Description
SKY77548 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 SKY77548 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.

Features
• High efficiency
44% (GSM850/900)
42% (DCS1800/PCS1900)
• Low transmit supply current 1.30 A (GSM850/900) 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
• PHEMT RF switch affords high linearity, low insertion loss, and less than 20 μA supply current in receive modes
• Small outline
- 8 mm x 6 mm
• Low profile
- 1.05 mm
• Compatible with multiple logic families
• Low APC current: 25 μA

Applications
• Dual-band cellular handsets
encompassing
- Class 4 GSM850/900
- DCS1800/PCS1900
- Class 12 GPRS multi-slot
operation