I'm trying to use a 74HC93 counter. It was working fine when the clock was 4 MHz, but when it is increased to 10 MHz the output is not producing what I expect it to be, so I was thinking that maybe the 74HC93 doesn't work at that frequency.
I have been looking at the datasheet to check for the max. frequency of the 74HC93, and from what I've gathered I need to look at both the propagation delay time and the output transition time. The problem is the voltages in the datasheet aren't the same as mine.
The datasheet's propagation delay time and output transition time are specified for 2, 4.5, and 6 V, but my microcontroller's voltage is 3 V, so how am I going to get the right data for my voltage?
Also, am I right in thinking that the max. frequency that the 74HC93 counter can take can be calculated by 1/(propagation delay time + output transition time) at the right ambient temperature?