________________________________________________________________________________

MODEL:  std273.vhd                                               VERSION:    1.1
DESCRIPTION:  D Flip-Flop with Clear                             DATE: 98 SEP 09
TIMING FILE:  std273.ftm                                         VERSION:    1.3
                                                                 DATE: 10 APR 28
LOCATION:  http://www.FreeModelFoundry.com/fmf_models/stnd/std273.vhd
LOCATION:  http://www.FreeModelFoundry.com/fmf_models/stnd/std273.ftm

LIBRARY:  STND

GENERIC PART NUMBERS COVERED:  54F273, 74AC273, 74ACT273, 74ACTQ273, 74ALS273,
                               74F273, 74LVC273

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SUPPORTED PART NUMBERS
    ____________________________________________________________________________

                   Fairchild Semicondutor

    Part Number                       Data Source
    ____________________________________________________________________________

    74ACTQ273PC                            2

    74ACTQ273SC                            2

    DM74ALS273MSA                          3

    DM74ALS273MW                           3

    DM74ALS273N                            3

    DM74ALS273SJ                           3

    ____________________________________________________________________________

                   Motorola, Inc.

    Part Number                       Data Source
    ____________________________________________________________________________

    MC74AC273DW                            1

    MC74AC273N                             1

    MC74ACT273DW                           1

    MC74ACT273N                            1

    ____________________________________________________________________________

                   National Semiconductor

    Part Number                       Data Source
    ____________________________________________________________________________

    54F273DM                               5

    54F273FM                               5

    54F273LM                               5

    74F273PC                               5

    74F273SC                               5

    74F273SJ                               5

    ____________________________________________________________________________

                   Philips Semiconductors

    Part Number                       Data Source
    ____________________________________________________________________________

    74LVC273BQ_2V7                         6

    74LVC273D_2V7                          6

    74LVC273DB_2V7                         6

    74LVC273PW_2V7                         6

    74LVC273BQ_3V3                         6

    74LVC273D_3V3                          6

    74LVC273DB_3V3                         6

    74LVC273PW_3V3                         6

    ____________________________________________________________________________
                   Texas Instruments

    Part Number                       Data Source
    ____________________________________________________________________________

    SN74ALS273DW                           4

    SN74ALS273N                            4

________________________________________________________________________________

DATA SOURCES

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

    1.   Motorola FACT Data DL138 Rev 3

    2.   National Semiconductor March 1993

    3.   Fairchild Semicondutor Datasheet February 1998

    4.   Texas Instruments SDAS218A-Revised December 1994

    5.   National Semiconductor May 1995

    6.   Philips Semiconductors Datasheet 2004 Mar 12