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