IN74LS138D 查看數據表（PDF） - IK Semicon Co., Ltd

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IN74LS138D

3-to-8-Line Decoder/Demultiplexer

IK Semicon Co., Ltd 

IN74LS138

AC ELECTRICAL CHARACTERISTICS (TA=25°C, VCC = 5.0 V, CL = 15 pF, RL = 2 kΩ, tr =15

ns, tf = 6.0 ns)

Symbol

Parameter

Level

Min

Max

Unit

tPLH Maximum Propagation Delay, Input A to

Output Y

2

20

ns

tPHL Maximum Propagation Delay, Input A to

Output Y

41

ns

tPLH Maximum Propagation Delay, Input A to

Output Y

3

27

ns

tPHL Maximum Propagation Delay, Input A to

Output Y

39

ns

tPLH Maximum Propagation Delay , CS1 to

Output Y

3

26

ns

tPHL Maximum Propagation Delay , CS1 to

Output Y

38

ns

tPLH Maximum Output Transition Time , CS2 or

CS3 to Output Y

2

18

ns

tPHL Maximum Output Transition Time , CS2 or

CS3 to Output Y

32

ns

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Figure 3. Switching Waveforms

NOTES A. CL includes probe and jig capacitance.

B. All diodes are 1N916 or 1N3064.

Figure 4. Test Circuit

Rev. 00

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