U74HCT640

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 6

www.unisonic.com.tw

QW-R502-684.B

TEST CIRCUIT AND WAVEFORMS(Cont.)

0V

Voltage Waveforms

Propagation Delay and Output Transition Times

Input

Output

Output

V

M

10%

90%

10%

90%

10%

90%

10%

90%

V

M

V

M

V

M

0

V

Input

Output

Output

V

M

S1 at GND

Voltage Waveforms Enable and Disable Times

0V

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