SE2571U

2.4 GHz High Efficiency Wireless LAN/BT Front End

Preliminary

Applications

IEEE802.11b DSSS WLAN

IEEE802.11g,n OFDM WLAN

Embedded applications with Bluetooth (Mobile)

Features

Dual Mode IEEE802.11b & IEEE802.11g

Integrated PA, Harmonic Filter, LNA and BT port

Integrated Positive Slope Power Detector

20 dBm Output Power, 802.11b, 11 Mb/s, ACPR

<-30 dBc

19 dBm @ 4.0 % EVM, 802.11g, 54 Mb/s

Direct connection to battery with 3.3 V nominal

supply

Lead free, Halogen free and RoHS compliant

Compact package, 3 x 3 x 0.5 mm, MSL 1

Ordering Information

Part No.

Package

Remark

SE2571U

20 pin QFN

Samples

SE2571U-R

20 pin QFN

Tape and Reel

SE2571U-EK1

N/A

Evaluation kit

Product Description

The SE2571U is a complete 802.11 b/g/n WLAN RF

front-end module with a Bluetooth port. The device

provides all the functionality of the power amplifier,

power detector, filter, Switch, Low Noise Amplifier and

associated matching. The SE2571U provides a

complete 2.4 GHz WLAN RF solution from the output

of the transceiver to the antennas, and from the

antennas to the input of the transceiver, in an ultra

compact form factor.

The SE2571U is designed for ease of use, with all the

critical matching and harmonic filtering integrated,

also offering a simple 50 Ω interface to the antenna.

The SE2571U includes a low noise amplifier to

increase the receive sensitivity of embedded solutions

to improve range or to overcome the insertion loss of

cellular filters often included for mobile applications.

The SE2571U also includes a transmitter power

detector with 20 dB of dynamic range and a digital

enable control for transmitter power ramp on/off

control. The power ramp rise/fall time is 0.5 μs typical.

Functional Block Diagram

BT

RX

TX

ANT

DET

VCC3

VCC2

VCC1

VCC1

1

2

3

4

1

2

3

4

CBTB

CRX

CTX

CBTR

LEN PEN

Figure 1: Functional Block Diagram

DST-00172 Rev 2.1

Sept-29-2009

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