www.fairchildsemi.com

4

AC Electrical Characteristics

Note 6: This parameter is guaranteed. The bus switch contributes no propagation delay other than the RC delay of the typical On Resistance of the switch and the 50 pF load

capacitance, when driven by an ideal voltage source (zero output impedance). The specified limit is calculated on this basis.

Capacitance

AC Loading and Waveforms

Input driven by 50

: source terminated in 50:

Input PRR

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

Symbol

Parameter

Units

Conditions

Figure

(V)

Min

Typ

Max

Number

Propagation Delay Bus-to-Bus

4.5 to 5.5

0.25

ns

Figures

1, 2

(Note 6)

Output Enable Time

4.5 to 5.5

1.0

3.5

5.8

ns

Figures

1, 2

Output Disable Time

4.5 to 5.5

0.8

3.0

4.8

ns

Figures

1Figure 2

Symbol

Parameter

Typ

Max

Units

Conditions

Control Pin Input Capacitance

2.5

pF

Port OFF Capacitance

6.0

pF

Port ON Capacitance

12.0

pF