4

PI3C3125/PI3C3126

2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit,

2-Port Bus Switch with Individual Enables

PS8153H

10/25/07

PI3C3125/PI3C3126 Switching Characteristics over 3.3V Operating Range

Parameters Description

Conditions

PI3C3125/PI3C3126

Units

Com.

Min.

Max.

A to B, B to A

0.25

ns

Bus Enable Time

R = 500Ω

1.5

6.5

Bus Disable Time

1.5

5.5

Notes:

1. This parameter is guaranteed but not tested on Propagation Delays.

2. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load

capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller

than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus

switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load

on the driven side.

PI3C3125/PI3C3126 Switching Characteristics over 2.5V Operating Range

Parameters Description

Conditions

PI3C3125/PI3C3126

Units

Com.

Min.

Max.

A to B, B to A

0.25

ns

Bus Enable Time

R = 500Ω

1.5

9.8

Bus Disable Time

1.5

8.3

Notes:

1. This parameter is guaranteed but not tested on Propagation Delays.

2. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance.

The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the

rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch

when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the

driven side.

07-0240