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IN74AC643

Octal 3-State Bus Transceiver High-Speed Silicon-Gate CMOS

Integral Corp. 

IN74AC643

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, A to B or B to A

(Figure 1)

3.3 1.5 8.5 1.0 9.5 ns

5.0 1.5 6.5 1.0 7.5

tPHL Propagation Delay, A to B or B to A

(Figure 1)

3.3 1.5 8.5 1.0 9.5 ns

5.0 1.5 6.5 1.0 7.5

tPZH Propagation Delay, Direction or Output

Enable to A or B (Figure 2)

3.3 2.5 12.5 2.0 13.5 ns

5.0 1.5 9.5 1.0 10.0

tPZL Propagation Delay, Direction or Output

Enable to A or B (Figure 2)

3.3 2.5 12.5 2.0 13.5 ns

5.0 1.5 9.5 1.0 10.0

tPHZ Propagation Delay, Direction or Output

Enable to A or B (Figure 2)

3.3 2.0 12.0 1.0 12.5 ns

5.0 1.5 9.0 1.0 10.0

tPLZ Propagation Delay, Direction or Output

Enable to A or B (Figure 2)

3.3 2.0 12.0 1.5 13.5 ns

5.0 1.5 9.5 1.0 10.5

CIN

COUT

Maximum Input Capacitance

Maximum Tree-State I/O Capacitance

(Output in High-Impedance State0

5.0

4.5

5.0

15

4.5

pF

15

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

45

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

509

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