SN74AUP1T17: Need some parameter for SN74AUP1T17DCKR

T_J(max) is 150 °C; see [FAQ] What is the maximum junction temperature (TJMAX) for a device?

R_θJC has not been measured/modelled because this device is not intended to be used with a heatsink. And in general, AUP low-power devices do not have thermal problems.