74HCT245DTR2G Datasheet, PDF (5/8 Pages) ON Semiconductor – Octal 3-State Noninverting Bus Transceiver with LSTTL-Compatible Inputs

74HCT245
A or B
t_PLH
B or A
1.5V
1.5V
3V
GND
t_PHL
V_OH
V_OL
Figure 3. Switching Waveform
DIR
OE
A or B
A or B
3V
1.5V
GND
3V
1.5V
t_PZL
t_PLZ
1.5V
t_PZH
t_PHZ
1.5V
1.5V
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*
*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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