M74HC390 Просмотр технического описания (PDF) - STMicroelectronics

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M74HC390

Dual decade counter

STMicroelectronics 

Test circuit

8

Test circuit

Figure 7. Test circuit

M74HC390

Note:

CL = 50pF or equivalent (includes jig and probe capacitance)

RT = ZOUT of pulse generator (typically 50Ω)

9

Waveforms

Figure 8. Clock waveform (f = 1MHz; 50% duty cycle)

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