Disclaimer: Subject to change without notice

© 2015 RF Micro Devices, Inc.

www.rfmd.com / www.qorvo.com

9 of 9

RFFM4503

RFMD + TriQuint = Qorvo

Pin Names and Descriptions

Pin

Name

Description

1

GND

Ground connection

2

RX

RF output port for the

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

3

GND

Ground connection

4

VDD

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

NC

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 PA. Input is matched to 50Ω and DC blocked internally

9

NC

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

10

VCC

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

11

VCC

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

12

GND

Ground connection

13

ANT

RF bi-

directional antenna port matched to 50Ω. An internal DC block is integrated in device.

14

GND

Ground connection

15

CRX

Receive switch control pin. See truth table

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.