On 3/9/06, Michael Rigby-Jones wrote: > > > >-----Original Message----- > >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] > >Sent: 09 March 2006 05:32 > >To: Microcontroller discussion list - Public. > >Subject: Re: [EE] LVTTL Schmitt trigger non-inverting buffer - > >do they existin tiny packages? > > > > > >On 3/8/06, Michael Rigby-Jones wrote: > >> Help! > >> > >> Requirements: > >> > >> Supply voltage 3.3v > >> Input thresholds LVTTL (0.8v/2.0v) > >> Output thresholds CMOS (driving an AVR) > >> Schmitt Trigger > >> Smallest package possible e.g. Philips Pico-logic or TI's > >> NanoStar/NanoFree die-with-solder-bumps style would be perfect. > >> > >> I've been scouring various manufacturers web sites and nothing I can > >> see comes close, in particular I can't find a Schmitt trigger device > >> with true LVTTL compliant inputs. Do they exist? > > > >http://focus.ti.com/docs/prod/folders/print/sn74auc1g17.html > > Thanks Vasile, but that's 2.7v maximum supply. I need to go up to 3.3v +5% You can't, you need a 2V input requirement and a 3.3V output requirement. Use a 2V to 2.7V supply device with an open drain up to 3.3V. I had this problem too and never found such a gate (except the buffer level converter with many gates). Vasile -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist