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I am not sure exactly what you mean but lets start easy . If you want to reset a batch of logic (cmos / TTL) then I use a simple resistor and capacitor (1 meg .1uf) in series withe the centre point to the reset pins. If you have to start with a low then have the capacitor to ground and of course vice versa.
i really appreciate your responses. i'm trying to reset an HC11 MCU. i remember reading somewhere that a simple resistor/capacitor is not always the right way to go due to poor power supply during power on reset. (i think it's call brown out effect). so i guess i'm looking to design a power good circuit that assures that the power is good and then activates the resistor/capacitor to cause a reset signal. thanks!
i'll check out the ic that sebi suggested too. thanks!
There's a good selection of easy reset chip out there
...but please consider MAX809 or MAX810 from.... PHILIPS Semi.!!! YES - sounds like a MAXIM, but these are Dutch chips
Costs ~0.25euro, so this is peanut comparing sleepless nights of wondering does it hang up, or not (of course after delivery to customer).
And last but not least: it needs NO EXTERNAL components. Housed in small, nice SOT-23.
Watch the attachement for full specs (Vtreshold, output polarization etc.)