IN74HC139A 查看數據表（PDF） - Integral Corp.

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IN74HC139A

Dual 1-of-4 Decoder/Demultiplexer

Integral Corp. 

IN74HC139A

AC ELECTRICAL CHARACTERISTICS(CL=50pF,Input tr=tf=6.0 ns)

Symbol

Parameter

tPLH, tPHL Maximum Propagation Delay, Select to OutputY

(Figures 1 and 3)

tPLH, tPHL Maximum Propagation Delay , Input A to

OutputY (Figures 2 and 3)

tTLH, tTHL Maximum Output Transition Time, Any Output

(Figures 1 and 3)

CIN Maximum Input Capacitance

VCC

Guaranteed Limit

V 25 °C ≤85°C ≤125°C Unit

to

-55°C

2.0 115

145

175

ns

4.5 23

29

35

6.0 20

25

30

2.0 115

145

175

ns

4.5 23

29

35

6.0 20

25

30

2.0 75

4.5 15

6.0 13

95

110

ns

19

22

16

19

-

10

10

10

pF

Power Dissipation Capacitance (Per Decoder)

CPD Used to determine the no-load dynamic power

consumption:

PD=CPDVCC2f+ICCVCC

Typical @25°C,VCC=5.0 V

55

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

154

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