代理商： XRT75VL00D
XRT75VL00D
REV. 1.0.3
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
24
4.0
THE TRANSMITTER SECTION:
The Transmitter Section accepts TTL/CMOS level signals from the Terminal Equipment in the selectable data
formats.
In Single-Rail or un-encoded Non-Return-to-Zero (NRZ) input data via TPData pin while the TNData pin
must be grounded. The NRZ or Single-Rail mode is selected when the SR/DR input pin is “High” (in
Hardware Mode) or bit 0 of the control register is “1” (in Host Mode). Figure 12 illustrates the Single-Rail or
NRZ format.
In Dual-Rail mode, data is input via TPData and TNData pins. TPData contains positive data and TNData
contains negative data. The SR/DR input pin = “Low” (in Hardware Mode) or bit 0 of the control register = “0”
(in Host Mode) enables the Dual-Rail mode. Figure 13 illustrates the Dual-Rail data format.
Convert the CMOS level B3ZS or HDB3 encoded data into pulses with shapes that are compliant with the
various industry standard pulse template requirements. Figure 7, Figure 8 and Figure 9 illustrate the pulse
template requirements.
Encode the un-encoded NRZ data into either B3ZS format (for DS3 or STS-1) or HDB3 format (for E3) and
convert to pulses with shapes and width that are compliant with industry standard pulse template
requirements. Figure 7,Figure 8 and Figure 9 illustrate the pulse template requirements.
4.1
TRANSMIT CLOCK:
The Transmit Clock applied via TxClk pin, for the selected data rate (for E3 = 34.368 MHz, DS3 = 44.736 MHz
or STS-1 = 51.84 MHz), is duty cycle corrected by the internal PLL circuit to provide a 50% duty cycle clock to
the pulse shaping circuit. This allows a 30% to 70% duty cycle Transmit Clock be supplied and thus eliminates
the need to use an expensive oscillator.
4.2
B3ZS/HDB3 ENCODER:
When the Single-Rail (NRZ) data format is selected, the Encoder Block encodes the data into either B3ZS
format (for either DS3 or STS-1) or HDB3 format (for E3).
4.2.1
B3ZS Encoding:
FIGURE 12. SINGLE-RAIL OR NRZ DATA FORMAT (ENCODER AND DECODER ARE ENABLED)
FIGURE 13. DUAL-RAIL DATA FORMAT (ENCODER AND DECODER ARE DISABLED)
TxClk
TPData
Data
1
0
TxClk
TPData
TNData
Data
1
0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75VL00D_08 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET
XRT75VL00D1V-F 制造商:Exar Corporation 功能描述:
XRT75VL00DES 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 1CHT3/E3/STS1LIU+ DESYNC 3.3V DRV VER 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
XRT75VL00DIV 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 3.3V 1 CH E3/DS3/STS W/SONET DE-SYNCH 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
XRT75VL00DIV-F 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 3.3V 1 CH E3/DS3/STS W/SONET DE-SYNCH 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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