Who made this IC?

Matthew:

Mfg could be TESLA. See for example:

we used the TL501 (obsoleted by TI). Company may be gone by now, it only made replacement chips AFAIK. They used the same type numbers as the original mfg.

Regards, Arie de Muynck

TESLA is/was a (IIRC) Hungarian chip (and consumer electronics) manufacturer.

Best regards, Spehro Pefhany

"

Tesla made the worst 7805 regulators I have ever seen, both physically and electrically. About 20% of the regulators gave less than 4.75 Volts. I think they were russian, and possibly they are not in business today.

Regards Miguel Giménez

Tesla TTL's were even worse - sometimes only 20% of parst were usable :(

Tesla parts were Czech ;)

MH74755 - I can't find in it Tesla catalog on net

If it isn't a special product look again on it. It can be one of MH74155 = SN74155 or MH7475S = SN74S75

Mirek

I read in sci.electronics.design that JeffM wrote (in ) about 'Who made this IC?', on Sat, 24 Jul 2004:

It's a bit difficult to tell; it's too small to read the type number.

-- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited.