MC74HCT245A_07 Datasheet, PDF (4/9 Pages) ON Semiconductor – Octal 3−State Noninverting Bus Transceiver with LSTTL Compatible Inputs

MC74HCT245A
SWITCHING WAVEFORMS
t_r
INPUT
A OR B
t_PLH
OUTPUT
B OR A
2.7 V
1.3 V
0.3 V
90%
1.3 V
10%
t_TLH
Figure 2.
t_f
3.0 V
GND
t_PHL
t_THL
DIRECTION
OUTPUT
ENABLE
A OR B
A OR B
1.3 V
1.3 V
t_PZL
t_PLZ
1.3 V
t_PZH t_PHZ
1.3 V
3.0 V
1.3 V
GND
3.0 V
GND
HIGH
IMPEDANCE
10% V_OL
90% VOH
HIGH
IMPEDANCE
Figure 3.
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C_L*
*Includes all probe and jig capacitance
Figure 4.
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
http://onsemi.com
4