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MC74HC138A_05

1-of-8 Decoder/Demultiplexer with LSTTL Compatible Inputs

ON Semiconductor 

INPUT A

tPLH

OUTPUT Y

MC74HCT138A

SWITCHING WAVEFORMS

VALID

1.3 V

1.3 V

VALID

tPHL

tr

3V

INPUT CS1

2.7 V

1.3 V

0.3 V

GND

tPHL

OUTPUT Y

90%

1.3 V

10%

tTHL

Figure 1.

Figure 2.

tr

INPUT

CS2, CS3

2.7 V

1.3 V

0.3 V

tPHL

OUTPUT Y

90%

1.3 V

10%

tTHL

Figure 3.

tf

3V

GND

tPLH

tTLH

tf

3V

GND

tPLH

tTLH

TEST CIRCUIT

DEVICE

UNDER

TEST

TEST POINT

OUTPUT

CL*

*Includes all probe and jig capacitance

Figure 4.

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