MC74HC245A 데이터 시트보기 (PDF) - ON Semiconductor

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MC74HC245A

Octal 3−State Noninverting Bus Transceiver

ON Semiconductor 

MC74HC245A

tr

INPUT

A OR B

tPLH

OUTPUT

B OR A

90%

50%

10%

90%

50%

10%

tTLH

DIRECTION

tf

VCC

GND

tPHL

OUTPUT

ENABLE

A OR B

tTHL

A OR B

Figure 3. Switching Waveform

50%

tPZL tPLZ

50%

tPZH tPHZ

50%

50%

VCC

GND

VCC

10%

90%

GND

HIGH

IMPEDANCE

VOL

VOH

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 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 6. Test Circuit

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