Description
The SKY77555 is a transmit and receive front-end module (FEM) based on CMOS Power Amplifier for dual-band cellular handsets comprising GSM900 and DCS1800 operation. Designed in a low profile, compact form factor, the SKY77555 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
• Efficiency
   - 36% GSM (33.0 dBm)
   - 29% DCS (30.5 dBm)
• Log linear power control response with <100 dB/V power control slope
• Low Rx band noise
• Supply current
   - 1.58 A GSM (33.0 dBm)
   - 1.10 A DCS (30.5 dBm)
• Fully integrated closed loop
• 50 Ω matched Input/Output
• Tx–VCO-to-antenna and antenna-to-Rx-SAW filter RF interface
• PHEMT RF switches afford high linearity, low insertion loss, and low current in receive modes
• Small, low profile package
   - 5 mm x 6 mm x 1.05 mm
• Compatible with multiple logic families

APPLICATIONs
• Dual-band cellular handsets encompassing
   - Class 4 GSM900
   - DCS1800
   - Class 12 GPRS multi-slot operation