MC74HC139A_12 Datasheet, PDF (5/10 Pages) ON Semiconductor – Dual 1-of-4 Decoder/ Demultiplexer

MC74HC139A
t_f
90%
50%
SELECT _10%
OUTPUT Y
t_THL
t_PHL
90%
50%
10%
t_r
t_PLH
V_CC
GND
t_TLH
Figure 3. Switching Waveform
INPUT A
t_PLH
OUTPUT Y
VALID
50%
50%
VALID
t_PHL
Figure 4. Switching Waveform
V_CC
GND
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
C_L*
* Includes all probe and jig capacitance
Figure 5. Test Circuit
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