I'm a bit curious when the classic MC34063 IC was introduced, today available as the -A version (MC34063A).
I'm trying to get an idea when some of the classic switching controller ICs were introduced because it marks the point when switchers started to become ubiquitous.
It appears that 1975-1977 were the years when the allegedly first PWM controller IC, SG1524, was developed and introduced into the market (IEEE, Power Electronics Magazine, NASA - pdf, p. 468). To get a better idea, I am also interested in other ICs that were and are widely used, like the MC34063(A).
If I read the available information correctly, it was Motorola (now OnSemi) who first made this part, and it was or is also available from competitors such as Sipex, TI, ST, Fairchild and some smaller ones I've never heard before. Some of these just seem to have slapped their logo on top of the original data sheet, copying even the original scope screenshot along with the typical data diagrams B34063A, UTCMC34063A, HTC, MC34063, CP34063A. Looking at all these cross-references (knock offs?!), one could get the idea that the original design team is invited to feel very honored, loosely quoting Confucius.
The earliest individual Motorola Data Sheet I could find is Rev 5, dated 1996 and the device is also listed in Motorola's Linear / Interface ICs Device Data Book, Vol. 1, Rev. 4, 1993, but it's not a new device in this source either.
1990 seems to mark the upgrade from the MC34063 to the MC34063A: In Motorola's Linear & Interface IC Data Book, 1990, the MC34063 is listed as "Not For New Deisgn-Ins", and the -A version's data is printed on the following pages.
I couldn't find any earlier sources, and I don't have any early data books by Motorola on my shelves. Any sources, preferably with pdf download links, are welcome!