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XRT79L71 датащи(PDF) 73 Page - Exar Corporation

номер детали XRT79L71
подробное описание детали  1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
PDF  441 Pages
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производитель  EXAR [Exar Corporation]
домашняя страница  http://www.exar.com
Logo EXAR - Exar Corporation

XRT79L71 датащи(HTML) 73 Page - Exar Corporation

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PRELIMINARY
XRT79L71
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
REV. P1.0.3
61
RECEIVE UTOPIA INTERFACE
RECEIVE UTOPIA INTERFACE
The purpose of the Receive UTOPIA Interface block is to function as either a Standard UTOPIA Level 1, 2 or 3
Interface as it outputs ATM cell data to either an ATM Layer or ATM Adaptation Layer Processor.
FIGURE 23. TIMING DIAGRAM FOR THE RECEIVE UTOPIA INTERFACE BLOCK
TABLE 14: TIMING INFORMATION FOR THE RECEIVE UTOPIA INTERFACE BLOCK
Symbol
PARAMETER
MIN.TYP
MAX.UNITS
Receive UTOPIA Interface Block (See Figure 22)
t53
Delay time from rising edge of RxUClk to Data Valid at RxU-
Data[15:0]
2.7
12
ns
t54
Rx UTOPIA Read Enable setup time to rising edge of RxUClk
4
ns
t55
Delay time from rising edge of RxUClk to valid RxUPrty bit
2.9
9.8
ns
t56
Delay time from rising edge of RxUClk to valid RxUSoC bit
3.5
9.7
ns
t57
Delay time from Read Enable false to Data Bus being tri-stated
1
11.5
16
ns
t58
Delay time from Read Enable false to RxUPrty bit being tri-
stated
112
16
ns
RxUData[15:0]
RxUEn*
RxUPrty
RxUSoC
RxUClk
t54
t57
RxUClav
t62
t63
t53
DATA VALID
t55
t58
t59
t56



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