Analog Devices Inc. 104124-HMC336MS8G

Overview

HMC336MS8G from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT non-reflective switch with positive control logic, operating from DC to 6 GHz in a low-cost MSOP8G package. It delivers 1.6 dB insertion loss and 42 dB isolation at 6 GHz, requires +5 V bias and 0/+5 V control signals, and supports both 50-Ω and 75-Ω systems for RF signal routing in broadband infrastructure.

For engineers reviewing the HMC336MS8G datasheet, HMC336MS8G pinout, HMC336MS8G application, or HMC336MS8G equivalent, key selection criteria include its non-reflective architecture, DC-coupled RF ports requiring external blocking capacitors, temperature-stable RF performance across –40°C to +85°C, and compatibility with high-speed switching (<20 ns t_ON/t_OFF) in compact SMT layouts.

Technical Context

The HMC336MS8G implements a GaAs MESFET-based SPDT topology with non-reflective termination in all states, enabling stable impedance matching at RF1 and RF2 regardless of switch position. Its positive-control interface uses two independent TTL-compatible inputs (CTLA/CTLB) to select RFC→RF1 or RFC→RF2 paths without external level-shifting.

DC blocking capacitors are mandatory at RFC, RF1, and RF2 - their values directly set the low-frequency cutoff. The exposed ground paddle and pins 6–7 must be soldered to PCB RF ground to maintain specified isolation and return loss performance up to 6 GHz.

Key Specifications

Pinout & Package

Package: MSOP8G (8-lead mini small-outline package with exposed ground paddle); body material is low-stress injection-molded plastic; Sn/Pb lead finish; MSL1 rating; marking "H336".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPDT switch applications.

Compared with HMC336MS8G, HMC349ALP4CE extends usable bandwidth but adds supply and control complexity, while QM11036 offers simpler integration at the expense of RF dynamic range and isolation margin.

Availability

HMC336MS8G is available at Aetrix Electronics and suitable for broadband test equipment, fiber optic transceivers, and switched filter banks requiring stable component supply, consistent RF performance, and long-term obsolescence management.

Supply support for HMC336MS8G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and aerospace markets with precision signal processing solutions.

The HMC336MS8G belongs to Analog Devices' legacy Hittite Microwave RF switch product line, engineered for high-isolation, low-loss signal routing in DC–6 GHz infrastructure and instrumentation applications.

FAQ

What is the minimum operating frequency of the HMC336MS8G?

The HMC336MS8G operates from DC, but its low-frequency limit is determined by external DC-blocking capacitors at RFC, RF1, and RF2. For example, a 100 pF capacitor sets f_c ≈ 16 MHz in a 50-Ω system. The HMC336MS8G itself imposes no intrinsic lower bound beyond this passive constraint.

Does the HMC336MS8G require external biasing components?

No external biasing components are needed beyond the +5 V V_DD supply and 0/+5 V control signals. However, DC-blocking capacitors are mandatory at RFC, RF1, and RF2 to prevent DC path conflicts and define low-frequency response. The HMC336MS8G integrates all active bias circuitry internally.

Can the HMC336MS8G be used in 75-Ohm video or CATV systems?

Yes - the HMC336MS8G is explicitly characterized for use in both 50-Ω and 75-Ω systems. Its non-reflective architecture maintains impedance match across both standards, making it suitable for broadband video distribution, cable modem front-ends, and DOCSIS-compliant signal routing where HMC336MS8G performance remains consistent.

What is the thermal management requirement for the HMC336MS8G?

The HMC336MS8G features an exposed ground paddle that must be soldered to a PCB RF ground plane to ensure proper thermal dissipation and RF performance. Without this connection, insertion loss increases and isolation degrades - the HMC336MS8G datasheet specifies no thermal derating curves because adequate paddle soldering is mandatory for all rated specifications.

Is the HMC336MS8G pin-compatible with the HMC336MS8GE variant?

Yes - the HMC336MS8G and HMC336MS8GE share identical pinout, footprint, and electrical specifications. The only differences are RoHS compliance (matte Sn finish vs. Sn/Pb), MSL peak reflow temperature (260°C vs. 235°C), and package marking. The HMC336MS8G remains fully interchangeable with HMC336MS8GE in existing designs.