Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

201026A • Skyworks Proprietary and Confidential Information. • Products and product information are subject to change without notice. • February 10, 2009

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PRODUCT SUMMARY

SKY77458 Front-End Module for LTE / EUTRAN Band VIII

(Tx 880-915 MHz), (Rx 925-960 MHz)

Applications

• Long-Term Evolution (LTE)

• Evolved Universal Terrestrial Radio

Access Network (EUTRAN)

• Handsets and Data Cards

Features

• QPSK, 16QAM, 64QAM modulations

• Up to 20 MHz bandwidths

• Up to 100 resource blocks

• Linear power at 3.3 V

- LTE: 25 dBm

- WCDMA: 26 dBm

• Duplexer Tx-Rx attenuation and

isolation: 50 dB

• Integrated Power Detector,

interstage filter and duplexer

• Low voltage positive bias supply:

3.0 V to 4.6 V

• Supports low collector voltage

operation down to 1.5 V

• Excellent linearity, efficiency

• Large dynamic range

• Low Profile 16-pad package:

4 mm x 7 mm x 1.1 mm

• Analog bias current control in low

power mode using VBA pad

• InGaP BiFET Technology

• Skyworks Green™ Packaging

Description

The SKY77458 Front-End Module (FEM) is a fully matched, 16-pad surface mount module

developed for LTE/EUTRAN applications. Small and efficient, this LTE FEM integrates the

interstage filter, input and output matching, power amplifier, power detection, and duplexer

into a single 4 mm x 7 mm x 1.1 mm package. The SKY77458 meets the stringent spectral

linearity requirements of LTE with QPSK/16QAM modulations from 1.4 to 20MHz bandwidth

and full or partial resource block allocations with high power added efficiency. The FEM

incorporates Inter-Stage Filter and Duplexer, InGaP BiFET PA, and output power detector.

Integration of the RF front-end greatly simplifies the design of the 4G-compatible handset

radio or data card as all critical matching between the interstage filter, PA, power detection,

and duplexer is optimized within the single module component. By optimizing the efficiency

of the InGaP BiFET PA MMIC, reducing RF loss between the integrated components and

within the Duplexer itself, and improving the match between the PA and the Duplexer, this

FEM achieves low current at maximum output power that significantly reduces the power

dissipated in the LTE-enabled handsets or data cards. Primary bias to the SKY77458 is

supplied via the VCC1 and VCC2 pads directly from a three-cell Ni-Cad, a single-cell Li-Ion,

or other suitable batteries with outputs in the 3.0 to 4.6 volt range, while the bias network is

powered up with the VCCB pad. DC-DC converter operation can be supported with lower

power operation down to 1.5V. Power down is accomplished by setting a logic low level on

the VEN pad. No external supply side switch is needed as typical “off” leakage is 100

microamperes with full primary voltage supplied from the battery. The VMODE pad is used to

switch between high and low power modes to reduce current consumption and gain in the

back – off conditions. VBA is used to further control the current consumption in the low

power mode.

This small package uses Skyworks’ low cost, multi - layer laminate substrate technology and

is approximately half the size of individually packaged component solutions. The SKY77458

front-end module can save handset and data card designers significant board space and

design-cycle time, and significantly simplify supply chain and sourcing of RF components.

Figure 1. Functional Block Diagram