
U74AC240
TEST CIRCUIT AND WAVEFORMS
CMOS IC
VCC
3.3V±0.3V
5V±0.5V
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Inputs
VIN
tR, tF
VCC
≤2.5ns
VCC
≤2.5ns
VM
VCC/2
VCC/2
S1
Open
VLOAD
Open
VLOAD
2*VCC
2*VCC
CL
50pF
50pF
RL
500Ω
500Ω
Input
Output
Output
VM
tPLH
VM
tPHL
VM
VM
tPHL
VM
tPLH
VM
Voltage Waveforms Propagation Delay Times
VIN
0V
VOH
VOL
VOH
VOL
VΔ
0.3V
0.5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-675.A