XR20M1172G28-0B Datasheet, PDF (55/55 Pages) Exar Corporation – TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

REV. 1.2.0
XR20M1172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
REVISION HISTORY
DATE
REVISION
September 2006
P1.0.0
February 2007
June 2007
P1.0.1
1.0.0
June 2009
1.0.1
June 2011
1.0.2
July 2012
1.1.0
October 2013
1.2.0
DESCRIPTION
Preliminary Datasheet.
Updated Thermal Resistance Data.
Final Datasheet. Clarified pin descriptions. Updated DC Electrical Specifications.
Added UART Channel B select to Table 3.
Removed “DMA mode” since this is a legacy feature that is not supported in this
device. Added and updated maximum SPI clock frequency to the AC Electrical Char-
acteristics table for SPI-Bus Timing. Updated ordering information.
Clarified "OP2#" pin since the M1172 does not have OP2# output pin.
Changed "AC Electrical Characteristics-UART Clock" table according to the PCN12-
0614-02.
Clarified descriptions for FIFO and non-FIFO mode operation. Updated 32-pin QFN
and 28-pin TSSOP package drawings.
ECN 1342-25
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 2013 EXAR Corporation
Datasheet October 2013.
Send your UART technical inquiry with technical details to hotline: [e-mail].
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
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