參數(shù)資料
型號: XRT75VL00IV
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
中文描述: DATACOM, PCM TRANSCEIVER, PQFP52
封裝: 10 X 10 MM, TQFP-52
文件頁數(shù): 10/50頁
文件大?。?/td> 268K
代理商: XRT75VL00IV
XRT75VL00
E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.3
8
CLOCK INTERFACE
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
44
ExClk/12M
I
Clock Input (34.368 MHz or 44.736 MHz or 51.84 MHz ± 20 ppm):
Based on the mode selected, provide the appropriate reference clock signal.
If the XRT75VL00 is configured for Single Frequency Mode with the SFM_EN
tied “High”, then provide a 12.288 MHz ± 20 ppm clock and depending on the
mode, the correct frequency is generated internally by the clock synthesizer..
9
SFM_EN
I
Single Frequency Enable:
Tie this pin “High” to select the single frequency mode. When enabled, a single
frequency clock, 12.288 MHz is input through the ExClk input pin and the inter-
nal clock synthesizer generates the appropriate clock frequency.
N
OTE
:
This pin is internally pulled down.
39
CLK_OUT
O
Clock out put:
When the Single Frequency Mode is selected, a low jitter clock will be out put.
The frequency of this clock depends on whether the XRT75VL00 is configured
in E3 or DS3 or STS-1 mode.
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