- #1
j777
- 148
- 0
Hi,
I'm using a CPLD as an IO expander and I'm seeing +/- 200mV glitches with a 7ns period on the 3.3V supply (the CPLD uses this supply) when output pins are switched on and off. Based on the CPLD's datasheet the acceptable voltage range is 3.0V-3.6V. Are these glitches typical/safe or should I add some low value caps to cancel some of this noise?
I'm using a CPLD as an IO expander and I'm seeing +/- 200mV glitches with a 7ns period on the 3.3V supply (the CPLD uses this supply) when output pins are switched on and off. Based on the CPLD's datasheet the acceptable voltage range is 3.0V-3.6V. Are these glitches typical/safe or should I add some low value caps to cancel some of this noise?