**HMC849ALP4CE: A 1 GHz to 28 GHz, Nonreflective SP4T Switch in a Leadless 4x4 mm QFN Package**

The **HMC849ALP4CE** represents a significant advancement in high-frequency switching technology, offering exceptional performance from **1 GHz to 28 GHz**. This nonreflective, single-pole four-throw (SP4T) switch is engineered for next-generation telecommunications, test and measurement, and military/aerospace systems where signal integrity, bandwidth, and miniaturization are paramount.

A key feature of this device is its **nonreflective design**. Unlike traditional reflective switches, which can cause damaging signal reflections back to sensitive components when in the off state, the HMC849ALP4CE terminates unused ports to a matched 50-ohm load. This architecture is critical for protecting power amplifiers, oscillators, and other active components in the RF chain from potential damage and ensures greater system stability.

The switch delivers outstanding RF performance across its entire ultra-wide bandwidth. It achieves a low **insertion loss of just 1.8 dB** at 20 GHz, preserving valuable signal strength. Its high **isolation is exceptional, measuring 50 dB at 20 GHz**, effectively preventing signal leakage between channels. Furthermore, it handles input power levels up to +29 dBm, making it robust enough for high-power applications.

Housed in a compact, **leadless 4x4 mm QFN package**, this switch addresses the critical need for space savings on densely populated printed circuit boards (PCBs) without compromising thermal or electrical performance. The package provides a reliable interface with low parasitic effects, which is vital for maintaining performance at millimeter-wave frequencies. The device is controlled via a parallel CMOS/TTL-compatible interface, simplifying integration with modern digital systems.

**ICGOOODFIND**: The HMC849ALP4CE stands out as a superior solution for high-frequency systems, masterfully combining wide bandwidth, nonreflective architecture, high power handling, and miniaturized packaging to meet the demanding requirements of modern RF design.

**Keywords**: Nonreflective Switch, SP4T, 28 GHz, QFN Package, High Isolation.