
Test Circuit
Input
VCC
HD74LVC04
Pulse Generator
Zout = 50 Ω
CL =
50 pF
Output
450 Ω
50 Ω Scope
Note: 1. CL includes probe and jig capacitance.
Waveforms
Input A
Output Y
10 %
tr
90 %
Vref
tPHL
Vref
tf
90 %
Vref
10 %
tPLH
Vref
VIH
GND
VOH
VOL
Notes:
TEST
VIH
Vref
VCC = 2.7 V,
3.3±0.3 V
VCC = 5.0±0.5 V
2.7 V
VCC
1.5 V
50%VCC
1. tr = 2.5 ns, tf = 2.5 ns
2. Input waveform : PRR = 10 MHz, duty cycle 50%.
5