HD74HC393_15 Datasheet, PDF (7/9 Pages) Renesas Technology Corp – Dual 4-bit Binary Counters

HD74HC393
Waveforms
• Waveform – 1
tr
tf
Clock
QA
QB
QC
QD
50%
50% 50%
50%
tw
tw
tPHL (Measure at tn+2)
tPLH (Measure at tn+1)
90%
50%
10%
90%
50%
10%
tTHL
tTLH
tPHL (Measure at tn+4)
tPLH (Measure at tn+2)
90%
50%
10%
90%
50%
10%
tTHL
tPHL (Measure at tn+8)
90%
50%
10%
tTLH
tPLH (Measure at tn+4)
90%
50%
10%
tTHL
tTLH
tPHL (Measure at tn+16)
tPLH (Measure at tn+8)
90%
50%
10%
50%
10%
90%
tTHL
tTLH
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. tn is bit time with all outputs at low.
V_CC
0V
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
• Waveform – 2
Clear
Q_A to Q_D
t_r
t_f
10 %
90 %
50 % 50 %
t_w(clear)
t_PHL
10 %
90%
50 %
10%
tTHL
V_CC
0V
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 Mar 30, 2006 page 5 of 6