PI3C3125(2010) Просмотр технического описания (PDF) - Pericom Semiconductor Corporation

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PI3C3125
(Rev.:2010)

2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit, 2-Port Bus Switch with Individual Enables

Pericom Semiconductor Corporation 

PI3C3125

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

2-Port Bus Switch with Individual Enables

Switching Characteristics over 3.3V Operating Range

Parameters

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

Description

Propogation Delay(1,2)

A to B, B to A

Bus Enable Time

Bus Disable Time

Conditions

CL =50pF

RL = 500-Ohm

CL =50pF

RL = 500-Ohm

R = 500-Ohm

Com.

Min.

1.5

1.5

Max.

0.25

6.5

5.5

Units

ns

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.

Switching Characteristics over 2.5V Operating Range

Parameters

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

Description

Propogation Delay(1,2)

A to B, B to A

Bus Enable Time

Bus Disable Time

Conditions

CL =50pF

RL = 500-Ohm

CL =50pF

RL = 500-Ohm

R = 500-Ohm

Com.

Min.

1.5

1.5

Max.

0.25

9.8

8.3

Units

ns

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.

11-0003

4

PS8344A

07/22/10

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