SN74LVC2G74-Q1: Threshold for trigger

Hi,

Are you looking for

1. Commercial or automotive? 

2. How many channels?

For a generic commercial 1-ch FF, the below device should work. 

https://www.ti.com/product/SN74LVC1G74 

For more recommendations please let me know your requirements. 

Should the output also be 450 mV? Then to handle analog voltages, you need a sample-and-hold circuit.

For logic gates, the trigger signals must be below V_IL or above V_IH, but not between. If you want different switching thresholds, you need to add a comparator.