Description

The SKY77543 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier Control (iPAC™) for dual-band cellular handsets comprising 850 and PCS1900 operation. Designed in a low profile, compact form factor, the SKY77543 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

- GSM850 45.0

- PCS1900 38.5

• Low transmit supply current

- GSM850 1.26 A

- PCS1900 0.93 A

• 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 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 GSM850

- PCS1900

- Class 12 GPRS multi-slot operation