>The 555 itself is a very long way down the list of Things That Make Oscillators Drift.
Well, this is true, but the chip put constraints on the types of circuits you ended up with.
>Did you try polystyrene or polypropylene capacitors, or NPO ceramics?
Eh, I don't recall, as this was 25 years ago. Probably. We were making one or two of each product, so the cost of the parts was a rounding error compared to development and test.
>Sounds enlightened.
They had been burned a few times in a sort of public way. Yeah, it was overkill. On the other hand by that time you could already buy phase locked loops on a chip, so there wasn't really a reason to keep using the 555 as an oscillator unless you were making something that had to use really cheap parts.
Well, this is true, but the chip put constraints on the types of circuits you ended up with.
>Did you try polystyrene or polypropylene capacitors, or NPO ceramics?
Eh, I don't recall, as this was 25 years ago. Probably. We were making one or two of each product, so the cost of the parts was a rounding error compared to development and test.
>Sounds enlightened.
They had been burned a few times in a sort of public way. Yeah, it was overkill. On the other hand by that time you could already buy phase locked loops on a chip, so there wasn't really a reason to keep using the 555 as an oscillator unless you were making something that had to use really cheap parts.