RF Micro Devices Inc.

7628 Thorndike Road, Greensboro, NC 27409-9421

DS150128

For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.

The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of

third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended

application circuitry and specifications at any time without prior notice.

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RFFM8550

Pin Names and Descriptions

Pin

Name

Description

1

ANT

RF bidirectional antenna port matched to 50Ω. An external DC block is required.

2

VRX

Receive switch control pin. See switch truth table for proper voltage level.

3

VTX

Control voltage for the TX switch. See truth table for proper voltage level.

4

VDD

Supply voltage for the LNA. See applications schematic for bypassing components.

5

LNAEN

Control voltage for the LNA. When this pin is set to a LOW logic state, the bypass mode is enabled.

6

RX

RF output port for the 802.11a/n/ac LNA. This port is matched to 50Ω and DC blocked internally

7

N/C

This pin is not connected internally and can be left floating or connected to ground.

8

TX

RF input port for the TX throw of the T/R switch. An external DC block is required

Pkg Base

GND

Ground connection. The backside of the package should be connected to the ground plane through a short

path, i.e., PCB vias under the device are recommended.