paravia@csd4.milw.wisc.edu (Mark David Kakatsch) (01/28/89)
Hello. At a recent SwapFest here in the milwaukee area, I picked up a (more or less) full s-100 system for approx. $65. The CPU board is an "Ithaca Audio" Z-80 board, and it won't be too hard to fix up...However, my problem is a few chips on the board. From the schematics, you can tell that they are buffer chips such as the 74LS245, or '374, albeit they have only 16 pins. Their part numbers are 8T97 and 8T98. Does anybody know if they are still produced, and if so, where they are available? Thanks much... Mark
scjones@sdrc.UUCP (Larry Jones) (01/29/89)
In article <617@csd4.milw.wisc.edu>, paravia@csd4.milw.wisc.edu (Mark David Kakatsch) writes: > From the schematics, you can tell that they are buffer > chips such as the 74LS245, or '374, albeit they have only 16 pins. Their part > numbers are 8T97 and 8T98. Does anybody know if they are still produced, and if > so, where they are available? Thanks much... Ah, yes, I remember them well. They're hex tri-state buffers -- the 8T97 is non-inverting and the 8T98 is inverting. I don't know if you can still get them or not, but you might have better luck looking for 8097 and 8098 which are equivalents from another manufacturer. I have pin-outs and specs if that would be of any use and I may even have some in the old junk box, but I'd have to look. ---- Larry Jones UUCP: uunet!sdrc!scjones SDRC scjones@sdrc.UU.NET 2000 Eastman Dr. BIX: ltl Milford, OH 45150 AT&T: (513) 576-2070 "When all else fails, read the directions."
gbell@pnet12.cts.com (Greg Bell) (01/29/89)
paravia@csd4.milw.wisc.edu (Mark David Kakatsch) writes: >Hello. At a recent SwapFest here in the milwaukee area, I picked up a (more or >less) full s-100 system for approx. $65. The CPU board is an "Ithaca Audio" >numbers are 8T97 and 8T98. Does anybody know if they are still produced, and if >so, where they are available? Thanks much... > Jameco lists both of those (8T97 and 8T98) as Signetics chips. They are described as "High Speed Tri-State Hex Buffer" for $.75 and "High Speed Tri-State Hex Inverter" for $.75 (respectively). Greg Bell_________________________________________________________ Hardware hacker | Electronics hobbyist | UUCP: uunet!serene!pnet12!gbell EE major at UC San Diego |
scjones@sdrc.UUCP (Larry Jones) (01/29/89)
Further research reveals that they are also equivalent to the 74367 and 74368 which you should have no trouble locating. (I KNEW those 10 year old IC Masters would come in handy some day!) ---- Larry Jones UUCP: uunet!sdrc!scjones SDRC scjones@sdrc.UU.NET 2000 Eastman Dr. BIX: ltl Milford, OH 45150 AT&T: (513) 576-2070 "When all else fails, read the directions."
sgt@dukeac.UUCP (Stephen G. Tell) (01/29/89)
About 5 years ago I built an S-100 system starting with a bare Ithaca Audio front panel board that I bought at a flea market. I found that Ithaca was still in business in some form or other, and was able to get a complete manual for the thing after signing a non-disclosure agreement. If you can't find them, let me know and I'll try to dig up the address, which may take a while since the docs are home in NJ and I'm at school here in NC. As for the chips, posssibly they are 8000 series TTL? (81LS97, 81LS98) or somthing? some of the mail-order companies still carry these; Jameco used to. Looking at their catalog and my 1981 Natioal Semiconductor databook; they both list an 81LS95 through '98, but they're 20-pin devices. My Ithaca board used some chips in this series; they turned out to be very like 74LS244's with different pinouts. I got them someplace; probably Jameco but I don't remember. My National databook lists a whole slew of TTL stuff with 8000 series numbers. Your best bet for definitive info on what the chips are is a good collection of databooks. There are lots of chips our there that we've never heard of. -- Steve Tell: senior, Duke University school of Engineering (please hire me). Former Chief Engineer, Cable 13 / Duke Union Community Television. sgt@dukeac.ac.duke.edu; !mcnc!ecsgate!dukeac!sgt
paravia@csd4.milw.wisc.edu (Mark David Kakatsch) (01/29/89)
Hello. I'd like to thank all of those that responded to my question about the 8T97 and 8T98. It seems that Jameco STILL carries them, and the 'LS367-368, so I'm about to order a small supply of those before they run out...(You know how fast those get taken....:-) ) Thanks again! Mark +-----------------------------------------------------------------------------+ + Things are not what | Albert Einstein got his name after he got smashed + + they appear to be...| from drinking only one stien of beer. Hence; Albert + +______________________| EinStien. + + + + Mark D. Kakatsch ---> paravia@csd4.milw.wisc.edu + +-----------------------------------------------------------------------------+
A-N-Onymouse@cup.portal.com (John - DeBert) (01/30/89)
In article (617@csd4.milw.wisc.edu), paravia@csd4.milw.wisc.edu (Mark David Kakatsch) writes, >Hello. At a recent SwapFest here in the milwaukee area, I picked up a (more or >less) full s-100 system for approx. $65. The CPU board is an "Ithaca Audio" >Z-80 board, and it won't be too hard to fix up...However, my problem is a few >chips on the board. From the schematics, you can tell that they are buffer >chips such as the 74LS245, or '374, albeit they have only 16 pins. Their part >numbers are 8T97 and 8T98. Does anybody know if they are still produced, and if >so, where they are available? Thanks much... > >Mark The 8T97 and 8T98 are buffer devices for bus i/o. They are still being made and can be had from various electronics parts suppliers such as Jameco or JDR Microdevices. Offhand, I don't recall which does what exactly. I believe that they are tristate devices. JJD A-N-Onymouse@cup.portal.com
twheless@hpbsla.HP.COM (01/31/89)
/ hpbsla:sci.electronics / paravia@csd4.milw.wisc.edu (Mark David Kakatsch) / 8:29 am Jan 29, 1989 / Hello. I'd like to thank all of those that responded to my question about the 8T97 and 8T98. It seems that Jameco STILL carries them, and the 'LS367-368, so I'm about to order a small supply of those before they run out...(You know how fast those get taken....:-) ) Thanks again! Mark +-----------------------------------------------------------------------------+ + Things are not what | Albert Einstein got his name after he got smashed + + they appear to be...| from drinking only one stien of beer. Hence; Albert + +______________________| EinStien. + + + + Mark D. Kakatsch ---> paravia@csd4.milw.wisc.edu + +-----------------------------------------------------------------------------+ ----------
koontz@oregon (01/31/89)
In article <617@csd4.milw.wisc.edu>, paravia@csd4.milw.wisc.edu (Mark David Kakatsch) writes: > Hello. At a recent SwapFest here in the milwaukee area, I picked up a (more or > less) full s-100 system for approx. $65. The CPU board is an "Ithaca Audio" > Z-80 board, and it won't be too hard to fix up...However, my problem is a > few chips on the board. From the schematics, you can tell that they are > buffer >...Their > part numbers are 8T97 and 8T98. Does anybody know if they are still produced, and if > so, where they are available? Thanks much... > > Mark Signetics parts 8T97 may be replaced with a 74366 8T98 may be replaced with a 74368 Check for differences in propagation and tristate times, probably is a don't care.
ciciora@tramp.Colorado.EDU (Ciciora; Steven joseph) (01/31/89)
In article <520@sdrc.UUCP> scjones@sdrc.UUCP (Larry Jones) writes: >In article <617@csd4.milw.wisc.edu>, paravia@csd4.milw.wisc.edu (Mark David Kakatsch) writes: > >Ah, yes, I remember them well. They're hex tri-state buffers -- >the 8T97 is non-inverting and the 8T98 is inverting. I don't >know if you can still get them or not, but you might have better >luck looking for 8097 and 8098 which are equivalents from another >manufacturer. I have pin-outs and specs if that would be of any >use and I may even have some in the old junk box, but I'd have to >look. > Sorry, my data books are in the process of moving to a new home, so I'm not sure. If I remember right, the 8T97 is the same pin -out of a 74ls367. I believe I even replaced the 8T97 w/ 74ls367 in an old apple ][ for a freind years back. Don't know about loading, current output, speed, etc. Steven Ciciora