[Certified]

Thanks for pointing that out. I realized I called out the wrong chip. I was actually trying to call out the Max6818.

[theamk]

That's a neat chip, especial max6816/max6817 version in SOT23 package!

but yeah, very expensive for what it does. If my MCU was really short on interrupts, I'd go with I2C bus expander with 5v-tolerant inputs and INT output - sure, it needs explicit protection for 24V operation, but it also only needs 3 pins and 1 interrupt.