SN74HC125: Specification information of Vcc= 3.3V in Switching Characteristics

Conor

Guru 12065 points

Part Number: SN74HC125
Other Parts Discussed in Thread: SN74LVC125A, SN74LV125A, SN74AHC125

Hi,

Regarding the Switching Characteristics in the data sheet, is it possible to provide information when Vcc = 3.3V? Or please give me some reference information.

There is quite a difference between 2V and 4.5V listed in the data sheet, so I would like to know the information for VCC=3.3V.

Thanks,

Conor

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 316470 points

See [FAQ] What are the performance specifications of the HCS logic family at 3.3V operation? (But most HC devices do not have Schmitt-trigger inputs.)

0 Conor over 1 year ago in reply to Clemens Ladisch

Guru 12065 points

Looking at the data sheet, it appears that it is not linear interpolation between 2V and 6V.
Is the thread you mentioned helpful in calculating specs such as Tpd@VCC=3.3V?

0 Malcolm Lyn over 1 year ago in reply to Conor

TI__Mastermind 25670 points

Yes, you should be able to approximate Tpd and other timing specs using linear interpolation.

0 Clemens Ladisch over 1 year ago in reply to Conor

Guru 316470 points

If you really care about 3.3 V specifications, use a more modern logic family, e.g., SN74AHC125, SN74LV125A, SN74LVC125A.

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SN74HC125: Specification information of Vcc= 3.3V in Switching Characteristics