SKY77526 Tx FEM is designed for quad band cellular handsets comprising GSM850/900, DCS1800, PCS1900, supporting GMSK and linear EDGE modulation and Class 12 GPRS multi-slot operation. The module consists of separate GSM850/900 and DCS1800/PCS1900 PA blocks, 50-ohms impedance-matched inputs and outputs, a multifunction power amplifier control (MFC) block, low-pass harmonic rejection filters, and an SP6T Antenna T/R switch. The integrated MFC provides closed-loop power control in GMSK mode, reducing sensitivity to antenna load, input drive, temperature, power supply, and process variation. In EDGE mode, the MFC configures the PA for fixed gain and provides the ability to optimize the PA bias operation at different power levels. See the SKY77526 Product Summary below for more details. Please note: SKY77526 is being discontinued and is not recommended for new design. The suggested replacement is SKY77528 .