HD74HC4518 Datasheet, PDF (6/9 Pages) Hitachi Semiconductor – Dual BCD Use Converters/Dual Binary Up Converters

HD74HC4518, HD74HC4520
Waveforms
• Waveform – 1
tr
Reset
10%
90%
50%
tf
90%
50%
10%
Clock
Qn
tw
tPHL
90%
50%
10%
tTHL
trem
10%
90%
50%
tTLH
90%
10%
tTHL
10%
90%
tTLH
V_CC
0V
V_OH
V_OL
V_OH
V_OL
Note: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
• Waveform – 2
Clock
Qn
tr
tf
50% 50%
tw
tPLH
50%
10%
90%
tTLH
50%
tPHL
90%
50%
10%
tTHL
V_CC
0V
VOH
VOL
Note: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
• Waveform – 3
Enable
Qn
tf
tr
90%
50%
10% 10%
tw
tPLH
90%
50%
50%
10%
90%
tTLH
50%
tPHL
90%
50%
10%
tTHL
V_CC
0V
V_OH
V_OL
Note: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
Rev.2.00, Mar 30, 2006 page 6 of 8