The Vol of the part is Vdd * 0.2 at 1.8 V Vdd and 1mA output. What is the Vol at 100uA and 1.8v Vdd.? I am driving a CMOS input with a max Vil of 0.2Vdd as well. I think this part may work as when driving a CMOS input the current at steady state ( after fall) will be in the uA range. Can you tell me the Vol at lower output currents?