SKY77590-51

PRELIMINARY DATA SHEET SKY77590-51 Tx-Rx FEM for Quad-Band GSM/ GPRS/ EDGE with Six Linear TRx Switch Ports and Dual-Band TD-SCDMA Applications 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 - 6 low insertion loss / high linearity interchangeable TRx switch ports - Linear EDGE operation - TD-SCDMA Bands 34/39 Description SKY77590-51 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, and 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. 3G switch-through support is provided by six dedicated high-linearity ports. 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 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/PCS...