Calculating Input capacitors for SN74LVTH16244 buffer

Thread Starter

HANAG

Joined Jan 19, 2018
3
Hi,
I wanted to know how to calculate the input capacitors for the SN74LVTH16244 buffer.
the Vcc is 3.3V and the output voltage is 3.3V.
Thank you for your help,
Hana
 

crutschow

Joined Mar 14, 2008
34,280
Experience has shown that ceramic capacitors in the size from 10nF to 100nF are effective at filtering the high frequency switching noise that digital circuits generate.
Typically the higher value of 100nF is recommended by most design sources.
 

crutschow

Joined Mar 14, 2008
34,280
And then you add another 10 to 100uf if you need to overcome voltage drops. (separate cap)
Good point.
There's generally just one or two of those per board, not one per chip as is recommended for the small ceramics.
They take care of the any lower frequency noise that may be on the power bus.
 
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