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MC74LCX139 Datasheet, PDF (5/8 Pages) ON Semiconductor – Dual Low-Voltage CMOS 2-to-4 Decoder/Demultiplexer
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A
tPLH
Y
50%
50% VCC
MC74LCX139
VCC
GND
tPHL
E
50%
Y
tPHL
50% VCC
VCC
GND
tPLH
Figure 5. Waveform 1 Prop Delays
Figure 6. Waveform 2 Output Enable
PULSE
GENERATOR
VCC
DUT
RT
CL
RL
CL = 50 pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500 W or equivalent
RT = ZOUT of pulse generator (typically 50 W)
Figure 7. Test Circuit
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