PI3C3126(2009) Ver la hoja de datos (PDF) - Pericom Semiconductor

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PI3C3126
(Rev.:2009)

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

Pericom Semiconductor 

PI3C3126

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 = 500Ω

CL =50pF

RL = 500Ω

R = 500Ω

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 = 500Ω

CL =50pF

RL = 500Ω

R = 500Ω

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.

09-0072

4

PS9087

10/29/09

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