We do not have a power calculation sheet for FRAM parts. I will demonstrate you one calculation manually. You can change any value accordingly to suit your application.
Theta Ja = 146 C/W
Power Dissipation Pd = Voltage x Current
Pd (max) = V (max) x I (max) (Under operating conditions)
Pd = 3.6 x 2.5 x 10 ^ -3 = 9 mW
Tj ( Junction Temperature max ) = Theta Ja x Pd + Ta (max)
Tj = 146 x 9 + 85
Tj = 86.314 C ( Max Tj under operating conditions)
VoH1 is the output high voltage when the device is selected (CS is low) while VoH2 is output high voltage when the device is deselected ( Device is in stand by). For interfacing it to other devices you can generally look to match VoH1.
Thanks and Regards,