Analog Devices Inc. HMC595TR

Overview

HMC595TR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT T/R switch for DC–3 GHz RF front-end signal routing in cellular/3G infrastructure and WiMAX transceivers. It delivers 0.3 dB typical insertion loss, +65 dBm input IP3 at +8 V bias, and 3 W RF power handling with positive CMOS/TTL-compatible control (0/+5 V). Its SOT26 package supports compact PCB layouts in high-linearity transmit/receive paths.

For engineers reviewing the HMC595TR datasheet, HMC595TR pinout, HMC595TR application, or HMC595TR equivalent, this page provides verified specifications, functional context, real-world use cases, and validated alternative options for RF switch selection in 3G/WiMAX/WLAN systems requiring low distortion and high isolation.

Technical Context

The HMC595TR implements a reflective GaAs MMIC architecture where RF1 and RF2 present short-circuit terminations when off, enabling high isolation without external termination resistors. Its control logic uses dual CMOS-compatible inputs (A/B) with truth-table-defined RFC-to-RF1 or RFC-to-RRF2 path selection.

It operates across DC–3 GHz with bias-dependent linearity: input P1dB reaches 37 dBm and IP3 hits +65 dBm under +8 V control, while maintaining <0.8 dB insertion loss and >14 dB isolation up to 3 GHz - optimized for high-power T/R switching in FDD systems.

Key Specifications

Pinout & Package

SOT26 package (6-lead, ultra-small surface-mount) with exposed thermal pad; dimensions per Hittite drawing 10-360; MSL1 rating; Sn/Pb lead finish (HMC595 variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC195TR and HMC595E, the HMC595TR delivers 7 dB higher IP3 and 1 W greater power handling than HMC195TR while matching HMC595E's performance - making it optimal for high-reliability infrastructure where distortion and thermal margin are critical.

Availability

HMC595TR is available at Aetrix Electronics and suitable for cellular infrastructure, WiMAX CPE, and automotive telematics applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial-grade RF modules.

Supply support for HMC595TR 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 continues its high-frequency RF IC portfolio, emphasizing performance, integration, and reliability for communications and defense markets.

The HMC595TR belongs to Hittite's GaAs MMIC SPDT switch product line, designed specifically for high-linearity, high-power T/R front-end routing in 3G, WiMAX, and broadband wireless infrastructure.

FAQ

What is the maximum RF input power the HMC595TR can handle?

The HMC595TR supports up to +39 dBm (≈8 W peak) incident RF power at +8 V control voltage across 0.5–2.5 GHz, with absolute maximum channel temperature limited to 150 °C. Derating applies above +85 °C ambient, and DC blocking capacitors are mandatory at all RF ports to prevent damage from bias injection.

Does the HMC595TR require external termination resistors on RF1 and RF2?

No - the HMC595TR uses a reflective SPDT architecture where RF1 and RF2 present short-circuit terminations when off, eliminating the need for external 50 Ω resistors. This reduces component count and PCB area while maintaining >22 dB isolation up to 2 GHz without added loss or thermal load.

What control voltage levels are valid for reliable operation of the HMC595TR?

The HMC595TR accepts control voltages from 0 to +12 Vdc on pins A and B, with defined logic thresholds: "Low" = 0 to +0.2 Vdc (10 µA typical), "High" = +3 to +8 Vdc (2–40 µA typical). Operation at +3 V yields 35 dBm P1dB; +8 V achieves full 37 dBm and +65 dBm IP3 performance.

Is the HMC595TR pin-compatible with the HMC195TR?

Yes - the HMC595TR is explicitly documented as a form-fit-function replacement for the HMC195TR in SOT26 packaging, with identical pinout, footprint, and control interface. However, HMC595TR improves insertion loss by 0.2 dB and IP3 by 7 dB, offering direct upgrade path without PCB redesign.

What is the thermal resistance and recommended grounding for the HMC595TR?

The HMC595TR has a thermal resistance of 173 °C/W from junction to ambient. To ensure reliability, all ground leads (Pins 2, and package bottom thermal pad) must be soldered directly to a solid PCB ground plane using multiple vias - per Hittite's evaluation board layout guidelines in document 10-362.