Analog Devices Inc. 104124-HMC574MS8

Overview

HMC574MS8 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT T/R switch for DC–3 GHz transmit/receive signal routing in RF front-ends. It delivers 0.3 dB typical insertion loss at 2 GHz, +65 dBm input third-order intercept at +8 V bias, and 30 dB isolation - enabling high-linearity cellular/3G infrastructure and WiMAX transceivers with 5 W RF power handling.

For engineers reviewing the HMC574MS8 datasheet, HMC574MS8 pinout, HMC574MS8 application, or HMC574MS8 equivalent, this page provides verified specifications, truth-table-driven control logic, thermal and ESD ratings, MSOP-8 package details, and validated alternatives for RF switch selection in high-power, low-distortion wireless systems.

Technical Context

The HMC574MS8 implements a reflective GaAs MMIC architecture where RF1 and RF2 present short-circuit terminations when off, minimizing leakage and enabling broadband operation from DC to 3 GHz. Its dual-control logic (A/B pins) selects RFC→RF1 or RFC→RF2 paths with 120 ns switching time and no external biasing components required.

It operates from a single +3 to +8 V supply with <40 μA quiescent current, supports TTL/CMOS-compatible control inputs, and requires DC blocking capacitors on all three RF ports (RFC, RF1, RF2). Thermal resistance is 100 °C/W with 150 °C max channel temperature.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mini Small Outline Package), RoHS-compliant variant HMC574MS8E uses matte Sn finish; standard HMC574MS8 uses Sn/Pb. MSL1 rating, 235 °C peak reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with QM11036 and ADMV7710, the HMC574MS8 offers optimal balance of 5 W power handling, +65 dBm linearity, and MSOP-8 footprint for cost-sensitive infrastructure RF front-ends - while maintaining compatibility with legacy +3 to +8 V bias architectures.

Availability

HMC574MS8 is available at Aetrix Electronics and suitable for cellular infrastructure, WiMAX base stations, and automotive telematics requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.

Supply support for HMC574MS8 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, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and automotive markets with precision signal processing solutions.

The HMC574MS8 belongs to Analog Devices' legacy Hittite RF switch product line, designed specifically for high-linearity, high-power T/R switching in wireless infrastructure and test equipment where GaAs performance exceeds silicon alternatives.

FAQ

What is the maximum RF input power the HMC574MS8 can handle continuously?

The HMC574MS8 supports 39 dBm (≈8 W) continuous RF input power at +8 V bias within its DC–2.5 GHz range, with thermal derating above +85 °C. Its 0.65 W continuous power dissipation rating and 100 °C/W thermal resistance ensure safe operation under sustained high-power conditions typical in macrocell base stations.

Does the HMC574MS8 require external DC blocking capacitors on all RF ports?

Yes - the HMC574MS8 requires external DC blocking capacitors on RFC, RF1, and RF2 ports because all RF terminals are DC-coupled. Capacitor value determines the low-frequency cutoff; for example, a 100 pF capacitor sets f_low ≈ 16 MHz in a 50 Ω system. This is mandatory to prevent bias disruption and ensure proper impedance matching.

What is the control logic voltage range for the A and B pins of the HMC574MS8?

The HMC574MS8 A and B control inputs accept logic levels from –0.2 V to Vdd (up to +10 V), with defined thresholds: Low = 0 to +0.2 V at 10 μA, High = Vdd ± 0.2 V at 10 μA. This allows direct interfacing with +3 V, +5 V, or +8 V CMOS/TTL logic without level shifters - a key design advantage over voltage-restricted alternatives.

How does the HMC574MS8 perform at elevated temperatures like +85 °C?

At +85 °C, the HMC574MS8 maintains functional operation with measured degradation: insertion loss increases by ≤0.1 dB, isolation decreases by ≤2 dB, and P1dB drops ~1–2 dB versus +25 °C data. Its specified operating range is –40 to +85 °C, and thermal design must account for 10 mW/°C derating above +85 °C ambient.

Is the HMC574MS8 pin-compatible with the HMC574MS8E variant?

Yes - the HMC574MS8 and HMC574MS8E share identical pinout, electrical specifications, and mechanical outline. The sole difference is RoHS compliance: HMC574MS8E uses 100% matte Sn lead finish and 260 °C peak reflow, while HMC574MS8 uses Sn/Pb and 235 °C reflow. Both are drop-in replacements in compatible assembly processes.