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SN74LVC1G34: SN74LVC1G34 vs SN74LVC2G34 (Input transition rise or fall rate)

Oliver Schmutz1
Prodigy 10 points
Part Number: SN74LVC1G34
Other Parts Discussed in Thread: SN74LVC2G34,

Hi Community

I used until now a dual Buffer gate SN74LVC2G34.

But now I just need only one buffer (PCB size is also a problem). But with same or better speed performance than the above mentioned.

I found the SN74LVC1G34. But i tlooks like they are different.

Is this just a mistake or is it true that the single buffer gate has a "slower" transiation time?

SN74LVC2G34

SN74LVC1G34

On the switching characteristic page they have almost same values.

SN74LVC2G34

SN74LVC1G34

Br Oliver

  • 0
    TI__Genius 16725 points

    Hi Oliver,

    I think there is some clarification required. The input transition rate is how slow of a rising or falling edge you can apply on the part. Here is an FAQ on slow edges on CMOS inputs:

    https://e2e.ti.com/support/logic/f/151/t/737694?tisearch=e2e-quicksearch&keymatch=FAQ%20slow

    It is better to have a higher maximum input transition time because this means the device is robust and can handle slow edged signals. The single buffer gate is better in performance than the dual gate. You can apply as fast of an edge on input of the device as you want. It just cannot be slower than the spec that is listed. The "speed" of the device is measured by tpd and you will the 1G34 has better speeds.

    Thanks!

    -Karan