FM8545概述：
TheFM8545 is very low loss SP4T specifically designed for high performance antenna tuning applications. All RF path performance is enhanced with ultra-low on state resistance and off state capacitance.
FM8545 allows the creation of advanced tuningtopologies to maximize TRP & TIS performance in space constrained applications.
The FM8545 SP4T tuner is provided in a compact QFN 1.1mm x 1.5mm x 0.5mm package. A functional block diagram is shown in Figure 1.
The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin description are provided in Table 1
FM85455特性：
Very Linear Performance
Off Ports, ‘open Type’
Two pin GPIO control Interface for standard SP4T operation
Very Small 1.1mm x 1.5mm
Very low profile, 0.5mm
Ultra-Low On-resistance, 1.0 Ω
FM8545应用：
Antenna Tuning
Band Switching
Impedance Tuning
FM8545功能框图：
FM8545引脚配置：
FM8545引脚说明：
FM8545应用示意图：
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