RF Micro Devices Inc.

7628 Thorndike Road, Greensboro, NC 27409-9421

DS141017

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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RFFM4204

Pin Description Table

Pin

Name

Description

1

VBIAS

2

GND

Ground connection

3

GND

Ground connection

4

TX

RF Input Port for the PA. Input is matched to 50Ω and DC blocked internally.

5

GND

Ground connection

6

PA_EN

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

7

NC

No Connect. Can be connected to GND or open.

8

NC

No Connect. Can be connected to GND or open.

9

PDET

decoupling for noise decoupling.

10

RX

RF Output Port for the LNA, Input is matched to 50Ω and DC blocked internally.

11

Vdd

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

12

LNA_EN

Control Voltage for the LNA. When this pin is set “LOW” LNA bypass switch is closed.

13

C_RX

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

14

GND

Ground connection

15

ANT

RF bidirectional antenna

port matched to 50Ω and DC blocked internally.

16

GND

Ground connection

17

GND

Ground connection

18

C_TX

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

19

GND

Ground connection

20

GND

Ground connection

21

VCC3

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

22

VCC2

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

23

GND

Ground connection

24

VCC1

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

PKG Base

GND

Ground slug connection. The backside of the package should be connected directly to the reference ground

plane with as many ground vias as possible to minimize ground inductance.