MC74VHC240(2001) 查看數據表（PDF） - ON Semiconductor

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MC74VHC240
(Rev.:2001)

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

ON Semiconductor 

A or B

50%

tPHL

YA or YB

50% VCC

Figure 2.

MC74VHC240

SWITCHING WAVEFORMS

VCC

GND

tPLH

OEA or OEB

YA or YB

YA or YB

50%

tPZL

tPLZ

50% VCC

tPZH

tPHZ

50% VCC

Figure 3.

VCC

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 4. Test Circuit

*Includes all probe and jig capacitance

Figure 5. Test Circuit

INPUT

Figure 6. Input Equivalent Circuit

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