MC74VHCT240AML1 查看數據表（PDF） - ON Semiconductor

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MC74VHCT240AML1

Octal Bus Buffer/Line Driver Inverting with 3-State Outputs

ON Semiconductor 

MC74VHCT240A

A or B

tPHL

YA or YB

1.5V

1.5V

3V

GND

tPLH

VOH

VOL

Figure 3. Switching Waveform

OEA or OEB

YA or YB

YA or YB

1.5V

tPZL

tPLZ

1.5V

tPZH

tPHZ

1.5V

3V

GND

HIGH

IMPEDANCE

VOL +0.3V

VOH -0.3V

HIGH

IMPEDANCE

Figure 4. Switching Waveform

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

*Includes all probe and jig capacitance

Figure 5. Test Circuit

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 6. Test Circuit

INPUT

Figure 7. Input Equivalent Circuit

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