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Skyworks SKY65170-21 is a fully-matched, 0.5 W Power Amplifier (PA) with high efficiency, designed for use in the 860 to 960 MHz band. The device is fabricated using Skyworks high reliability Indium Gallium Phosphide (InGaP) Heterojunction Bipolar Transistor (HBT) technology. This process allows for single supply operation while maintaining high efficiency and good linearity. The SKY65170-21 contains all of the active bias and RF matching circuits, which make it easy to integrate into 50 Ω RF systems. The internal input and output match are optimized for gain, 1 dB Output Compression Point (OP1dB), Adjacent Channel Leakage Ratio (ACLR), Adjacent Channel Power Ratio (ACPR), and efficiency when integrated in a 50 Ω system. The primary bias to the SKY65170-21 can be supplied directly from a single 5 VDC supply. The PA is designed to operate with lower current by reducing the bias voltage. The device is internally matched and mounted in a 20-pin, 6 x 6 mm Multi-Chip Module (MCM) Surface-Mounted Technology (SMT) package, which allows for a highly manufacturable low cost solution.