Analog Devices Inc. HMC182S14ETR

Overview

HMC182S14ETR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SP4T non-reflective RF switch operating from DC to 2 GHz, featuring 0.8 dB typical insertion loss, 45 dB isolation at 1 GHz, and integrated 2:4 decoder requiring only two control lines. It is used in antenna diversity and switched filter bank applications in 800–1000 MHz basestations.

For engineers reviewing the HMC182S14ETR datasheet, HMC182S14ETR pinout, HMC182S14ETR application, or HMC182S14ETR equivalent, key selection criteria include its -5 V negative bias operation, 14-lead SOIC package, non-reflective "off-state" return loss ≥17 dB, and compatibility with TTL-level control when Vee = -5 V.

Technical Context

The HMC182S14ETR implements a monolithic GaAs-based SP4T architecture with on-chip 2:4 decoder logic, eliminating external decoding circuitry. Its non-reflective design terminates all unused RF paths to 50 Ω, ensuring stable VSWR across all off states.

It operates with dual-rail negative control: A/B inputs accept 0 V (low) or -5 V (high), while Vee = -5 V supplies bias current (4 mA typ). Switching is characterized by 25 ns rise/fall time and 50 ns ON/OFF delay across DC–2 GHz.

Key Specifications

Pinout & Package

Package: 14-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, matte tin-plated leadframe, MSL1 rating, max reflow 260 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC165S14 and HMC241QS16, the HMC182S14ETR uniquely combines decoder integration, non-reflective termination, and SOIC packaging - optimizing board area and RF stability in cost-sensitive basestation front-ends.

Availability

HMC182S14ETR is available at Aetrix Electronics and suitable for antenna diversity systems, switched filter banks, TDD transmit/receive path selection, and programmable gain control blocks requiring stable component supply and long-term lifecycle support.

Supply support for HMC182S14ETR 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, SiGe, and RF SOI solutions for communications and defense.

The HMC182S14ETR belongs to Hittite's legacy SP4T MMIC switch family, designed specifically for cost-sensitive, high-isolation, non-reflective RF routing in cellular infrastructure and broadband wireless equipment.

FAQ

What is the recommended bias voltage for HMC182S14ETR?

The HMC182S14ETR requires Vee = -5.0 Vdc ±10% applied to Pin 10. This supplies the internal GaAs FETs and 2:4 decoder. Typical bias current is 4.0 mA, with maximum 7.0 mA. Deviation beyond ±10% risks degraded isolation and increased insertion loss, especially above 1 GHz.

Can HMC182S14ETR be driven directly by standard TTL logic?

Yes - HMC182S14ETR accepts TTL logic levels when Vee = -5 V is supplied to both the switch (Pin 10) and the driving logic gate's Vee pin. Control inputs A (Pin 11) and B (Pin 12) interpret 0 V as logic low and -5 V as logic high, matching standard HCT logic thresholds.

What is the thermal resistance of HMC182S14ETR and how does it affect reliability?

HMC182S14ETR has θ_JA = 123 °C/W for the insertion loss path and 260 °C/W for the terminated path. At 24 dBm input power and +85 °C ambient, junction temperature remains below 150 °C - within absolute maximum rating - provided all 12 ground pins are soldered to a solid RF ground plane.

Does HMC182S14ETR require external termination resistors?

No - HMC182S14ETR is a non-reflective SP4T switch with internal 50 Ω terminations on all three unselected RF ports (RF1–RF4). External resistors are unnecessary, simplifying layout and improving repeatability versus discrete termination solutions.

What is the maximum RF input power HMC182S14ETR can handle?

HMC182S14ETR supports +30 dBm maximum RF input power above 500 MHz and +27 dBm below 500 MHz. Exceeding these limits risks permanent damage to GaAs FETs. For continuous-wave operation near maximum rating, ensure PCB thermal vias and ground copper area meet datasheet layout guidelines.