What IC is "293" "GZ624"?
My first guess would be that it is an LM293 dual voltage comparator.

The pin count is correct, the package style is correct, and there is a via coming off of pin 8 (Vcc on the LM293) to an internal layer, which would make sense if it was connecting to a Vcc plane. It would be helpful to see more of the circuit, but I expect this might be your best bet.