**HMC311SC70: A 1 GHz to 0 GHz Silicon SPDT Reflective Switch in an SC70 Package**

The **HMC311SC70** represents a significant advancement in the integration and performance of **monolithic microwave integrated circuits (MMICs)**. This device is a **silicon-based, single-pole double-throw (SPDT) reflective switch** designed to operate from **DC to 1 GHz**, making it an exceptionally versatile component for a wide array of RF applications. Its most defining feature is its housing within the ultra-compact **SC70 package**, a form factor that offers a powerful combination of minimal board space and high functionality.

Engineered for seamless integration into space-constrained designs, the HMC311SC70 excels in both **port-to-port isolation** and **low insertion loss**. From DC up to 1 GHz, it typically provides over 40 dB of isolation between the output ports, ensuring minimal signal leakage. Concurrently, its insertion loss remains remarkably low, typically below 0.5 dB, which preserves signal integrity and system dynamic range. The switch utilizes a **reflective design**, meaning that in the off state, the unused port presents a high-impedance mismatch, effectively reflecting the incident signal. This architecture is highly efficient for many switching scenarios.

A key advantage of this component is its **single positive control voltage** operation. It requires a minimal +3V to +5V control signal to switch between its two states, simplifying interface requirements with digital controllers, FPGAs, or microprocessors without the need for negative voltage generators. This feature, combined with its fast switching speed of approximately 10 nanoseconds, makes it ideal for **TDD (Time Division Duplex) systems**, **portable battery-operated equipment**, and **general-purpose signal routing**.

The applications for the HMC311SC70 are extensive. It is perfectly suited for use in **cellular infrastructure** (e.g., LTE, 5G), **wireless LAN** equipment, **test and measurement instruments**, and **RF sensor modules**. Its broadband performance from DC allows it to handle not only RF signals but also baseband and video switching duties, providing exceptional value and design flexibility.

ICGOOODFIND: The HMC311SC70 stands out as a **highly integrated, broadband solution** that delivers **exceptional RF performance** in one of the smallest available packages. Its combination of wide bandwidth, high isolation, low control voltage, and miniature footprint makes it an **indispensable component for modern RF design**, enabling engineers to create more compact, efficient, and high-performing wireless systems.

**Keywords:**

1. **SPDT Switch**

2. **DC to 1 GHz**

3. **SC70 Package**

4. **Reflective Design**

5. **Low Insertion Loss**