----- Original Message ----- From: "Dave VanHorn" To: Sent: Wednesday, September 24, 2003 2:20 PM Subject: Re: [EE:] rs232 line into digital I/O port??? > At 02:16 PM 9/24/2003 -0700, John Pearson wrote: > >I highly doubt it - I've never come across a single RS232 port that doesn't > >work fine with 5V levels > >(many thousand products in the field). > >Has anyone ...? > > It's a problem of margins. > RS-232 is designed to work in steel mills, under very adverse conditions. > > When you cheat, you spend some of the margin. > If the other guy spent your half already, then you're in trouble. > > Same thing on serial bit rates. Both of you can't be 6% off in opposite > directions, but one of you can. Actually, not my quote above. I messed up my responce to someone elses post and it appeared I was stating the whole thing. But, I was wondering if the 74LS125 could do the same thing as the TC7WH04FU. I like the enabling lines on the 74125, and wonder if the 74125 has a cmos equivalent? > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads