Here is the DIP I have:
FD633D 1230
I've tried to search for it and the only good result I get is this for sale at E-Bay and AliExpress and the page has no details regarding it. I tried contacting the seller but they don't have any datasheet.
Any help is appreciated.
Edit 1: It was from a Chinese seller so it might be a Chinese manufacturer. Also this same thing was being sold by several other sellers with different brand names, but same logo on the chip.
Best Answer
It's made by Fuda Hisi Microelectronics in Fuzhou, China. A CMOS LED and key scan device.
I don't see a working datasheet link.