M74HC390 데이터 시트보기 (PDF) - STMicroelectronics

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M74HC390

DUAL DECADE COUNTER

STMicroelectronics 

M54/M74HC390

TEST CIRCUIT ICC (Opr.)

WHEN THE OUTPUTS DRIVE CAPACITIVE LOAD, TOTAL CURRENT CONSUMPTION IS TO BE A SUM OF THE VALUE CALCULATED

FROM CPD AND ∆ICC OBTAINED FROM THE FOLLOWING FORMULA.

∆ICC =

fCK . VCC .

Ca

2

+

fCK

2

. VCC .

2Cb





5

+

Cc

5

+

Cd

5





Ca – Cd ARE THE CAPACITANCE AT QA ∼ QD OUTPUT.

SWITCHING CHARACTERISTICS TEST WAVEFORM

8/13

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