RF Micro Devices Inc.

7628 Thorndike Road, Greensboro, NC 27409-9421

DS131106

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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RFFM8505

Pin Names and Descriptions

Pin

Name

Description

1

GND

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

2

RX

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

3

GND

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

4

VCC

Supply voltage for the LNA and PA Regulator. See applications schematic for biasing and bypassing

components.

5

PDET

Power detector voltage for the TX path. May need external series R/shunt C to adjust voltage level and to

filter RF noise.

6

PA_EN

Control voltage for the PA and TX switch. See truth table for proper settings.

7

GND

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

8

TX

RF input

port for the 802.11a/n/ac PA. Input is matched to 50Ω and DC blocked internally

9

VMODE

Applying 2.8V or greater to this pin enables low power mode.

10

VCC

Supply voltage for the first and second stage of the PA. See applications schematic for biasing and bypassing

components.

11

VCC

Supply voltage for the final stage of the PA. See applications schematic for biasing and bypassing

components.

12

GND

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

13

ANT

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

14

GND

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

15

C_RX

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

16

LNA_EN

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

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.