SN74LVC1G97: Truth Table Interpretation

John Westmoreland

Part Number: SN74LVC1G97

Hello All,

Looking at the datasheet and then looking at the truth table and Figure 5, for instance - I don't see those matching.

How is the logic and truth table supposed to be reconciled?

For figure 5 - for the top example - isn't Y = (A)' + B ? In the truth table - using the top row - it says Y = 0, but following the boolean equation, Y = 1.

So, how to determine which one is correct?

Thanks In Advance,
John W.

over 2 years ago

+1 John Westmoreland over 2 years ago

Prodigy 95 points

TI - disregard. I was looking at my schematic where I had tied IN1 to GND vs. pulling it high - and was looking at the truth table after that... oops. (Pin 1 tied low vs. pulled high....)

I guess I implemented the unobtainium gate. Ha!

0 Emrys Maier over 2 years ago in reply to John Westmoreland

TI__Guru* 96862 points

Hey John,

Thanks for the post - and I'm glad you figured it out.

Come back any time :)

0 John Westmoreland over 2 years ago in reply to Emrys Maier

Prodigy 95 points

Emrys,

Sure thing. These configurable logic gate parts are pretty cool. And propagation delays are either close enough or less than trying to string some gates together.

Best Regards,
John