3 Watt Cellular T/R and Antenna Changeover Switch

DC - 3.0 GHz

Rev. V5

SW-425

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.43537383

• China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and product information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

1

ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Features

• Low Cost Plastic SOT-26 Package

• Low Insertion Loss: < 0.6 dB @ 1900 MHz

• Low Power Consumption: <20µA @ +3V

• Very High Intercept Point: 53 dBm IP3

• Both Positive and Negative 2.5 to 8 V Control

• For CDMA, W-CDMA, TDMA, GSM, PCS and

DCS Applications

Description

M/A-COM’s SW-425 is a GaAs monolithic switch in a

low cost SOT-26 surface mount plastic package. The

SW-425 is ideally suited for applications where very low

pow er

co nsumption

(<10µA@5V),

lo w

intermodulation products and very small size are

required. Typical applications include Internal/External

antenna select switch for portable telephones and data

radios. In addition, because of its low loss, good

isolation and inherent speed, the SW-425 can be used

as a conventional T/R switch or as an antenna diversity

switch. The SW-425 can be used in power applications

up to 3 watts in systems such as cellular PCS, CDMA,

W-CDMA,

TDMA,

GSM

and

other

analog/digital

wireless communications systems.

The SW-425 is fabricated using M/A-COM’s 0.5 micron

gate length GaAs PHEMT process. The process

features full chip passivation for increased performance

and reliability.

Functional Diagram

6

5

4

1

2

3

Pin Configuration

Pin No.

Function

Pin No.

Function

1

RF1

4

VB

2

Ground

5

RF Common

3

RF2

6

VA

Absolute Maximum Ratings

2

Parameter

Absolute Maximum

Input Power (0.5—3.0 GHz)

3 V Control

5 V Control

+36 dBm

+38 dBm

Operating Temperature

-40°C to +85°C

Storage Temperature

-65°C to +150°C

2. Exceeding any one or combination of these limits may cause

Part Number

Package

SW-425 PIN

Bulk Packaging

SW-425TR

1000 piece reel

Ordering Information

1

1. Reference Application Note M513 for reel size information.

Mode

(Control)

Control A Control B

RFC -

RF1

RFC -

RF2

Positive

4

0 + 0.2 V

+2.5 to +8 V

+2.5 to +8 V

0 + 0.2 V

Off

On

On

Off

Negative

5

0 + 0.2 V

-2.5 to -8 V

-2.5 to -8 V

0 + 0.2 V

On

Off

Off

On

Positive/

Negative

3,4

-Vc + 0.2 V

+Vc

+Vc

-Vc + 0.2 V

Off

On

On

Off

Truth Table

3. External DC blocking capacitors are required on all RF ports.

39 pF capacitors can be used for positive control voltage.

4. [-VCTL], VCTL < 8 V

5. If negative control is used, DC blocking capacitors are not

required on RF ports.