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