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XRT7250 Datasheet(PDF) 411 Page - Exar Corporation

Part # XRT7250
Description  DS3/E3 FRAMER IC
PDF  463 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT7250 Datasheet(HTML) 411 Page - Exar Corporation

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XRT7250
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DS3/E3 FRAMER IC
REV. 1.1.1
392
FIGURE 194. THE STATE MACHINE DIAGRAM FOR THE RECEIVE E3 FRAMER E3 FRAME ACQUISITION/MAINTENANCE
ALGORITHM
FA1, FA2
Octet
Search
FA1, FA2
Octet
Verification
In Frame
OOF
Condition
LOF
Condition
FA1 and FA2 octets are
detected once
FA1 and FA2 octets
are verified once
FA1 and FA2 octets are
not detected
4 consecutive
In-valid Frames
3 consecutive
Valid Frames
1 or 3 ms of operating
in the OOF condition
(user-selectable)
Frame Maintenance
Mode



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