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IN74ACT251

8-Input Data Selector/Multiplexer with 3-State Outputs

IK Semicon Co., Ltd 

IN74ACT251

AC ELECTRICAL CHARACTERISTICS (VCC=5.0 V ± 10%, CL=50pF, Input tr=tf=3.0 ns)

Symbol

Parameter

tPLH Propagation Delay, Input A to

Output Y or Y (Figure 3)

tPHL Propagation Delay, Input A to

Output Y or Y (Figure 3)

tPLH Propagation Delay, Input D to

Output Y or Y (Figures 1,2)

tPHL Propagation Delay, Input D to

Output Y or Y (Figures 1,2)

tPZH Propagation Delay, Output Enable to

Output Y or Y (Figure 4)

tPZL Propagation Delay, Output Enable to

Output Y or Y (Figure 4)

tPHZ Propagation Delay, Output Enable to

Output Y or Y (Figure 4)

tPLZ Propagation Delay, Output Enable to

Output Y or Y (Figure 4)

CIN Maximum Input Capacitance

Guaranteed Limits

25 °C

-40°C to 85°C Unit

Min Max Min Max

2.5 15.5 2.0 17.0

ns

2.5 16.5 2.5 18.5

ns

2.5 12.0 2.0 13.0

ns

2.5 12.5 2.5 14.0

ns

1.5 8.5 1.5 9.0

ns

1.5 8.5 1.5 9.5

ns

2.0 12.0 2.0 13.0

ns

1.5 8.5 1.5 9.0

ns

4.5

4.5

pF

CPD Power Dissipation Capacitance

Typical @25°C,VCC=5.0 V

70

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Rev. 00

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