MC74VHC244_11 Datasheet, PDF (5/8 Pages) ON Semiconductor – Octal Bus Buffer

MC74VHC244
SWITCHING WAVEFORMS
A or B
50%
t_PLH
YA or YB
50% V_CC
V_CC
GND
t_PHL
Figure 3. Switching Waveform
OEA or OEB
YA or YB
YA or YB
50%
t_PZL
t_PLZ
50% V_CC
t_PZH
t_PHZ
50% V_CC
V_CC
GND
HIGH
IMPEDANCE
V_OL +0.3V
V_OH -0.3V
HIGH
IMPEDANCE
Figure 4. Switching Waveform
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C_L*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 kW
C_L*
CONNECT TO V_CC WHEN
TESTING t_PLZ AND t_PZL.
CONNECT TO GND WHEN
TESTING t_PHZ AND t_PZH.
*Includes all probe and jig capacitance
Figure 5. Test Circuit
*Includes all probe and jig capacitance
Figure 6. Test Circuit
INPUT
Figure 7. Input Equivalent Circuit
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