HD74HC21_15 Datasheet, PDF (6/9 Pages) Renesas Technology Corp – Dual 4-input AND Gates

HD74HC21
Test Circuit
Measurement point
C_L*
Note: C_L includes the probe and fig capacitance.
Waveforms
• Waveform − 1
t_r
t_f
90%
90%
V_CC
Input
50%
50%
10%
10%
0V
t_PLH
t_PHL
Output
50%
10%
90%
90%
V_OH
50%
10%
V_OL
t_TLH
t_THL
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 06, 2005 page 4 of 6