Analog Devices Inc. 108333-HMC241LP3

Overview

HMC241LP3 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SP4T non-reflective RF switch operating from DC to 4 GHz, featuring 0.7 dB insertion loss and 43 dB isolation at 2 GHz, with integrated 2:4 TTL decoder and single +5 V supply-used in base station front-ends and WLAN transceivers.

For engineers reviewing the HMC241LP3 datasheet, HMC241LP3 pinout, HMC241LP3 application, or HMC241LP3 equivalent, key selection criteria include its non-reflective architecture, TTL/CMOS-compatible dual-control interface, 3×3 mm leadless SMT package, and RF performance across DC–4 GHz with no external bias sequencing required.

Technical Context

The HMC241LP3 implements a monolithic GaAs MMIC SP4T switch topology with on-die termination for all off-state ports, enabling true non-reflective operation. Its integrated 2:4 decoder accepts two TTL/CMOS logic inputs (A, B) to select one of four RF paths (RF1–RF4) to the common RFC port without external logic.

Biasing requires only a single +5 V supply (±10%), drawing 2.7 mA typical current. DC blocking capacitors are mandatory at RFC and all RF1–RF4 ports per design specification, and all ground pins-including exposed paddle-must be soldered to PCB RF ground for optimal isolation and thermal performance.

Key Specifications

Pinout & Package

Package: 3×3 mm, 16-pin low-stress injection-molded plastic with exposed copper alloy paddle (Sn/Pb plating), MSL1 rated, max reflow 235 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SP4T RF switch applications.

Compared with HMC241LP3E, the HMC241LP3 offers identical RF performance but differs in lead finish and reflow tolerance; versus QM11036, it delivers superior isolation and integrated control at the cost of higher supply voltage and GaAs process sensitivity.

Availability

HMC241LP3 is available at Aetrix Electronics and suitable for base station infrastructure, WLAN access point development, and RF test equipment requiring stable component supply with legacy GaAs RF switch performance.

Supply support for HMC241LP3 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 acquired Hittite Microwave in 2014 and maintains its high-frequency RF portfolio, specializing in GaAs, GaN, and SiGe MMIC solutions for communications and defense.

The HMC241LP3 belongs to Hittite's legacy SP4T non-reflective switch family, designed specifically for broadband wireless infrastructure requiring low-loss, high-isolation RF path selection without external termination or bias sequencing.

FAQ

What is the operating temperature range for the HMC241LP3?

The HMC241LP3 operates from –40 °C to +85 °C ambient temperature. Its GaAs MMIC die and package thermal resistance (200 °C/W on insertion path) allow reliable continuous-wave RF operation within this range when mounted per recommended land pattern with full ground paddle soldering.

Does the HMC241LP3 require external DC blocking capacitors?

Yes, the HMC241LP3 requires external DC blocking capacitors at RFC and all RF1–RF4 ports, as stated in the datasheet notes and pin descriptions. These capacitors prevent DC bias from interfering with connected RF components and maintain proper 50 Ω AC coupling across the full DC–4 GHz band.

Is the HMC241LP3 pin-compatible with the HMC241LP3E?

Yes, the HMC241LP3 and HMC241LP3E share identical pinout, package dimensions, and electrical specifications. The only differences are leadframe plating (Sn/Pb vs. matte tin) and maximum reflow temperature (235 °C vs. 260 °C), making them mechanically and electrically interchangeable in most layouts.

What is the input power handling capability of the HMC241LP3?

The HMC241LP3 supports +27 dBm input power from 0.5–4.0 GHz and +20 dBm from 0.05–0.5 GHz at Vdd = +5 Vdc. Its 1 dB compression point is 26 dBm, and third-order intercept is 45 dBm (two-tone, +7 dBm each tone), confirming robust linearity for multi-carrier systems.

Can the HMC241LP3 be used with 3.3 V logic control signals?

Yes-the HMC241LP3 accepts TTL/CMOS logic levels: "LOW" is defined as 0–0.8 Vdc (5 µA sink), and "HIGH" as +2.0–+5.0 Vdc (70 µA sink). Standard 3.3 V CMOS outputs meet the HIGH threshold and drive capability, enabling direct interface with FPGAs and microcontrollers without level shifters.