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SN74LVC1G99: logic solution

Cera Wei
Intellectual 2010 points
Part Number: SN74LVC1G99
Other Parts Discussed in Thread: SN74LVC32A, SN74LVC2G00, SN74HC32

Hi team

Do we have any integrated solution for this logic: CS5=!(!CS*A2*!A1*A0*!RD)?

Thanks,

Cera

  • 0
    TI__Guru* 96661 points

    Hi Cera,

    We don't have a single chip solution for such a complex logic function, however, DeMorgan’s Theorem allows for a quick simplification that will reduce the above equation to only need two standard logic devices:

    CS5 = !( CS + A1 + RD + !( A0 * A2 ) )

    I have made a simplified schematic to show the required gates:

    Depending on the voltage range requirements, the OR gates could come from an SN74LVC32A (1.8-3.3V) or an SN74HC32 (5V), and the NAND gates would be best from SN74LVC2G00.

  • 0 in reply to Emrys Maier
    TI__Intellectual 2010 points
    Hi Emrys,

    Thanks for your kind help.

    I think the CS5 should be !(!CS*A2*!A1*A0*!RD)= CS + A1 + RD + !( A0 * A2 ), so we can use one channel NAND gate SN74LVC1G000.

    Regards,
    Cera