Ref this post: https://pinside.com/pinball/forum/topic/volume-suddenly-at-maximum-wpc-hurricane#post-6866321
It looked like rlbohon3 was able to source the U5 (X9C503) IC in ref. post. I'm working on a game that may need U5 (X9C503) replaced. I'm having trouble finding that IC, but there is a Maxim IC that is available and looks like it may be a compatible replacement (DS1804-050). Does anyone know if the Maxim chip will work as a substitute for the X9C503?