SE2559L20

2.4 GHz High Efficiency Wireless LAN Front End

Preliminary

Applications

IEEE802.11b DSSS WLAN

IEEE802.11g OFDM WLAN

Access Points, PCMCIA, PC cards

Features

Dual Mode IEEE802.11b & IEEE802.11g

Integrated PA, TX Filter, DPDT T/R and Diversity

switches

Integrated Negative Slope Power Detector

21 dBm Output Power, 802.11b, 11 Mbits, ACPR

<-30 dBc

18 dBm @ 3.0 % EVM, 802.11g, 54 Mbits

Single supply voltage: 3.3 V ± 10 %

Lead free, halogen free and RoHS compliant

Small lead free, plated package, 4 mm x 5 mm x

0.9 mm, MSL 1

Ordering Information

Part No.

Package

Remark

SE2559L20

22 pin QFN

Samples

SE2559L20-R

22 pin QFN

Tape & Reel

SE2559L20-EK1

N/A

Evaluation kit

Product Description

The SE2559L20 is a complete 802.11 b/g WLAN RF

front-end module providing all the functionality of the

power amplifier, power detector, T/R switch, diversity

switch and associated matching. The SE2559L20

provides a complete 2.4 GHz WLAN RF solution from

the output of the transceiver to the antennas in an

ultra compact form factor.

The SE2559L20 is designed for ease of use, with all

the critical matching and harmonic filtering integrated,

offering a simple 50 Ω interface to the antenna. The

SE2559L20 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.

The device also provides a 3.2–3.3 GHz notch filter

prior to the input of the power amplifier.

Functional Block Diagram

Bias Circuitry

Power

Detector

ANT_B

C1

PD_OUT

TXEN

50 Ohm

Match

Switch

Control

C3

C2

C4

50 Ohm

Match

50 Ohm

Match

50 Ohm

Match

Filter

ANT_A

OMN

LPF

Figure 1: Functional Block Diagram

DST-00057 Rev 1.9 May-26-2009

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