IN74HCT244A Просмотр технического описания (PDF) - Integral Corp.

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IN74HCT244A

Octal 3-State Noninverting Buffer/Line Driver/Line Receiver

Integral Corp. 

IN74HCT244A

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

Symbol

Parameter

tPLH, tPHL

tPLZ, tPHZ

tPZL, tPZH

tTLH, tTHL

CIN

COUT

Maximum Propagation Delay, A to YA or B to

YB (Figures 1 and 3)

Maximum Propagation Delay , Output Enable to

YA or YB (Figures 2 and 4)

Maximum Propagation Delay , Output Enable to

YA or YB (Figures 2 and 4)

Maximum Output Transition Time, Any Output

(Figures 1 and 3)

Maximum Input Capacitance

Maximum Three-State Output Capacitance

(Output in High-Impedance State)

Guaranteed Limit

25 °C

to

-55°C

≤85°C ≤125°C Unit

20

25

30

ns

26

33

39

ns

22

28

33

ns

12

15

18

ns

10

10

10

pF

15

15

15

pF

Power Dissipation Capacitance (Per Enabled

Output)

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

Figure 3. Test Circuit

Figure 4. Test Circuit

299

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