GaAs SPDT Switch

DC - 3.0 GHz

Rev. V6

SW-438

• 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 Power Consumption, < 10 µA @ +3 V

• Low Cost Plastic SOT-363 Package

1. For best results at 2.4 GHz, use 8 pF 0402 profile SMT

capacitors on RF ports and 100 pF bypassing on pins 4

and 6.

Description

The SW-438 is a GaAs MMIC SPDT switch in a low

cost SOT-363 surface mount plastic package.

Typical

applications

include

transmit/receive

switching for Bluetooth and WLAN equipment. The

SW-438 can also be used in applications up to 500

mW in systems such as cellular, PCS, DCS1800,

GSM, CDMA and other analog and digital wireless

communications systems.

M/A-COM fabricates the SW-438 using a 0.5

micron gate length GaAs p-HEMT process.

The

process features full passivation for increased

performance and reliability.

External Component Requirements

Please note the values of the external capacitors.

The capacitors at each of the RF ports are used as

for achieving optimum insertion loss. They also

provide DC blocking for positive control. The 8 pF

(0402) capacitor is recommended for 2 - 3 GHz

operation. If this value is changed or the capacitor

placed too far from the switch, the performance will

be affected.

We also recommend 100 pF bypass

capacitors on pins 4 and 6.

For broadband applications with positive control

voltages, use DC blocking capacitors with value of

39 pF or more.

Functional Schematic

RF1

GND

RF2

V1

RFC

V2

PIN 1

C≥39pF

C≥39pF

C≥39pF

C=100pF

C=100pF

Broad Band Applications

RF1

GND

RF2

V1

RFC

V2

PIN 1

C=8pF

C=8pF

C=8pF

C=100pF

C=100pF

2.4 GHz Application

Pin Configuration

Pin No.

Function

Description

1

RF1

RF Input/Output

2

GND

RF Ground

3

RF2

RF Input/Output

4

V2

Control 2 Input

5

RFC

RF Common Port

6

V1

Control 1 Input

Ordering Information

2

Part Number

Package

SW-438TR-3000

SW-438 on 13 Inch, 3000 piece reel

SW-438SMB

SW-438 sample test board

2. Reference Application Note M513 for reel size information.

Parameter

Absolute Maximum

Input (0.5-3.0 GHz)

3 V Control

5 V Control

+30 dBm

+33 dBm

Operating Voltage

+8.5 Volts

Operating Temperature

-40°C to +85°C

Storage Temperature

-65°C to +150°C

Absolute Maximum Ratings

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