Features

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Low Cost Plastic SC-70 (SOT-363) Package

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Low Insertion Loss < 0.3 dB @ 900 MHz

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Low Power Consumption < 15

µA @ +2.3 Volts

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Positive or Negative 2.3 to 8 Volt Control

Description

M/A-COM’s SW-456 is a GaAs monolithic switch in a low

cost SC-70 (SOT-363) surface mount plastic package. The

SW-456 is ideally suited for applications where very low

power consumption, low insertion loss, very small size and

low cost are required. Typical application is in dual band

systems where switching between small signal components

is required such as filter banks, single-band LNA’s,

converters, etc. The SW-456 can be used in applications up

to 0.25 watts in systems such as cellular, PCS, DCS1800,

GSM, CDMA, W-CDMA and other analog/digital wireless

communication systems.

The SW-456 is fabricated using a mature 0.8 micron GaAs

MESFET process. The process features full passivation for

performance and reliability.

GaAs SPDT Switch

DC - 3.0 GHz

PIN 1

RF1

GND

RF2

V1

RFC

V2

1000 pF

1000 pF

1000 pF

Functional Schematic

Positive Control Voltage

RF1

PIN 1

GND

RF2

V1

RFC

V2

Functional Schematic

Negative Control Voltage

Handling Procedures

The following precautions should be observed to avoid

damage:

Static Sensitivity

Gallium Arsenide Integrated Circuits are ESD sensitive

and can be damaged by static electricity.

Proper ESD

techniques should be used when handling these devices.

Truth Table

PIN Configuration

PIN

Function

Description

1

RF1

RF In/Out

2

GND

RF Ground

3

RF2

RF In/Out

4

V2

5

RFC

RF Common

6

V1

Mode

(Control)

V1

V2

RFC -

RF1

RFC -

RF2

Positive

1

0 ± 0.2 V

+2.3 to +8 V

Off

On

+2.3 to +8 V

0 ± 0.2 V

On

Off

Negative

2

0 ± 0.2 V

-2.3 V to –8 V

On

Off

-2.3 V to -8 V

0 ± 0.2 V

Off

On

1. External DC blocking capacitors are required on all RF

ports. 1000 pF capacitors used for positive control voltage.

For higher frequency operation, smaller value DC blocking

capacitors can be substituted.

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

required on RF ports.