IDT74FST3257Q Integrated Device Technology, Inc., IDT74FST3257Q Datasheet

IDT74FST3257Q

Manufacturer Part Number

IDT74FST3257Q

Description

QUAD 2:1 MUX/DEMUX BUS SWITCH

Manufacturer

Integrated Device Technology, Inc.

Datasheet

1.IDT74FST3257Q.pdf (5 pages)

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H&T Electronics

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FEATURES:

• Bus switches provide zero delay paths

• Extended commercial range of –40 C to +85 C

• Low switch on-resistance:

• TTL-compatible input and output levels

• ESD > 2000V per MIL-STD-883, Method 3015;

• Available in QSOP and SOIC

DESCRIPTION:

switch devices perform the function of connecting or isolating

two ports without providing any inherent current sink or source

FUNCTIONAL BLOCK DIAGRAM

PIN DESCRIPTION

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

COMMERCIAL TEMPERATURE RANGES

1996 Integrated Device Technology, Inc.

FST3xxx – 5

> 200V using machine model (C = 200pF, R = 0)

Integrated Device Technology, Inc.

The FST3257 belongs to IDT's family of Bus switches. Bus

Pin Names

0A-

1A-

0B-D

1B-D

A-

I/O

Port 0

Port 1

Switch Enable (Active Low)

Mux Select

Port Z

3 Channels

Description

QUAD 2:1 MUX/DEMUX

BUS SWITCH

B-D

3257 drw 01

3257 tbl 01

10.3

capability. Thus they generate little or no noise of their own

while providing a low resistance path for an external driver.

These devices connect input and output ports through an n-

channel FET. When the gate-to-source junction of this FET is

adequately forward-biased the device conducts or the resis-

tance between input and output ports is small. Without

adequate bias on the gate-to-source junction of the FET, the

FET is turned off, therefore with no V

has hot insertion capability.

between input and output ports reduces the delay in this path

to close to zero.

The S pin controls the mux select and the

switch enable.

PIN CONFIGURATION

The low on-resistance and simplicity of the connection

The FST3257 provides a 4-bit 2:1 multiplexer/demultiplexer.

GND

SOIC/QSOP

TOP VIEW

SO16-1

SO16-7

PRELIMINARY

IDT74FST3257

applied, the device

pin serves as the

AUGUST 1996

Vcc

3257 drw 02

DSC-3257/3

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IDT74FST3257Q Summary of contents

Page 1

... Z Z I/O Port The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGES 1996 Integrated Device Technology, Inc. QUAD 2:1 MUX/DEMUX BUS SWITCH capability. Thus they generate little or no noise of their own while providing a low resistance path for an external driver. ...

Page 2

IDT74FST3257 QUAD 2:1 MUX/DEMUX BUS SWITCH ABSOLUTE MAXIMUM RATINGS Symbol Description TERM (2) V Terminal Voltage with Respect to GND T Storage Temperature STG I Maximum Continuous Channel OUT Current NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM ...

Page 3

IDT54/74FST3257 QUAD 2:1 MUX/DEMUX BUS SWITCH POWER SUPPLY CHARACTERISTICS Symbol Parameter I Quiescent Power Supply Current CC TTL Inputs HIGH I Dynamic Power Supply CCD (4) Current I Total Power Supply Current C NOTES: 1. For conditions shown as Max. ...

Page 4

IDT74FST3257 QUAD 2:1 MUX/DEMUX BUS SWITCH TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS Pulse D.U.T. Generator R T SET-UP, HOLD AND RELEASE TIMES DATA INPUT t SU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ...

Page 5

IDT54/74FST3257 QUAD 2:1 MUX/DEMUX BUS SWITCH ORDERING INFORMATION IDT XX FST XX Temp. Range Device Type X Package SO Small Outline IC (SO16-1) Q Quarter-size Small Outline Package (SO16-7) Quad 2:1 Mux/Demux Bus Switch 3257 74 – +85 ...

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