Other Parts Discussed in Thread: TINA-TI,
Tool/software: TINA-TI or Spice Models
Hello.
I`m simulating with a SN74HC244 ibis Model on ADS.
I found some issue unexpected.
here is issue.
if Input signal rate is fast(now simulating 25Mhz), the tR/tF of output become about 1ns with no cap& no load.
and input rate is 10MHz, the tR/tF of output become about 5ns.
is it normal or do i have some fault with simulation?
I red there is nessasory time for Tpd(Tplh & Tphl) on datasheet.
and i know it is severe condition for sn74hc244 buffer.
but i think It is abnormal to change tR/tF at buffer.
here is my simulation schemetic.
please let me know any solution or idea for understanding.