I'm researching and trying to understand ELM's schematic for interfacing with an MMC/SD card and not quite sure what the P Channel MOSFET (Q1 located by coordinates C2) is doing.
I understand the basic use of FETs but I've never seen it used like this.
I found the part at Digikey http://search.digikey.com/script... but I'm looking for a through hole replacement. Would any >1.4A P Channel MOSFET work?
Would this be an adequate replacement? http://search.digikey.com/script...
http://elm-chan.org/fsw/ff/00ind... is where the project is originally from for anyone that is interested.
Thanks a lot for your time.