Question for the electronics savvy amongst you... I am building a circuit to interface a PIC16C71 to a serial port. My initial plan was to use a MAX232A, but I have run across a stumbling block. On one specific design document (AN555 from microchip), there are three circuits listed for doing the voltagelevel translations. One is a two chip design in which I'm not interested, one is a single chip MAX232 based, and one is built up from basic components. What threw a monkey wrench at me was the fact that they specifically state that the third (component-based) circuit is for powering directly off the serial port, because of its low power draw. They saw nothing about doing this with the MAX232. Does that mean I will need to power the MAX232 off of something other than the serial port? Does a max232 draw more power, where it would exceed the spec of no more than 5mA? A 16c71 draws about 2mA; I can't expect that the MAX232 would draw more than 3, am I wrong? Am I missing some other crucial point here? James Davidheiser Drexel University Department of Physics "Tell a man that there are 400 billion stars and he'll believe you" "Say a bench has wet paint and he has to touch it" -- Subscription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org please, Please, *PLEASE* don't subscribe through a forward/false domain
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