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NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to
improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any
circuits described herein, conveys no license under any patent or other right, and makes no representation that
the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration
purposes and may vary depending upon a user’s specific application. While the information in this publication
has been carefully checked; no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the
failure or malfunction of the product can reasonably be expected to cause failure of the life support system or
to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless
EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has
been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately
protected under the circumstances.
Copyright 2006 EXAR Corporation
Datasheet November 2006.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
XRT94L43
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
REVISION HISTORY
REVISION #
DATE
DESCRIPTION
P1.0.0
July 2002
Short form.
P1.0.1
July 2002
Added pin out and Register tables.
P1.0.2
August 2002
Added descriptive sections.
P1.0.3
August 2002
Added more description to sections.
P1.0.4
September 2002
Corrected Direct Addreses by adding 100Hex to each.
P1.0.4
December 2002
Added SDH Register tables and Direct addressing pin out. Made minor edits to
tesxt and broke data sheet into three books, (Description and pin outs, Sonet
Registers and SDH Registers.
P1.0.5
May 2002
Added electrical characteristics.
1.0.0
June 2004
Final edits, release to production
1.0.1
July 2006
Made edits to pin descriptions
1.0.2
November 2006
Added/changed block diagrams and features.