IDQS34X245 datasheet(4/5 Pages) IDT

Nome de Peças	IDQS34X245

Descrição Electrónicos	QUICKSWITCH-R PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH-TM BUS SWITCHES

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Fabricante Electrônico	IDT [Integrated Device Technology]

Página de início	http://www.idt.com

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INDUSTRIALTEMPERATURERANGE

IDTQS34X245

HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES

POWER SUPPLY CHARACTERISTICS

Symbol

Parameter

TestConditions(1)

Max.

Unit

ICCQ

Quiescent Power Supply Current

VCC = Max., VIN = GND or Vcc, f = 0

12

µA

∆ICC

Power Supply Current per Control Input HIGH (2)

VCC = Max., VIN = 3.4V, f = 0

1.5

mA

ICCD

Dynamic Power Supply Current per MHz(3)

VCC = Max., A and B pins open

0.25

mA/MHz

Control Inputs Toggling at 50% Duty Cycle

NOTES:

1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.

2. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to

∆Icc.

3. This current applies to the control inputs only and represents 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 guaranteed but not production tested.

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

TA = -40°C to +85°C, VCC = 5.0V ± 5%;

CLOAD = 50pF, RLOAD = 500

Ω unless otherwise noted.

Symbol

Parameter

Min.(1)

Typ.

Max.

Unit

tPLH

DataPropagationDelay(1,2)

—

0.25

ns

tPHL

An to/from Bn

tPZL

SwitchTurn-onDelay

0.5

—

5.6

ns

tPZH

OE to An/Bn

tPLZ

SwitchTurn-offDelay(1)

0.5

—

5.2

ns

tPHZ

OE to An/Bn

NOTES:

1.

Minimums are guaranteed but not production tested.

2. The bus switch contributes no propagation 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 CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to

the system. Propagation 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.

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