I was wondering if anyone has come across a chip which only outputs a reset pulse when a controlling input signal is greater than say 40us. I am looking to provide a reset to a chip but with pulse filtering. I don't really care how long the output pulse last for.
I have been looking at POR chips and the MR inputs to them but they all either react instantly or with minimum activation time in the milliseconds.
I need the reset to not react below 40us but activate before 100us. Also looked at smart threshold chips from ST and switch debouncers but they all react too slow :-(. I also don't want an RC filter as the timing isn't repeatable and a second 'glitch' could activate the reset before the 40us if the cap was still charged.
I don't have a lot of space on my PCB so looking for a small chip that satisfy these requirements.
Has anyone come across something similar.
Thanks in advance for any advice you can give.
BR
AH
I have been looking at POR chips and the MR inputs to them but they all either react instantly or with minimum activation time in the milliseconds.
I need the reset to not react below 40us but activate before 100us. Also looked at smart threshold chips from ST and switch debouncers but they all react too slow :-(. I also don't want an RC filter as the timing isn't repeatable and a second 'glitch' could activate the reset before the 40us if the cap was still charged.
I don't have a lot of space on my PCB so looking for a small chip that satisfy these requirements.
Has anyone come across something similar.
Thanks in advance for any advice you can give.
BR
AH