MC74VHCT244A Datasheet, PDF (4/6 Pages) ON Semiconductor – Octal Bus Buffer/Line Driver with 3-State Outputs

MC74VHCT244A
A or B
tPLH
YA or YB
1.5V
1.5V
Figure 1.
SWITCHING WAVEFORMS
3V
GND
tPHL
VOH
VOL
OEA or OEB
YA or YB
YA or YB
1.5V
tPZL tPLZ
1.5V
tPZH tPHZ
1.5V
Figure 2.
3V
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH –0.3V
HIGH
IMPEDANCE
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 kΩ
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
* Includes all probe and jig capacitance
Figure 3. Test Circuit
* Includes all probe and jig capacitance
Figure 4. Test Circuit
MOTOROLA
4
VHC Data – Advanced CMOS Logic
DL203 — Rev 1