skyworks solutions, inc. ? phone [ 781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200500p2 ? skyworks proprietary and confidential information ? products and product informat ion are subject to change with out notice. ? march 22, 2006 1 advance product summary SKY77519 tx-rx fem for quad-band gsm / gprs / edge C single-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 - single-band wcdma antenna switch support features ? small outline: 6 mm x 6 mm ? very low profile: 1.1 mm max. ? 28-pin package ? low input power range - 0 to 6 dbm ? high efficiency - gsm850 40% - gsm900 40% - dcs 35% - pcs 35% ? tx-vco-to-antenna and antenna- to-rx-saw filter rf interface ? tx harmonics below -35dbm ? wideband envelop control path ? input/output matching 50 ? internal ? low apc current: 20 a ? high impedance control inputs 15 a, typical ? gold plated, lead-free contacts skyworks offers lead (pb)-free "environmentally friendly" packaging that is rohs compliant (european parliament for the restriction of hazardous substances). description SKY77519 is a transmit and receive front end module (fem) designed in a very low profile (1.1 mm), compact form factor for quad-band cellular handsets comprising gsm850/900, dcs1800, and pcs1900 operation a complete transmit vco-to-antenna and antenna-to- receive 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 a dedicated high-linearity port. the module consists of a gsm850/900 pa and dcs1800/pcs1900 pa block, impedance- matching circuitry for 50 ? input and output impedances, tx harmonic filtering, high linearity- low 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 pins to distribute current. the output of the pa block and the outputs to the five receive pins connect to the antenna pin 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 SKY77519 are internally matched to a 50 ? load to reduce the number of external components for a quad-ba nd design. extremely low leakage current (10 a, typical) of the fem module maximizes handset standby time. band selection and control of transmit and receive rf signal flows are performed by use of four external control pins. see figure 1 shown below. mode of operation tx, rx, band (gsm850, gsm900, dcs, pcs, and wcdma) is controlled with 4 logic i nputs: bs1, bs2, mode, and enable. proper timing of the enable input and the amplitude control input (vampl) ensures high isolation high isolation between the antenna and tx-vco while the vco is being tuned prior to the transmit burst. the enable input controls the initial turn-on of the pac circuitry to minimize battery drain. the integrated power amplifier control (pac) function provides envelope amplitude control by reducing sensitivity to input drive, temperature, power supply, and process variation.
advance data sheet ? SKY77519 SKY77519 tx-rx fem for quad-band gsm / gprs / edge C single band wcdma antenna switch support skyworks solutions, inc. ? phone [ 781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 2 march 22, 2006 ? skyworks proprietary and confidential information ? products a nd product information are subject to change without notice. ? 200500p2 gnd vbatt dcs/pcs_in vapc enable band sel1 band sel2 mode gsm_in cmos collector voltage amplitude controller and antenna switch decoder match match hbt dcs/pcs_out gsm_out match/ filter match/ filter rx4 rx2 rx1 SKY77519 pa pa rx3 200447_001 to antenna feedpoint wcdma1 antenna switch figure 1. SKY77519 functional block diagram ? 2006, skyworks solutions, inc. all rights reserved. information in this document is provided in connection with sk yworks solutions, inc. ("skyworks") products. these materials are provided by skyworks as a service to its customers and may be used for informational purposes only. skyworks assumes no responsi bility for errors or omissions in these materials. skyworks m ay make changes to its products, specifications and product descriptions at any time, without notice. skyworks makes no commitment to update the information and shall have no responsibili ty whatsoever for conflicts, incomp atibilities, or other difficulties arising from future changes to its products and pro duct descriptions. no license, express or implied, by estoppel or otherwise, to an y intellectual property rights is granted by this document. exce pt as may be provided in skyworks terms and conditions of sale for such products, skyworks assumes no liability whatsoever. these materials are provie "as is " without warranty of any kind, either express or implied, relating to sale and/or use of skyw orks? products incluing warranties relating to fitness for a particular purpose, merchantability, performance, quality or non-infringement of any patent, copyrigh t or other intellectual property right. skyworks further does not warrant the a ccuracy or completeness of the information, text, graphics or other items contain ed within these materials. skyworks shall not be liable for any special, indirect, incident al, or consequential damages, in cluing without limitation, lost revenues or lost profits that may result from the use of these materials. skyworks? products are not intended for use in medical, lifesav ing or life-sustaining applications. skyworks customers using o r selling skyworks? products for use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper use or sale. the following are trademarks of skyworks so lutions, inc.: skyworks?, the skyworks sy mbol, and breakthrough simplicity?. produ ct names or services listed in this publication are for identification purposes only, and may be trad emarks of third parties. third-party bran ds and names are the property of their re spective owners. additional information, posted at www.skywor ksinc.com, is incorporated by reference.
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