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IN74AC257

Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS

IK Semicon Co., Ltd 

IN74AC257

AC ELECTRICAL CHARACTERISTICS (CL=50pF, Input tr=tf=3.0 ns)

Symbol

Parameter

VCC*

Guaranteed Limits

V

25 °C

-40°C to Unit

85°C

Min Max Min Max

tPLH Propagation Delay, Nibble A or B to

Output Y (Figure 1)

3.3 1.5 8.5 1.0 9.0 ns

5.0 1.5 6.0 1.0 7.0

tPHL Propagation Delay, Nibble A or B to

Output Y (Figure 1)

3.3 1.5 8.5 1.0 9.0 ns

5.0 1.5 6.0 1.0 7.0

tPLH Propagation Delay, Select to Output Y (Figure 3.3 1.5 10.5 1.5 11.5 ns

2)

5.0 1.5 7.5 1.0 8.5

tPHL Propagation Delay, Select to Output Y (Figure 3.3 1.5 10.5 1.5 11.5 ns

2)

5.0 1.5 7.5 1.0 8.5

tPZH Propagation Delay, Output Enable to

Output Y (Figure 3)

3.3 1.5 9.5 1.0 10.5 ns

5.0 1.5 7.5 1.0 8.5

tPZL Propagation Delay, Output Enable to

Output Y (Figure 3)

3.3 1.5 9.0 1.0 10.0 ns

5.0 1.5 8.5 1.0 9.5

tPHZ Propagation Delay, Output Enable to

Output Y (Figure 3)

3.3 1.5 10.0 1.0 11.0 ns

5.0 1.5 9.0 1.0 10.0

tPLZ Propagation Delay, Output Enable to

Output Y (Figure 3)

3.3 1.5 9.0 1.0 10.0 ns

5.0 1.5 8.0 1.0 9.0

CIN Maximum Input Capacitance

5.0

4.5

4.5

pF

CPD Power Dissipation Capacitance

*Voltage Range 3.3 V is 3.3 V ±0.3 V

Voltage Range 5.0 V is 5.0 V ±0.5 V

Typical @25°C,VCC=5.0 V

50

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Rev. 00

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