PI5C34X245 데이터 시트보기 (PDF) - Pericom Semiconductor Corporation

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PI5C34X245

32-Bit, 2-Port Bus Switch

Pericom Semiconductor Corporation 

PI5C34X245

32-Bit, 2-Port Bus Switch

Capacitance (TA = 25°C, f = 1 MHz)

Paramaters(1)

Description

Test Conditions

CIN

Input Capacitance

COFF

A/B Capacitance, Switch OFF

VIN = 0V

CON

A/B Capacitance, Switch ON

Notes:

1. This parameter is determined by device characterization but is not production tested.

Max.

6

6

12

Units

pF

Power Supply Characteristics

Parameters

Description

ICC

Quiescent Power Supply Current

∆ICC

Supply Current per Input @ TTL

HIGH

ICCD

Supply Current per Input per MHz(4)

Test Conditions(1)

VCC = Max.

VIN = GND

or VCC

VCC = Max.

VIN = 3.4V(3)

VCC = Max.,

A & B Pins Open

Control Input Toggling

50% Duty Cycle

Min. Typ(2) Max. Units

0.1 3.0 µA

2.5 mA

0.25

mA/

MHz

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at VCC = 5.0V, +25°C ambient.

3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to ICC.

4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The

A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.

Switching Characteristics over Operating Range

PI5C34X245

Parameter

Description

Conditions

Com.

Units

tPLH

Propagation Delay(1,2)

tPHL

Ax to Bx, Bx to Ax

tPZH

tPZL

Bus Enable Time BEx to Ax or Bx

tPHZ

tPLZ

Bus Disable Time BEx to Ax or Bx

CL = 50pF

RL = 500Ω

Min.

Max.

0.25

1.5

5.6

ns

1.5

5.2

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.

06-0238

3

PS7058H

05/12/06

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