There was a whole family of 5xx parts made back in the day by Signetics. The 555 was one of the few that survived the test of time. There was a 567 tone decoder that also was popular and was made for many years. I am thinking most of this family was from the early 1970s or so.
Correct, the 555 came in 1971. Signetics was founded by disgruntled Fairchild employees that wanted to move to IC manufacturing, while Fairchild focused on discrete transistors. They just about failed when the feds approached them about making some custom ICs. They were the only game in town, so they succeeded. Philips bought them in the mid 70s I think. Now it's all part of NXP.
@@batman4e After a fashion, we do care about the manufacturer. TI is a good brand with very few and specific exceptions. They've acquired NatSemi. LM567 is a natsemi part. IIRC they make two versions of it: LM567-N in the legacy ("original") process, and LM567 on a more modern process.
As a video idea, you might like to put a triangle wave through a sine-wave shaper like how most analog function generators made sine waves. The idea is to use the diodes' exponential I-V curve to convert a triangle wave into a reasonable approximation of a sine wave. It doesn't take a lot of parts and many older op amp books had function generator circuits with a stage like this, if you want an example to go from.
I remember the ICL8038 and XR2206 which must be later versions of the principle. They have sine shapers on board and I found the ICL8038 quite useful as a basis for a simple function generator, (a very long time ago, maybe almost half a century).
Hope you're going to do the 567 and 568 PLL chips. Back in the mid to late 70s, these were like science fiction, not that the 555 wasnt treated the same. Signetics were ahead of the game.
Look at 567 and 568 chips, they compliment the 566 nicely. There's a 568 C or D (something like that) that can obtain lock from below 1Hz up to 150MHz.
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There was a whole family of 5xx parts made back in the day by Signetics. The 555 was one of the few that survived the test of time. There was a 567 tone decoder that also was popular and was made for many years. I am thinking most of this family was from the early 1970s or so.
Correct, the 555 came in 1971. Signetics was founded by disgruntled Fairchild employees that wanted to move to IC manufacturing, while Fairchild focused on discrete transistors. They just about failed when the feds approached them about making some custom ICs. They were the only game in town, so they succeeded. Philips bought them in the mid 70s I think. Now it's all part of NXP.
LM567 it is still in the production. It is made by Texas Instrument, but who cares about the manufacturer.
@@batman4e After a fashion, we do care about the manufacturer. TI is a good brand with very few and specific exceptions. They've acquired NatSemi. LM567 is a natsemi part. IIRC they make two versions of it: LM567-N in the legacy ("original") process, and LM567 on a more modern process.
Very cool, keep chip of the day coming
As a video idea, you might like to put a triangle wave through a sine-wave shaper like how most analog function generators made sine waves. The idea is to use the diodes' exponential I-V curve to convert a triangle wave into a reasonable approximation of a sine wave. It doesn't take a lot of parts and many older op amp books had function generator circuits with a stage like this, if you want an example to go from.
With a saw tooth on the modulation input you could make a sweep generator. Pretty neat!
I remember the ICL8038 and XR2206 which must be later versions of the principle. They have sine shapers on board and I found the ICL8038 quite useful as a basis for a simple function generator, (a very long time ago, maybe almost half a century).
I've never heard of these. Very useful.
I saw it on an exciter board of an old induction furnace long time ago.
It’s a shame these aren’t as available or common as a 555, they would make great synthesizer low frequency oscillators.
It's called the Modulation i/p as you can FM the output with a signal on this i/p.
Hello sir can you explain please how can I attach a microphone to the circuit.
Hope you're going to do the 567 and 568 PLL chips. Back in the mid to late 70s, these were like science fiction, not that the 555 wasnt treated the same. Signetics were ahead of the game.
567: ruclips.net/video/ocOgD9MaUjs/видео.html
@@IMSAIGuy and NE565, while we are at it
Chip of the day!!!
Why wouldn't I use an ICL8038 instead, it's a newer chip?
Because I would have to buy that one, this one was in my junk box
I wish I had one, it is pretty cool.
can these still be purchased?
www.utsource.net/itm/p/139135.html
Could use it as part of a phase locked loop?
Look at 567 and 568 chips, they compliment the 566 nicely. There's a 568 C or D (something like that) that can obtain lock from below 1Hz up to 150MHz.
567: ruclips.net/video/ocOgD9MaUjs/видео.html
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