AD8561 Latch function not working in simulation. I'm simulating a circuit using the AD8561 and not able to get the latch function to work. I set up a simple test circuit with 5V pwr and GND (a single supply circuit). I put a reference voltage on one input and a pulse source on the other. The Q and NQ outputs work and change as expected. When I add a pulse source to the Latch input, the outputs never latch. In my simulation I wait 1ms after the inputs change to assert the latch but the output does not latch. Set up a pulse source (0-5V) that is "held" on the Latch input. I'm using Microcap that can read PSpice files. (All the other AD spice models I have used work fine in this simulator). I looked at the AD subcircuit model syntax for the latch and switch sections and they look okay. No errors from the simulator. May try in LTsice to see if I get a different result. Any suggestions?