Description
The SKY77547 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier Control (iPAC™) for quad-band cellular handsets comprising GSM850/900 and DCS1800/PCS1900 operation. Designed in a low profile, compact form factor, the SKY77547 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% (GSM)
    - 42% (DCS/PCS)
• Low transmit supply current
    - 1.30 A (GSM)
    - 0.86 A (DCS/PCS)
• 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
• Tx harmonics below –33 dBm
• PHEMT RF switch affords high linearity, low insertion loss, and less than 20 μA supply current in receive modes
• Small, low profile package
    - 8 mm x 6 mm x 1.05 mm
    - 30-pad configuration
• Compatible with multiple logic families
• Low APC current: 25 μA

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