I think this is pretty common with transistors. A company is making a particular part, then a new, "better" part comes along that exceeds the spec of an existing part. So they start putting the new die into the old package as well as making the new part. Fewer dice to make likely means cheaper and less hassels. And they don't tell anyone.
Win-win, except the new part has a much higher Ft for example and formerly stable circuits now oscillate badly. Tilt! -John ============= > Hello, [snip] > Another story is about 2N3771 transistor, initially a single-diffussed > part, but later an epitaxial base part - with a lot more gain bandwidth > product. But since the 'new' 2N3771 meets and exceeds original 2N3771 > specs, the same part number was used - but the part is quite different > (and published specs continues being the JEDEC ones). So you can imagine > that in some applications it would be quite a lot of difference if you > breadboard with the older, and during the manufacturing phase you > (probably without knowing it) switch to the new part. [snip] > Best regards, > > Javier _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
