Analog Devices Inc. HMC232C8

Overview

HMC232C8 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT switch in a surface-mount ceramic 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-ideal for RF front-end path selection in microwave radios.

For engineers reviewing the HMC232C8 datasheet, HMC232C8 pinout, HMC232C8 application, or HMC232C8 equivalent, key selection criteria include its broadband isolation performance, absence of bias supply requirement, thermal resistance (94 °C/W), ESD sensitivity (HBM Class 1A), and compatibility with 50 Ω RF system design practices.

Technical Context

The HMC232C8 implements a GaAs MESFET-based non-reflective SPDT architecture with complementary negative-voltage control (A/B pins at -5 V / 0 V), enabling fast switching (tRISE/tFALL = 3 ns, tON/tOFF = 5 ns) without external bias. Its DC-coupled 50 Ω RF ports (RFC, RF1, RF2) require blocking capacitors when DC potential differs from ground.

Thermal management relies on soldering all ground leads (pins 2, 3, 8) and the copper package bottom to PCB RF ground; maximum channel temperature is 150 °C, with operating range from -40 °C to +85 °C and storage up to +150 °C.

Key Specifications

Pinout & Package

Package: 8-lead non-hermetic surface-mount ceramic package (white alumina body, copper base, electrolytic gold plating); dimensions exclude lid seal protrusion; requires RF ground connection via all ground leads and package bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC132C8, the HMC232C8 offers identical integration but updated process consistency; versus QM11036, it delivers superior isolation above 3 GHz and negative-control compatibility, albeit with narrower voltage control flexibility and higher minimum operating temperature limit.

Availability

HMC232C8 is available at Aetrix Electronics and suitable for telecom infrastructure, microwave radio & VSAT, and military radar applications requiring stable component supply, long-term lifecycle support, and traceable GaAs MMIC sourcing.

Supply support for HMC232C8 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 semiconductor leader specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing and connectivity.

The HMC232C8 belongs to Analog Devices' legacy Hittite Microwave RF switches product line, engineered for high-isolation, broadband, non-reflective signal routing in defense, aerospace, and communications infrastructure.

FAQ

What is the control voltage requirement for the HMC232C8?

The HMC232C8 uses complementary negative logic: Control pin "High" is -5 V (typical, -7 V max), "Low" is 0 to -0.2 V. No positive voltage or bias supply is needed. The HMC232C8 operates reliably across this range at 25 °C ambient, with specified performance maintained from -40 °C to +85 °C.

Does the HMC232C8 require external DC blocking capacitors?

Yes - all RF ports (RFC, RF1, RF2) are DC-coupled and matched to 50 Ω, so external blocking capacitors are mandatory if the connected RF line has non-zero DC potential. This prevents unintended biasing of the GaAs MESFETs and ensures specified RF performance. The HMC232C8 datasheet explicitly states this requirement in the Pin Descriptions section.

What is the maximum RF input power the HMC232C8 can handle?

The HMC232C8 supports +30 dBm RF input power at +50 °C (absolute maximum rating), but for linear operation, the 1 dB compression point is 22–26 dBm across 0.5–8 GHz. Continuous operation above +26 dBm at Vctl = 0/-5 Vdc is cautioned against ("Do not 'Hot Switch'") per the datasheet. Derating is required at elevated temperatures.

Is the HMC232C8 pin-compatible with the HMC132C8?

Yes - the HMC232C8 is explicitly documented as a form, fit, and functional replacement for the HMC132C8, sharing identical 8-lead ceramic package dimensions, pin numbering, pin functions, and electrical specifications. No PCB layout changes are required when upgrading from HMC132C8 to HMC232C8.

What is the ESD sensitivity classification of the HMC232C8?

The HMC232C8 is rated HBM Class 1A (≥250 V), indicating high susceptibility to electrostatic discharge. Handling requires strict adherence to ESD protocols: grounded workstations, wrist straps, conductive foam packaging, and ionized air environments. This classification is confirmed in the Absolute Maximum Ratings table of the official HMC232C8 datasheet.