SKY77554-21

PRODUCT SUMMARY SKY77554-21 Tx Quad-Band / Rx Dual-Band BiFET iPAC™ FEM for GSM / GPRS (824-915 MHz and 1710-1910 MHz) w/ Dual WCDMA TRx Switch Applications Dual-band cellular handsets encompassing - Class 4 GSM850/900 - DCS1800/PCS1900 - Class 12 GPRS multi-slot operation Features High efficiency - 42% (GSM850) - 42% (GSM900) - 42% (DCS1800) - 41% (PCS1900) Low transmit supply current - 1.36 A (GSM850) - 1.36 A (GSM900) - 0.86 A (DCS1800/PCS1900) Internal ICC sense resistor for iPAC Closed loop iPAC 50 Ω matched Input/Output Tx–VCO-to-antenna and antenna-to-Rx-SAW filter RF interface RF switch affords high linearity, low insertion loss, and 0 V DC on Rx ports Small, low profile package - 6 mm x 6 mm x 0.9 mm - 28-pad configuration Description SKY77554-21 is a transmit and receive Front-End Module (FEM) with Integrated Power Amplifier Control (iPAC™) for Dual-band cellular handsets comprising GSM850/900 and DCS1800/PCS1900 operation. Designed in a low profile, compact form factor, the SKY77554-21 offers 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. The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, impedancematching circuitry for 50 ohm input and output impedances, Tx harmonics filtering, high linearity / low insertion loss RF switch, and a Power Amplifier Control (PAC) block with internal current sense resisto...