MC74HC245A_06 Datasheet, PDF (5/9 Pages) ON Semiconductor – Octal 3−State Noninverting Bus Transceiver High−Performance Silicon−Gate CMOS

MC74HC245A
t_r
INPUT
A OR B
t_PLH
OUTPUT
B OR A
90%
50%
10%
90%
50%
10%
t_TLH
DIRECTION
t_f
V_CC
GND
t_PHL
OUTPUT
ENABLE
A OR B
t_THL
A OR B
Figure 3. Switching Waveform
50%
t_PZL t_PLZ
50%
t_PZH t_PHZ
50%
50%
V_CC
GND
V_CC
10%
90%
GND
HIGH
IMPEDANCE
V_OL
V_OH
HIGH
IMPEDANCE
Figure 4. Switching Waveform
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C_L*
*Includes all probe and jig capacitance
Figure 5. Test Circuit
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 6. Test Circuit
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