I have a rail of unidentified SOIC-8 ICs with marking
501
115
Nothing else. No manufaturers logo, no nothing. Does anybody know what this could be?
edit
(picture added)
At 3mm they're quite high for SOIC-8, so they could be optocouplers or so?
Grid is 5mm. (Yes, I know the devices aren't properly aligned, but I did this on my scanner with a sheet of paper over the devices…:-))
update/conclusion
It's almost certainly an Agilent HCPL-0501. The marking matches completely: the 501 refers to the type number, the 115 means week 15 of the year 2001. And the date code appears below the type number (which was a problem with the TR115).
Also diode tests all pass. The 5-6 test which passed was an error; I probably held the testprobe on pin 6 and 7 simultaneously, and 5-7 is the transistor's base-emitter diode.
Thanks for all the replies.
Best Answer
I had the same problem with a similar component, but finally I found it. You were right; it is an optocoupler: HCPL0501. Check the Fairchild HCPL0XXX datasheet.
If you want to look for similar components just type HCPL-0xxx and the mark code on your IC. Good luck!