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RF5540

DS130128

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

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

Pin Out

Switch Logic Truth Table:

Pin

Function

Description

1GND

Ground.

2ANT

This is the common port (antenna). Matched to 50

. External DC blocking capacitor required.

3GND

Ground.

4

LNA_EN

LNA Enable/Bypass Enable control pin. See switch truth table for proper settings.

5GND

Ground.

6VDD

Supply voltage to the LNA.

7NC

No Board Connection Allowed.

8RX_OUT

Receive port for 802.11a/n band. RX output includes integrated DC-block and 50

 match.

9NC

No Board Connection Allowed.

10

GND

Ground.

11

TX_IN

Transmit port for 802.11a/n band. Matched to 50

. External DC blocking capacitor required.

12

C_TX/RX

Transmit and receive mode control pin. See switch truth table for proper settings.

Mode

C_TX/RX LNA_EN

RX Gain

L

H

RX Bypass

L

L

TX

H

L

1

2

3

9

8

7

6

5

4

12

GND

NC

RX_Out

ANT

10

11

GND

NC