39

ST16C552/552A

Rev. 3.40

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

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 2003 EXAR Corporation

Datasheet September 2003

Send your UART technical inquiry with technical details to hotline: uarttechsupport@exar.com

Reproduction, in part or whole, without prior written consent of EXAR Corporation is prohibited.

EXPLANATION OF DATA SHEET REVISIONS:

FROM

TO

CHANGES

DATE

3.30

3.40

Added revision history. Added Device Status in Ordering Information.

Dec 2003

Device revisions of "F" and newer have 5V tolerant inputs except for

XTAL1 and printer port inputs. Device revisions of "E" and older do not

have 5V tolerant inputs.