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SKY77521

Skyworks Solutions
Part Number SKY77521
Manufacturer Skyworks Solutions
Description TX-RX FEM
Published Feb 24, 2010
Detailed Description www.DataSheet4U.com ADVANCE DATA SHEET SKY77521 TX-RX FEM for Quad-Band GSM / GPRS / EDGE – Triple-Band WCDMA Antenna ...
Datasheet PDF File SKY77521 PDF File

SKY77521
SKY77521

Overview
www.
DataSheet4U.
com ADVANCE DATA SHEET SKY77521 TX-RX FEM for Quad-Band GSM / GPRS / EDGE – Triple-Band WCDMA Antenna Switch Support Applications • Quad-band cellular handsets encompassing - Class 4 GSM850/900 - Class 1 DCS1800 PCS1900 - Class 12 GPRS multi-slot operation - EDGE polar modulation - Triple band WCDMA antenna switch support Description SKY77521 is a transmit and receive Front End Module (FEM) designed in a very low profile (1 mm), compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation — a complete transmit VCO-to-Antenna and Antenna-toreceive SAW filter solution.
The FEM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation and EDGE Polar Modulation.
WCDMA switch-through support is provided by three dedicated high-linearity ports.
The module consists of a GSM850/900 PA and DCS1800/PCS1900 PA block, impedancematching circuitry for 50 Ω input and output impedances, TX harmonic filtering, high linearitylow insertion loss switches, and a CMOS Power Amplifier Control (PAC) block.
A custom silicon integrated circuit contains decoder circuitry to control the RF switch while providing a low current external control interface.
Fabricated in InGaP/GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the GSM850/900 bands and DCS1800/PCS1900 bands.
Both PA blocks share common power supply pads to distribute current.
The output of the PA block and the outputs to the seven receive pads connect to the antenna pad through a highly linear antenna switch.
The InGaP/GaAs die, switch die, Silicon (Si) controller die, and passive components are mounted on a multi-layer laminate substrate and the entire assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77521 are internally matched to a 50 Ω load to reduce the number of external components for a quad-band design.
Extremely low leakage current (10 μA, typical) of the FEM maximizes handset standby ti...


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