Description

The SKY77542 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier

Control (iPAC™) for dual-band cellular handsets comprising GSM900 and DCS1800 operation.

Designed in a low profile, compact form factor, the SKY77542 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

- GSM900 45.0

- DCS1800 38.5

• Low transmit supply current

- GSM900 1.26 A

- DCS1800 0.93 A

• 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

• Tx harmonics below –33 dBm

• PHEMT RF switches afford high linearity, low insertion loss, and less than 20 μA

supply current in receive modes

• Small outline: 7 x 6 mm

• Low profile: 0.9 mm

• Compatible with multiple logic families

• Low APC current: 25 μA

Applications

• Dual-band cellular handsets encompassing

- Class 4 GSM900

- DCS1800

- Class 12 GPRS multi-slot operation