HD74HC14
Test Circuit
Measurement point
*
C L
Note: CL includes the probe and fig capacitance.
Waveforms
• Waveform − 1
tr
tf
VCC
0 V
90%
50%
90%
50%
Input
10%
10%
tPHL
tPLH
VOH
Output
50%
50%
VOL
tTHL
tTLH
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Rev.2.00, Oct 06, 2005 page 4 of 6