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Should have been brave enough to do that in the first place, turns out to be a MicrochipPIC16C74B-041/P4AP052338Hhttp://ww1.microchip.com/downloads/en/DeviceDoc/30605c.pdfI would assume its probably been factory programmed with some proprietry code. I wonder (hope) if its reprogrammable as I have inherited 20 of these with a job lot 'lucky dip' of components.
Yes, but look first before binning, as they could be blank still, just having the label on then never programmed.
Stick them in a programmer and do a blank check....... Otherwise place in breadboard and add crystal and reset, then apply power and look for activity on pins which says a program is running. Blank will do nothing other than count up address range and roll over.
Looking for any info for smd component marked "K4A".
It is a LM158 - a wide temperature range two opamp version of the common quad opamp LM324.
Here's an IC that is some kind of switch-mode controller. It's on an inverter-type microwave oven PCB which I'm interested in adapting as a HV power supply. Depending on whether the circuit is suitable.So far, no luck searching for the part number: AN9DB07SB 929S6E02