HMC349 RF Switch Module 3-5V 50 Ohm SMA Interface

The HMC349 RF Switch Module is a high-performance, nonreflective, gallium arsenide single-pole, double-throw  switch designed for operation from 100 MHz to 4 GHz. This module is ideal for applications in wireless infrastructure, mobile radios, and test equipment where high isolation and low insertion loss are critical. The module features a 50 Ohm impedance and is compatible with SMA connectors , making it easy to integrate into various RF systems. It operates on a single, positive supply voltage ranging from 3V to 5V and offers CMOS/TTL-compatible control logic. The HMC349 provides excellent power handling capabilities, with a typical 1 dB power compression of 34 dBm and a third-order intercept point of 53 dBm, ensuring reliable performance in demanding environments.

Features:

• Made of material, corrosion‑resistant, anti‑oxidation, increased service life.
• High working frequency, increases the scope of application, strong practicality.
• The large heat dissipation area can increase the continuous working time.
• Advanced manufacturing technology, high reliability and stable performance.
• Built to meet standard specification, strictly follow factory quality control.

Specification:

Parameter	Specification
Switch Type	SPDT (single-pole, double-throw)
Frequency Range	0.1–4.0 GHz
Insertion Loss	≈1.0 dB (≤2 GHz)
Isolation	up to ~62 dB (≤2 GHz)
Input Return Loss	≥15–20 dB (typical, ≤2 GHz)
Input P<sub>1dB</sub>	≈34 dBm (V<sub>DD</sub>=5 V)
Input IP<sub>3</sub>	≈53 dBm (V<sub>DD</sub>=5 V)
Supply Voltage (V<sub>DD</sub>)	+3.0 – +5.0 V
Control Interface	CMOS/TTL logic (3–5 V, active-low enable)
Impedance	50 Ω
Connectors	SMA (female) for RFC, RF1, RF2 ports
Dimensions	40mm×30mm

Pin Configuration:

SMA Connectors:

• RFC: RF Common Port (50 Ohm, DC-coupled, requires external DC blocking capacitor).
• RF1: RF Throw Port 1 (50 Ohm, DC-coupled, requires external DC blocking capacitor).
• RF2: RF Throw Port 2 (50 Ohm, DC-coupled, requires external DC blocking capacitor).

4-Pin Header:

Pin Position	Label	Description
1 (leftmost)	GND	Ground
2	VDD	Supply Voltage (3V to 5V)
3	CTRL	Logic Control Input
4 (rightmost)	EN	Logic Enable Input

Applications:

• Wireless infrastructure.
• Mobile radios.
• Test equipment.

Package Includes:

• 1 x HMC349 RF Switch Module with SMA interfaces.
• 1 x connection cable.
• 1 x Qualified Certificate.