Description

The SKY77552 is a quad-band transmit and dual-band receive front-end module (FEM) with Integrated Power Amplifier Control (iPAC™) for cellular handsets comprising GSM and DCS/PCS operation. The FEM has quad-band capability in applications of U.S. or Euro dual-band platforms. Designed in a low profile, compact form factor, the SKY77552 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

- 43.5% GSM

- 37.5% DCS/PCS

• Low transmit supply current

- 1.31 A GSM

- 0.96 A DCS/PCS

• Internal ICC sense resistor for iPAC

• Closed loop iPAC

• 50 Ωmatched Input/Output

• Tx–VCO-to-antenna and antenna-to-Rx-SAW filter RF interface

• PHEMT RF switches afford high linearity, low insertion loss, and less than 20 μA supply current in receive modes

• Small, low profile package

- 7 x mm 6 mm x 0.9 mm

• Compatible with multiple logic families

• Low VRAMP current: 25 μA

Applications

• U.S. or Euro dual-band cellular handsets encompassing

- Class 4 GSM850/900

- DCS1800/PCS1900

- Class 12 GPRS multi-slot operation