The **SW-164-R2** is a specific electronic component, typically categorized as a **GaAs (Gallium Arsenide) SP4T (Single Pole Four Throw) Absorptive Switch**. It is designed for high-frequency RF (Radio Frequency) applications where signal routing and isolation are critical. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the SW-164-R2: | Parameter | Specification (Typical) | | :--- | :--- | | **Frequency Range** | DC to 2.0 GHz | | **Insertion Loss** | 0.7 dB to 1.1 dB (depending on frequency) | | **Isolation** | 35 dB to 50 dB | | **Switching Speed** | 20 ns to 50 ns | | **Control Interface** | CMOS/TTL compatible | | **Package Type** | PQFN or similar surface mount | --- ### 2. Functional Description The SW-164-R2 acts as a digital traffic controller for microwave and radio signals. * **Absorptive Design:** Unlike "reflective" switches that bounce unused signals back to the source, an absorptive switch uses internal 50-ohm terminations to "absorb" the signal in the OFF state. This maintains a low Voltage Standing Wave Ratio (VSWR) and prevents signal interference back into the circuit. * **SP4T Configuration:** It has one input (Pole) and four output paths (Throws). By applying specific voltage patterns to the control pins, the user can choose which output the signal travels through. ### 3. Pin Configuration & Logic The device typically requires a dual-bit or multi-bit control logic. Below is a conceptual example of how the switching logic usually operates: ```c // Example Logic Table (Simplified) // C1, C2 = Control Pins; RFC = Input; RF1-4 = Outputs Logic [0, 0] -> RFC to RF1 (RF2,3,4 terminated) Logic [1, 0] -> RFC to RF2 (RF1,3,4 terminated) Logic [0, 1] -> RFC to RF3 (RF1,2,4 terminated) Logic [1, 1] -> RFC to RF4 (RF1,2,3 terminated) ``` --- ### 4. Common Applications Due to its high speed and low loss, the SW-164-R2 is found in: 1. **Base Stations:** For switching between different antennas or filters. 2. **Test Equipment:** Routing signals to various measurement modules. 3. **WLAN/Bluetooth:** Managing signal paths in wireless communication devices. 4. **Digital Radio:** High-speed signal modulation and path selection.