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Front-end modules get smart phones Wi-Fi-connected

Posted: 14 Apr 2010 ?? ?Print Version ?Bookmark and Share

Keywords:front-end module? amplifier? Wi-Fi? smart phone?

802.11b/g/n front-end modules

Expanding its family of WLAN power amplifier (PA) solutions, Microsemi Corp. has introduced its first amplifier products for the smart phone market. The highly-integrated LX5553 802.11b/g/n front-end module (FEM) supports Wi-Fi functionality in space-constrained smart phones and other data-enabled cellular handset designs.

Microsemi's LX5553 FEM combines a 2.4GHz WLAN power amplifier module, LNA and single-pole triple-throw (SP3T) switch into a compact, 3mm x 3mm package that takes up significantly less space than solutions that use three discrete components for these functions. The FEM is suitable for integrating 802.11b/g/n functionality into compact and power-efficient smart phones as well as other 2.4GHz applications. The device integrates an advanced PA with on-chip impedance matching, a fully-matched LNA and a SP3T switch that enables the LX5553 to share a single antenna between WLAN and Bluetooth systems, eliminating the need for an additional antenna.

"The smart phone market is a natural for Microsemi, as one of the leading suppliers of high performance power amplifiers for the WLAN marketplace," said Kang Hee Kim, RF product line manager with Microsemi's analog mixed signal group. "We have taken the proven performance of our WLAN solutions for access points, home gateways and other products, and packaged it into a solution that handset manufacturers, WLAN baseband partners and ODMs can use to create compact, power-efficient smart phone designs. Customers can implement the LX5553 either in modules or directly into the handset as part of a discrete design."

For customers who do not need an LNA, Microsemi also offers the LX5543, which combines a power amplifier module and SP3T switch in a 3mm x 3mm package at a lower cost.

The LX5553 and LX5543 join Microsemi's broad portfolio of IEEE 802.11a/b/g/n WLAN, 802.16e WiMAX and WiBro power amplifiers, which are used in a variety of applications including wireless access points and half mini-cards for notebooks and netbooks.

The LX5553 and LX5543 modules are both in volume production. Pricing in OEM quantities of 10,000 is $0.85 for the LX5553 and $0.70 for the LX5543. Each is packaged in a compact 16-pin, 3mm x 3mm x 0.55mm MLPQ-16L.

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