How to sample 8 pins at 25 MHz and detect for 50ms periods:
all low
all high
mixed high and low
I want to make a logic probe type of thing that indicates the state of 8 lines. The 50ms limits the LED changes to 10 Hz which is easily visible. This way a quick pulse that you would never see in the LED would be visible.
What components would you recommend that can detect as small as a 40ns change (25 MHz)? I don't need to know how many - just sample for 50 milliseconds and each line needs LOW, HIGH, or MIXED.