HD74HC574FPEL Ver la hoja de datos (PDF) - Renesas Electronics

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HD74HC574FPEL

HD74HC564, HD74HC574 / Octal D-type Flip-Flops (with 3-state outputs)

Renesas Electronics 

HD74HC564, HD74HC574

Waveforms

• Waveform – 1

Input Clock

Input Data

Output Q

Output Q

tr

tf

10 %

tr

90 % 90 %

50 %

10 %

tf

90 %

90 %

10 %

tPLH

10 %

50 %

50 %

tPHL

50 %

VCC

0V

VCC

0V

VOH

VOL

• Waveform – 2

tf

tr

Input OC

90 %

50 %

90 %

VCC

50 %

10 %

10 %

0V

tZL

tLZ

VOH

Waveform - A

50 %

10 %

tZH

tHZ

VOL

Waveform - B

50 %

90 %

VOH

VOL

Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns

2. Waveform - A is for an output with internal conditions such that the

output is low except when disabled by the output control.

3. Waveform - B is for an output with internal conditions such that the

output is high except when disabled by the output control.

4. The output are measured one at a time with one transition per measurement.

Rev.2.00 Mar 30, 2006 page 7 of 9

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