SL74HCT157 查看數據表（PDF） - System Logic Semiconductor

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SL74HCT157

Quad 2-Input Data Selectors/Multiplexer

System Logic Semiconductor 

SL74HCT157

AC ELECTRICAL CHARACTERISTICS(VCC =5.0 V ± 10%, CL=50pF,Input tr=tf=6.0 ns)

Symbol

Parameter

tPLH, tPHL

tPLH, tPHL

tPLH, tPHL

tTLH, tTHL

CIN

Maximum Propagation Delay, Input A or B to

Output Y (Figures 1and 4)

Maximum Propagation Delay , Select to

Output Y (Figures 2 and 4)

Maximum Propagation Delay , Output Enable to

Output Y (Figures 3 and 4)

Maximum Output Transition Time, Any Output

(Figures 1 and 4)

Maximum Input Capacitance

Guaranteed Limit

25 °C to ≤85°C ≤125°C Unit

-55°C

27

34

41

ns

37

46

56

ns

30

38

45

ns

15

19

22

ns

10

10

10

pF

Power Dissipation Capacitance (Per Transceiver

Channel)

CPD Used to determine the no-load dynamic power

consumption:

PD=CPDVCC2f+ICCVCC

Typical @25°C,VCC=5.0 V

64

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Figure 3. Switching Waveforms

Figure 4. Test Circuit

SLS

System Logic

Semiconductor

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