DAN-140 Datasheet, PDF (3/3 Pages) Exar Corporation – EXAR’S XR16C850 COMPARED

1.4 REPLACING THE OX16C950 WITH THE XR16C850
You can directly replace Oxford’s OX16C950 with Exar’s XR16C850 in the 48-TQFP or 44-PLCC package
if the INTSEL# pin of the OX16C950 is tied to VCC as described previously in the Hardware Differences
section. If using the XR16C850 in the other packages, hardware changes will be required since the
OX16C950 is not available in those packages.
There should not be any timing problems replacing the OX16C950 with the XR16C850 because it is more
flexible than the OX16C950 as described in the bus timing section.
The software will need to be updated to take advantage of the enhanced features of the XR16C850 that
are not available in or different from the OX16C950.
In a nutshell, the XR16C850 and OX16C950 are available in similar packages and have similar features
but the XR16C850 has a much simpler internal register set for faster and easier software development.
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 represen-
tation 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 sys-
tem or to significantly affect its safety or effectiveness. Products are not authorized for use in such applica-
tions 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 Corpo-
ration is adequately protected under the circumstances.
Copyright 2002 EXAR Corporation
August 2002
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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