Does anyone have data on this IC?

[AmokCrow]

Last week I bought a few tubefuls of IC's from an army surplus store. The price there was $1/tube, so I bought numerous more or less random tubes. The rest were mostly 74lsxxx logic, but there was one chip I can't find any information on. The markings on IC are:
TOSHIBA
TMP82C43P
Japan9518H

I think the type of the chip from that mess is the 82C43, but no place I know has any info whatsoever. A few places sell them, but no datasheets were available. I have a total of 15 of these chips, so if anyone has any idea what they might be, I'd be grateful.

-Michael

P.S.
82C435 is not related.

[fredhs]

... the 82C43, but no place I know has any info whatsoever. A few places sell them, but no datasheets were available. ...

Michael,

does it have 24 pins?
If so, it is probably a 4x4 bit bus expander:

http://documents.rs-components.com/rs-bin/RightSite.dll/getcontent/data.pdf?DMW_FORMAT=pdf&DMW_OBJECTID=0900766b800264b1&DMW_DOCBASE=techlib

Fred

[AmokCrow]

Fred,

Thank you. I think this document matches the chip. 24 feet and all. Seems like I really got more than my money's worth. Hmm... Would you happen to know any uses for these? With logics and PICs I'm cool, but these are way over my limited expertise :confused: .

Also, if anyone would happen to need one, well, I'd hate to see them go to garbage. Me finding use for these in the foreseeable future is unlikely.

-Michael

[fredhs]

....any uses for these? ...

Michael,

modern microcontrollers do make our life easy, because we usually do not have to worry about data and address bus structures. Unless you want to design your own I/O ports or find another custom use for this IC, I'd consider it outdated, obsolete, or whatever term you choose. Nowadays, silicon manufacturers prefer the term "mature product" for such chips.

Fred

[INewton]

Michael,

modern microcontrollers do make our life easy, because we usually do not have to worry about data and address bus structures. Unless you want to design your own I/O ports or find another custom use for this IC, I'd consider it outdated, obsolete, or whatever term you choose. Nowadays, silicon manufacturers prefer the term "mature product" for such chips.

Fred

I believe the correct technical term for this chip is "landfill".