PRODUCT SUMMARY SKY77594 Tx-Rx FEM for Quad-Band GSM / GPRS / EDGE with Two Rx Switch Ports and Dual-Band TD-SCDMA Applications Description • Quad-band GSM/EDGE and DualBand TD-SCDMA cellular handsets encompassing - Class 4 GSM850 / 900 - Class 1 DCS1800 / PCS1900 - Class 12 GPRS multi-slot operation - 2 low insertion loss / interchangeable Rx switch ports - Linear EDGE operation - TD-SCDMA Bands 34/39 SKY77594 is a transmit and receive Front End Module (FEM) designed in a very low profile (0.9 mm) and compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800/PCS1900 operation and dual-band TD-SCDMA bands 34 and 39 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 linear EDGE operation. The module consists of a GSM850/900 PA and DCS1800/PCS1900/TD-SCDMA PA block, impedance-matching circuitry for 50 Ω input and output impedances, Tx harmonic filtering, a high linearity/low insertion loss switch, and a CMOS Power Amplifier Control (PAC) block. A Features custom silicon integrated circuit contains decoder circuitry to control the RF switch while • Small, low profile package - 6 mm x 6 mm x 0.9 mm - 28-pad configuration Fabricated in GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the providing a low current, external control interface. • Low input power range 0 dBm to 6 dBm GSM850/900 bands and DCS1800/PCS1900 bands and TD-SCDMA bands 34/39. Both PA • High efficiency the outputs to the two receive pads connect to the antenna pad through a high-linearity • Tx-VCO-to-antenna and antennato-Rx-SAW filter RF interface antenna switch. The Rx ports feature a 0 volts DC offset level which eliminates the need for blocks share common power supply pads to distribute current. The output of the PA block and external blocking capacitors. The GaAs die, switch die, CMOS controller die, and passive • Tx harmonics below –38 dBm components are mounted on a multi-layer laminate substrate and the entire assembly is • Current limiting for over-voltage protection and extended battery life encapsulated with plastic overmold. • Input/Output matched internally to 50 Ω number of external components on the phone board. Extremely low leakage current of the FEM • High impedance control inputs: 20 µA, maximum selection are performed by four external control pads (see Figure 1 on overleaf). Mode of • Power control circuitry built-in for improved TRP variation RF input and output ports of the SKY77594 are internally matched to a 50 Ω load to reduce the maximizes handset standby time. Control of transmit and receive RF signal flows, and band operation, Tx vs. Rx, and Band (GSM850, GSM900, DCS1800, PCS1900, and Bands 34/39) are controlled with the four logic inputs: Mode, TxEN, BS1, and BS2. Proper timing of the TxEN input and the VRAMP input ensures high isolation between the antenna and Tx-VCO while the VCO is being tuned prior to the transmit burst. The integrated power amplifier control (PAC) function provides envelope amplitude control while reducing sensitivity to input drive, temperature, power supply, and process variation. Output power variation into mismatch is minimized with Skyworks’ Finger-Based Integrated Power Amplifier Control (FB-iPAC) control circuit. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202847A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2013 1 Ordering Information Product Name Order Number SKY77594 Tx-Rx Front-End Module SKY77594 Evaluation Board Part Number © 2013, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. 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