© 2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FST3125 • Rev. 1.0.3

4

DC Electrical Characteristics

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Clamp Diode Voltage

4.5

-1.2

V

High-Level Input Voltage

4.0 to 5.5

2.0

V

Low-Level Input Voltage

4.0 to 5.5

0.8

V

Input Leakage Current

0

≤ V

5.5

±1.0

µA

Off-state Leakage

Current

0

≤ A, B ≤ V

CC

5.5

±1.0

µA

4.5

4

7

4.5

4

7

4.5

8

15

Switch On Resistance

(3)

4.0

11

20

Ω

Quiescent Supply Current

5.5

3

µA

ΔI

CC

One Input at 3.4V, Other

5.5

2.5

mA

Note:

3.

Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance

is determined by the lower of the voltages on the A or B pins.

AC Electrical Characteristics

Symbol

Parameter

Conditions

Min.

Max.

Min.

Max.

Units

Figure

Propagation Delay

Bus-to-Bus

(4)

0.25

0.25

ns

Figure 4

Figure 5

Output Enable Time

1.0

5.0

5.5

ns

Figure 4

Figure 5

Output Disable Time

1.5

5.3

5.6

ns

Figure 4

Figure 5

Note:

4.

This parameter is guaranteed by design, but is not tested. The bus switch contributes no propagation delay

other than the RC delay of the typical on resistance of the switch and the 50pF load capacitance when driven by

an ideal voltage source (zero output impedance).

Capacitance

Symbol

Parameter

Conditions

Typ.

Units

Control Pin Input Capacitance

3

pF

Input/Output Capacitance

2

pF