ISL54220IRUEVAL1Z Intersil, ISL54220IRUEVAL1Z Datasheet

ISL54220IRUEVAL1Z

Manufacturer Part Number

ISL54220IRUEVAL1Z

Description

EVALUATION BOARD FOR ISL54220

Manufacturer

Intersil

Datasheets

1.ISL54220IRTZ.pdf (18 pages)

2.ISL54220IRUEVAL1Z.pdf (5 pages)

Specifications of ISL54220IRUEVAL1Z

Main Purpose

Interface, 2:1 Multiplexer

Embedded

Utilized Ic / Part

ISL54220

Primary Attributes

2 x SPDT Analog Switch

Secondary Attributes

2.7 V ~ 5.5 V Supply

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Description

The ISL54220IRUEVAL1Z evaluation board is designed to

provide a quick and easy method for evaluating the

ISL54220 USB Switch IC.

The ISL54220 device is a unique IC. To use this evaluation

board properly requires a thorough knowledge of the

operation of the IC. Refer to the data sheet for an

understanding of the functions and features of the device.

Studying the device’s truth-table along with its pinout

diagram is the best way to get a quick understanding of how

the part works.

A picture of the main evaluation board is shown in Figure 1.

The ISL54220 µTQFN IC is soldered onto the evaluation

board. It is located in the center of the board and is

designated as U1.

The evaluation board contains USB connectors to allow the

user to easily interface with the IC to evaluate its functions,

features, and performance. For example, with the board

properly powered and configured, as shown in Figure 2, you

can control the logic pins, SE and OE, to switch between the

two high-speed USB devices while connected to a single

USB host (computer).

In a typical application, the ISL54220 dual SPDT device is

used to select between two different USB transceiver

sections of a media player. Logic control from a µprocessor

determines which section to connect to the computer. To

change channels, the following sequence would possibly be

followed:

This application note will guide the user through the process

of configuring and using the evaluation board to evaluate the

ISL54220 device.

1. A signal would be sent to take the OE pin High, to open

2. The SEL pin would be set to select the other USB

3. The OE pin would then be taken Low to close the

all switches. The off-isolation of the ISL54220 device

would allow the present active channel to properly

disconnect from the computer.

channel.

switches to make the connection between the computer

and the other USB section of the player.

Application Note

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Evaluation Board User’s Manual

Features

• Standard USB Connectors

• Standard Banana Jacks for Power, Ground, V

• Jumpers to Allow a Device to be Powered through the

• Convenient Test Points and Connections for Test

Picture of Evaluation Board (Top View)

Logic Connections

Host Controller

Equipment

FIGURE 1. ISL54220IRUEVAL1Z EVALUATION BOARD

January 23, 2009

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

ISL54220IRUEVAL1Z

AN1449.0

BUS

and

Related parts for ISL54220IRUEVAL1Z

ISL54220IRUEVAL1Z Summary of contents

Page 1

... Application Note Description The ISL54220IRUEVAL1Z evaluation board is designed to provide a quick and easy method for evaluating the ISL54220 USB Switch IC. The ISL54220 device is a unique IC. To use this evaluation board properly requires a thorough knowledge of the operation of the IC. Refer to the data sheet for an understanding of the functions and features of the device. Studying the device’ ...

Page 2

Board Architecture/Layout Basic Layout of Evaluation Board The basic layout of the main board is as follows: Refer to Figure 1. • Power and Ground connections are at the top of the board at banana jacks (J1 and J2). • ...

Page 3

The USB switches are bi-directional, which allows the host (computer) and downstream USB device to both send and receive data. High-Speed Switches The four HSx switches (HSD1-, HSD1+, HSD2-, HSD2+) are bi-directional switches that can pass rail-to-rail signals. When powered ...

Page 4

COMPUTER SEL USB PORT USB TO HOST NOTE: DISCONNECT THE +5V POWER SUPPLY CONNECTED TO J8 AND J9 WHEN POWERING THROUGH HOST CONTROLLER BUS. FIGURE 2. BASIC EVALUATION TEST SETUP BLOCK DIAGRAM Using The Board (Refer to Figure 2) Lab ...

Page 5

... SEL Test Point TP6 V from Pin 1 of Connector J5 Test Point BUS JP1 D-/D+ Differential Probe Connection - COM Side of Switch JP2 D-/D+ Differential Probe Connection - Device 1-Side of Switch JP3 D-/D+ Differential Probe Connection - Device 2-Side of Switch ISL54220IRUEVAL1Z Board Schematic SEL J4 TP5 1 TP1 DIFF PROBE A A Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice ...

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