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REVISION HISTORY
DATE
REVISION
DESCRIPTION
July 2006
P1.0.0
Preliminary Datasheet.
September 2006
1.0.0
Final Datasheet. Updated AC Electrical Characteristics.
May 2007
1.0.1
Corrected pin names pin out assignment for 48-pin TQFP package for XR68M752 in
Motorola mode. Added GND center pad for QFN package to pin description. Added
Motorola mode Read/Write timing waveforms. Updated QFN package dimensions
drawing to show minimum "k" parameter.
May 2007
1.0.2
Updated pin description table, correct pin # of RXA in QFN-32 package.
December 2007
1.1.0
Added 49-pin STBGA package with these additional pins - PwrSave, ENIR# and
EN485#.
June 2009
1.1.1
Corrected page 30 FCR[7:6] and FCR[5:4] default trigger levels.
52
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 2008 EXAR Corporation
Datasheet June 2009.
Send your UART technical inquiry with technical details to hotline: uarttechsupport@exar.com.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
XR16M752/XR68M752
REV. 1.1.1
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO