Ordinary product with unexpected IC history
Added 2023-08-23 04:11:04 +0000 UTCThere are a few classic chips from the 70's and 80's that have remained in common use because they were based on building blocks that made them very versatile (like a precursor to modern microcontrollers).
This product contains an IC that dates back to 1983 and seems to have established itself as a standard component in the same hall of fame as the 555 and the 741 op-amp.
I didn't realise it had such a long history until I investigated why a chip with a Motorola code was being made by other manufacturers.
https://www.youtube.com/watch?v=qX6ZLLvBvNU
Comments
It's always good to feature in Hackaday.
Big Clive
2023-09-04 14:12:39 +0000 UTCJust found this: https://hackaday.com/2023/08/31/an-unexpected-appearance-of-an-iconic-motorola-chip/#more-613622
Ymir the Frost Giant
2023-09-03 18:30:49 +0000 UTCI've used this chip in past designs where I needed 5V for a micro and 12V for driving relays. I would always place a reverse-biased 5.1V or 6V zener across the 5V rail on the basis that if the controller IC went s/c it would clamp the voltage until the fuse blew. I never simulated this failure mode so not sure whether the zener would respond fast enough to suppress the transient. I know there are now custom ICs available which perform over/under voltage protection using MOSFETS and guarantee to safeguard the low-voltage parts against a fast rising input voltage..
Gordo
2023-09-02 14:08:34 +0000 UTCON Semi was Motorola spinning off their power semiconductor division. I both love and hate that chip. When it works, it works nicely, but when it fails.... it FAILS. A lot of that is because there have been die shrinks.
neal richard
2023-08-24 22:14:40 +0000 UTCIf it surprises BigClive, you know it has to be good.
Curtis Hoffmann
2023-08-24 01:46:06 +0000 UTC
