UPD78F9234MC-5A4-A Datasheet, PDF (359/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 23 ELECTRICAL SPECIFICATIONS ((A2) grade product)
Note 2.
(A2) grade product TA = −40 to +125°C
This varies depending on the allowable total loss (see the figure below).
150
120
110
100
50
−40
0
+40
+80
+120
Temperature [˚C]
+85
+125
Use the following formula to perform design such that the sum of the power consumption of the device is
less than or equal to the total loss PT (use at 80% or less of the rated value is recommended).
• Total power consumption = VDD × {IDD − ∑IOH} + ∑{(VDD − VOH) × IOH} + ∑(VOL × IOL)
When guaranteeing the internal pull-up resistor, use the following formula to calculate its power
consumption, and add the result to the result above.
• Power consumption of internal pull-up resistor = Σ(VDD/RPU × VDD)
User’s Manual U17446EJ5V0UD
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