MC74VHC244 데이터 시트보기 (PDF) - ON Semiconductor

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MC74VHC244

Octal Bus Buffer

ON Semiconductor 

MC74VHC244

SWITCHING WAVEFORMS

A or B

50%

tPLH

YA or YB

50% VCC

VCC

GND

tPHL

Figure 3. Switching Waveform

OEA or OEB

YA or YB

YA or YB

50%

tPZL

tPLZ

50% VCC

tPZH

tPHZ

50% VCC

VCC

GND

HIGH

IMPEDANCE

VOL +0.3V

VOH -0.3V

HIGH

IMPEDANCE

Figure 4. Switching Waveform

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

TEST CIRCUITS

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

1 kW

CL*

CONNECT TO VCC WHEN

TESTING tPLZ AND tPZL.

CONNECT TO GND WHEN

TESTING tPHZ AND tPZH.

*Includes all probe and jig capacitance

Figure 5. Test Circuit

*Includes all probe and jig capacitance

Figure 6. Test Circuit

INPUT

Figure 7. Input Equivalent Circuit

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