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Functional Block Diagram

RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-

mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.

Product Description

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

Ordering Information

1

2

3

8

7

6

5

4

9

10

TX_in

NC

LNA_EN

RX_Out

Vdd

BT

C_BT

ANT

C_RX

C_TX

RF5521

3.3V, SWITCH AND LNA FRONT END MODULE

The RF5521 is designed specifically for high-performance WiFi applica-

tions in the 2.4GHz to 2.5GHz ISM band, including Personal Media Play-

ers (PMPs), digital cameras, and WiFi enabled handsets.

The RF5521 integrates the LNA with bypass and an SP3T switch of a

grated input and output match reduces the number of external compo-

nents, keeping cost down and utilizing minimum layout area for

implementation. The RF5521 is provided in an ultra small

1.75 mmx1.75mmx0.5mm 10-pin QFN package. This LNA+Switch front-

end solution meets or exceeds the specification requirements of IEEE

802.11 b/g/n WiFi RF systems.

Features



Single Supply Voltage 3.0V to

4.5V



Integrated SP3T Switch and

LNA with Bypass



Typical gain is 12dB and

2.0dB NF in RX Mode Pin-to-

Pin

Applications



IEEE802.11b/g/n WiFi Appli-

cations



Portable Battery-Powered

Equipment



Combination Devices

RF5521

Standard 25 piece bag

RF5521SR

Standard 100 piece reel

RF5521TR7

Standard 2500 piece reel

RF5521PCK-410

Fully Assembled Evaluation Board

DS130715

Package Style: QFN, 10-pin, 1.75mmx1.75mmx0.5mm