> > What do you use the 74BCTxx for? Long lines > > or databus, or high current io? > The application is an isa card (vintage 1999) and the chip in questionj seems to drive a ribbon to other isa cards. > The linues are long by modern standards. There are loads of buses about the place. It isn't particularly for driving the extra milliamp. Speed could well be a factor.
ISA is not very fast but still needs decent signals. AT first that was a 4 MHz bus, later 10MHz if I remember well. There are several other manufacterers with bus logic. They do not all use BCT, but other names. 25 cm (I saw your other email) is very long. Instead of speed and current, you may be looking at impedance and reflection problems. Can't you get any original BCT logic anymore? That would prevent problems. I do wonder why the original parts broke down. Pieter ______________________________________________ Hoeben Electronics Phone: +31 6 51590081 Ronkert 44 Fax: +31 13 5096025 5094 EW Lage Mierde Private: +31 13 5096200 The Netherlands E-mail: [EMAIL PROTECTED] http://www.hoeben.com ______________________________________________ -- Author: Pieter Hoeben INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
