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MODEL:  if490.vhd                                                VERSION:    1.0
DESCRIPTION:  RS485/RS422 Differential Transceiver               DATE: 98 MAY 15
TIMING FILE:  if490.ftm                                          VERSION:    1.0
                                                                 DATE: 98 MAY 15

LIBRARY:  IF

GENERIC PART NUMBERS COVERED:  490, 490E

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SUPPORTED PART NUMBERS
    ____________________________________________________________________________

                   Linear Technology

    Part Number                       Data Source
    ____________________________________________________________________________

    LTC490CN8                              1

    LTC490CS8                              1

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                   Maxim Integrated Products

    Part Number                       Data Source
    ____________________________________________________________________________

    MAX490CPD                              2

    MAX490CSD                              2

    MAX490EPD                              2

    MAX490ESD                              2

    MAX490MJD                              2

    MAX490ECPD                             3

    MAX490ECSD                             3

    MAX490EEPD                             3

    MAX490EESD                             3

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DATA SOURCES

    These are the primary sources of data used in determining behaviour and 
    timing of the components represented by this model.

    1.   Linear Technology undated data sheet

    2.   Maxim Integrated Products 19-0122 Rev 5, 2/96

    3.   Maxim Integrated Products 19-0410 Rev 3, 7/96