🇺🇦 haxadecimal 🚫👑Apr 7
Dear lazyweb,
Does anyone happen to know what company introduced the first TTL-compatible metal-can hybrid crystal oscillator in the DIP footprint (like a 14-pin DIP footprint, but with only the four corner pins), and when?
My web searches don't seem to yield relevant results. I'm not looking for the history of crystal oscillators in general. I think the type I've described appeared in the 1970s.
#hybrid #dip #crystal #oscillator
Show threadJohn Carlsen 🇺🇸🇳🇱🇪🇺Apr 7

@brouhaha

I recall using them in 1991 on the Media Vision Pro Audio Spectrum.

KDS (Japan) and Raltron are the brands I see on those assemblies.

Show thread🇺🇦 haxadecimal 🚫👑Apr 7
@johnlogic
I think I used CTS Knight, Fox (now Abracon), and ECS in the early 1980s. I'm trying to find earlier history of that oscillator type.
Show threadJohn Carlsen 🇺🇸🇳🇱🇪🇺

@brouhaha

I'm interested in learning more too.

I found this to narrow it down:

"In 1968, Juergen Staudte invented a photolithographic process for manufacturing quartz crystal oscillators while working at North American Aviation (now Rockwell) that allowed them to be made small enough for portable products like watches."

But that just refers to the crystals that were put in cans, not the integrated oscillator circuit. (I also learned that I've been using the wrong class code on my PCB references; they should be Y and G, respectively.)

https://en.wikipedia.org/wiki/Crystal_oscillator

Crystal oscillator - Wikipedia

Apr 7 at 2:10pmWeb