Hello Atsushi-san,
The reason why VOH is not specified where as only VOL is specified in the data sheet is because the output pin is open drain configured. The output pin /OUT is active LOW and is an open drain configuration due to which only VOL is relevant in this case.
With regards to your recent post regarding the voltage range being 0.7V × Vs to Vs to detect a Voltage High(Logic 1) in Page 6 of the data sheet is with respect to the TRIPSET pin,which is an input pin.
Hope my explanation clears your doubt.
Best Regards,
Abhi Muppiri
Applications Engineer
AIP- Sensing Products
Texas Instruments