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ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
REV. 4.2.0
REVISION HISTORY
DATE
REVISION
DESCRIPTION
January 2003
Rev 4.0.0
Changed to standard style format. Clarified that the TX interrupt is not MS Windows
compatible. Clarified timing diagrams. Renamed Rclk (Receive Clock) to Bclk (Baud
Clock) and timing symbols. Added TAH, TCS and OSC.
April 2003
Rev 4.0.1
Rev 4.1.0
Rev 4.2.0
Updated Ordering Information.
September 2003
October 2003
Added Status Column to Ordering Information.
Clarified compatibility to industry standard 16550 and MS Windows standard serial
port driver in General Description. Removed Auto RTS flow control from MCR bit-1
description since that feature is not available in this device.
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 2003 EXAR Corporation
Datasheet October 2003.
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.
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EXAR [ EXAR CORPORATION ]
