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MC74VHCT244AN

Octal Bus Buffer/Line Driver with 3−State Outputs

ON Semiconductor 

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

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