HD74HC595 查看數據表（PDF） - Renesas Electronics

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HD74HC595

8-bit Shift Register / Latch (with 3-state outputs)

Renesas Electronics 

HD74HC595

• Waveform – 5 (SCK to RCK)

tr

tf

90 %

90 %

VCC

Input SCK

50 %

10 %

10 %

0V

tsu

tw

90 %

VCC

Input RCK

50 %

50 %

10 %

10 %

0V

tr

tf

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

• Waveform – 6 (tZL, tZH, tLZ, tHZ)

tf

tr

Input G

90 %

50 %

90 %

VCC

50 %

10 %

10 %

0V

tZL

tLZ

VOH

Waveform - A

50 %

10 %

tZH

tHZ

VOL

90 %

VOH

Waveform - B

50 %

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 9 of 10

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