HD74HC374_15 Datasheet, PDF (8/11 Pages) Renesas Technology Corp – Octal D-type Flip-Flops (with 3-state outputs)

HD74HC374, HD74HC534
Waveforms
• Waveform – 1
Input CLK
Input D
Output Q
Output Q
t_r
t_f
10 %
t_r
90 % 90 %
50 %
10 %
t_f
90 %
90 %
10 %
t_PLH
10 %
50 %
50 %
t_PHL
50 %
V_CC
0V
V_CC
0V
V_OH
V_OL
• Waveform – 2
t_r
t_f
90 % 90 %
V_CC
Input CLK
50 % 50 %
50 %
10 %
10 %
t_w
t_w
0V
t_su
t_h
V_CC
Input D
50 %
50 %
0V
• Waveform – 3
t_f
t_r
Input OC
90 %
50 %
90 %
V_CC
50 %
10 %
10 %
0V
t_ZL
t_LZ
V_OH
Waveform - A
50 %
10 %
t_ZH
t_HZ
V_OL
Waveform - B
50 %
90 %
V_OH
V_OL
Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, t_r ≤ 6 ns, t_f ≤ 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 6 of 8