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SN74AHCT541: Supply current and dissipation calculation

Part Number: SN74AHCT541


I see that Figure 5 on the datasheet shows 270mA @50MHz 3.3V operation. ((270e-3/8)/50e6)/3.3 = 204pF per channel. Why is the current in that figure this high? I see in section 7.9 the power dissipation capacitance per buffer as 33pF. So I'd expect 8*33pF*3.3V*50MHz = 43mA total supply current instead of 270mA.

Kind regards,