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Not only invented decades ago, but built decades ago. The "7949" on the chip means it was manufactured in the 49th week of 1979. Which is nearly 39 years ago.

Not only invented decades ago, but built decades ago. The "7949" on the chip means it was manufactured in the 49th week of 1979. Which is nearly 39 years ago. He's lucky to find a part like that. Today nobody is going to build a device in a 14-pin ceramic package and sell it for 15 cents.

ebikelaw 8y ago
That's a good point. The die in the SOIC package (the one that costs 15 cents) probably is smaller? Which means it might also have a different layout.
setquk 8y ago
The ceramic ones never cost 15 cents.