HD74HC279 查看數據表（PDF） - Renesas Electronics

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HD74HC279

Octal D-type Flip-Flops (with Clear)

Renesas Electronics 

HD74HC279

Test Circuit

Measurement point

CL*

Waveforms

Note: CL includes the probe and fig capacitance.

• Waveform

tr

tf

90% 90%

S

50%

10%

50%

10%

tr

90%

R

10%

tf

90%

50%

10%

tPHL

tPLH

tPHL

90%

90%

Q

50%

50%

50%

10% 10%

tTHL

tTLH

Note : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns

VCC

0V

VCC

0V

VOH

VOL

Rev.2.00 Jan 31, 2006 page 4 of 5

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