Consider the IDE/ATA bus which easily exceeds 25cm in length and is often driven by standard HCT outputs - ok, on modern IDE controllers you don't have the external controller chips anymore.
I have some older motherboards and controller cards (f)lying around here at my office and they have both TI's ABT family and 74LSxxx on them... Uwe. > Recently, Somebody Somewhere wrote these words >> Hi Declan, >> >> how many devices on the same bus? > There is 74bct all over this ISA card I'm trapping pulses on. > The particular chip is on a ribbon driving three other cards as well. It > is about 25cm long. That ISA bus has an isa mounted Industrial PC and 6 > Cards (Ind pc, nic, InterV3, Controller, & 3 x driver). Two ribbons are > fed to each driver card (The controller instructing the drivers, or > reading back) Other ribbons feed off thither and yon. This Controller > card is the centre of the universe here, and everything talks to it. > It's a pain in the face but the system is actually worth having - it > does function test, ASA, netgen, and is programmable. > I'd give you the url except diagnosys seem to have taken down it's > successor (Pinpoint 2) from their website to hawk their new FaultFinder > range. They seem to have Rolls Royce and Lada versions of that, but I'm > not bothered learning the difference. > Any clearer? >> >> Uwe. >> >> >> > This 74BCT is a Bus oriented logic family by Texas Instruments >> >> > Should I go shopping or can I stick in another more common logic type? >> >> > I'm looking at unit volumes for myself. >> > With best Regards, > Declan Moriarty. -- Author: Uwe Zimmermann 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).
