MC14502 if direct replacement of CD4502i also looked for CD4502A datasheet, and ended up with the same one
izua said:Completing my project with a simple display on the parallel port, i've decided using some ttl 7404 (i have some lying around) and bc107 transistors for driving the leds.
my 7404 are labeled as K561ЛН1 (i got them from an old shop, i guess they're from the former ussr - not sure though - but i bet they are, the man in there didn't had much clientelle).
i've got a table with analogies, and it says it's SN7404. I checked the datasheet on sn7404 and, surprise, there are 2 pinning modes, one for a "W" package and one for a "FW" package.
I don't know what my ICs are.
apart from the K561ЛН1 notation, there's also written 9212 Δ 2 and something looking remotely like a sun: a tiny circle, and above it, three growing ones, which are not fully drawn. i guess that's the companythat manufactured it, and that sun emblem made me think of the soviet union
anyway, my question is, what pinning does this thing use? is it the fw package, the w package, or something else?
you can find the datasheet for sn7404 here: http://focus.ti.com/lit/ds/symlink/sn74ls04.pdf[/url]
Not true, the Western manufactures use the same date codeIn Soviet Union/Russian/SNG numbering system, beside the part number, you may see:
- for example: 9212, that is manufacturing date code: year 1992, month 12. This is different from Western manufacturers as they will code year and week.
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