HD74HC108 Datasheet, PDF (5/7 Pages) Hitachi Semiconductor – Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock)

HD74HC108
Waveforms
• Waveform − 1
t_r
t_f
90 %
t_{w (L)}
V_CC
Clock
50 % 50 %
50 % 50 %
10 %
t_{w (H)}
10 %
0V
t_TLH
t_THL
Q or Q
Q or Q
t_PLH
90 %
50 %
10 %
t_PHL
50 %
10 %
t_THL
90 %
50 %
t_PHL
t_PLH
50 %
10 %
10 %
90 %
t_TLH
V_OH
V_OL
V_OH
V_OL
• Waveform − 2
Clear
Preset
Q
Q
t_f
t_r
90 %
90 %
50 %
10 %
50 %
10 %
t_w(clear)
t_f
t_r
t_PHL
90 %
50 %
10 %
t_THL
t_PLH
50 %
10 %
90 %
90 %
50 %
10 %
t_w(preset)
t_PLH
90 %
50 %
50 %
t_PHL
50 %
t_TLH
V_CC
0V
V_CC
0V
V_OH
V_OL
V_OH
V_OL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Rev.2.00, Oct 11, 2005 page 5 of 6