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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490,491_101_062711
Model Temperature Range Package
SP490CN-L. ................................................................................... 0˚C to +70˚C ............................................................................... 8-Pin NSOIC
SP490CN-L/TR .............................................................................. 0˚C to +70˚C ............................................................................... 8-Pin NSOIC
SP490EN-L .................................................................................. -40˚C to +85˚C .............................................................................. 8-Pin NSOIC
SP490EN=L/TR............................................................................ -40˚C to +85˚C .............................................................................. 8-Pin NSOIC
SP491CN-L .................................................................................... 0˚C to +70˚C .............................................................................. 14-Pin NSOIC
SP491CN/TR-L .............................................................................. 0˚C to +70˚C .............................................................................. 14-Pin NSOIC
SP491EN-L .................................................................................. -40˚C to +85˚C ............................................................................. 14-Pin NSOIC
SP491EN-L/TR ............................................................................ -40˚C to +85˚C ............................................................................. 14-Pin NSOIC
/TR = Tape and Reel
Pack quantity is 2500 for NSOIC.
ORDERING INFORMATION
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil-
ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for
illustration purposes and may vary depending upon a user's specic 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 signicantly affect its safety or effectiveness. Products are not authorized for
use in such applications unless EXAR Corporation receives, in writting, 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 2011 EXAR Corporation
Datasheet May 2011
Send your serial transceiver technical inquiry with technical details to: serialtechsupport@exar.com
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
REVISION HISTORY
Date Revision Description
02/24/05 - Sipex Legacy Data Sheet
07/14/08 1.0.0 Convert to Exar format.
June 2011 1.0.1 Remove minimum entry to Driver Short Circuit Current. Change SP490
receiver propagation typical to 45ns. Remove SP491 receiver short
circuit current minimum entry. Change SP491 receiver propagation
delay MIN and TYP levels to 20 and 45ns respectively. Change SP491
receiver Enable and Disable time TYP and MAX levels to 45 and 70ns
respectively. Change SP491 Supply Current TYP to 900µA. Remove
SP491 driver rise/fall time minimum. Update ordering information.
