Inverting hysteresis comparator

$V_{out}=V_{SS}$ if $V_{in}>\frac{R1}{R1+R2}.V_{DD}+\frac{R2}{R1+R2}.V_{ref}$

$V_{out}=V_{DD}$ if $V_{in}<\frac{R1}{R1+R2}.V_{SS}+\frac{R2}{R1+R2}.V_{ref}$