Analog Devices Inc. HMC232C8TR

Overview

HMC232C8TR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT switch in an 8-lead ceramic SMT package, delivering high isolation (>55 dB @ 2 GHz, >42 dB @ 8 GHz), low insertion loss (1.6 dB typical @ 6 GHz), and non-reflective DC–8 GHz operation with -5/0 V complementary control logic. It serves as a form-fit-functional replacement for HMC132C8 in RF front-end signal routing.

For engineers reviewing the HMC232C8TR datasheet, HMC232C8TR pinout, HMC232C8TR application, or HMC232C8TR equivalent, key selection criteria include isolation vs. frequency, control voltage compatibility (-5/0 V), thermal resistance (94 °C/W), ESD sensitivity (HBM Class 1A), and RF port DC coupling requirements.

Technical Context

The HMC232C8TR implements a non-reflective GaAs MESFET architecture with complementary negative-voltage control (A/B pins at -5 V / 0 V), eliminating need for external bias supplies. Its monolithic design integrates matched 50 Ω RF paths (RFC, RF1, RF2) and on-chip termination for off-state isolation.

Switching is edge-triggered with 3 ns rise/fall time and 5 ns ON/OFF delay across DC–8 GHz. Thermal management relies on soldered ground leads and paddle to PCB RF ground, supporting continuous operation from -40 °C to +85 °C with 150 °C channel limit.

Key Specifications

Pinout & Package

Package: 8-lead ceramic surface-mount (non-hermetic), white alumina body (92%), copper base, electrolytic gold plating (100–200 µin over nickel). Ground leads (pins 2, 3, 8) and exposed paddle must be soldered to PCB RF ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC132C8TR and QM11036, the HMC232C8TR uniquely combines GaAs performance (8 GHz BW, >55 dB isolation), negative-control simplicity, and proven ruggedness for defense and infrastructure RF systems where signal fidelity and thermal reliability are critical.

Availability

HMC232C8TR is available at Aetrix Electronics and suitable for telecom infrastructure, microwave radio & VSAT, military radios & radar, and test instrumentation requiring stable component supply across extended temperature ranges and high-reliability RF performance.

Supply support for HMC232C8TR 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. (ADI) is a global leader in high-performance analog, mixed-signal, and RF ICs, formed through acquisition of Hittite Microwave in 2014.

The HMC232C8TR belongs to ADI's legacy Hittite RF Switch family, engineered specifically for high-isolation, broadband signal routing in demanding defense, aerospace, and wireless infrastructure applications.

FAQ

What is the control voltage requirement for HMC232C8TR?

HMC232C8TR requires complementary negative control voltages: A and B pins accept -5 V (logic high) and 0 V (logic low). The device draws ≤45 µA per control line at -5 V, eliminating need for external bias supplies. This matches legacy Hittite driver circuits and avoids level-shifting complexity in existing designs using the HMC232C8TR.

Does HMC232C8TR support DC-coupled RF operation?

Yes, all RF ports (RFC, RF1, RF2) of the HMC232C8TR are DC-coupled and internally matched to 50 Ω. However, external DC-blocking capacitors are mandatory if the connected RF line has non-zero DC potential, as specified in the HMC232C8TR pin descriptions. Failure to block DC may damage the GaAs FETs or degrade isolation.

What is the maximum RF input power the HMC232C8TR can handle?

HMC232C8TR supports +30 dBm RF input power at +50 °C (absolute max), but continuous operation above +26 dBm is cautioned against unless thermal derating is applied. Its 26 dBm P1dB (typical) and 46 dBm IP3 define its linear operating envelope; exceeding these limits risks compression, intermodulation distortion, or accelerated degradation in the HMC232C8TR.

Is HMC232C8TR pin-compatible with HMC132C8TR?

Yes, HMC232C8TR is explicitly documented as a form-fit-functional replacement for HMC132C8TR, sharing identical 8-lead ceramic package dimensions, pin numbering, pin functions, and electrical specifications. No PCB layout changes are required when upgrading from HMC132C8TR to HMC232C8TR in existing designs.

What thermal considerations apply to HMC232C8TR in high-power applications?

HMC232C8TR has a thermal resistance of 94 °C/W and a maximum channel temperature of 150 °C. To maintain reliability, the package bottom and ground leads (pins 2, 3, 8) must be fully soldered to a low-impedance PCB ground plane. For RF power >20 dBm, thermal vias under the paddle and copper pour area ≥4× package footprint are recommended to manage junction temperature in the HMC232C8TR.