Microchip Technology MD0105K6-G-M932

Overview

MD0105K6-G-M932 from Microchip Technology is a 4-channel high-voltage T/R (transmit-and-receive) protection switch designed for ultrasound receiver front-ends. It functions as a normally closed, voltage-triggered switch with 15Ω typical on-resistance, ±130V differential withstand capability, and ±2V trip threshold-enabling isolation of low-noise receivers from high-voltage transmit pulses in medical imaging systems.

For engineers reviewing the MD0105K6-G-M932 datasheet, MD0105K6-G-M932 pinout, MD0105K6-G-M932 application, or MD0105K6-G-M932 equivalent, key selection criteria include its self-powered operation, electrically isolated channels, sub-20 ns switching speed, and DFN package compatibility with high-density medical transducer array layouts.

Technical Context

The MD0105K6-G-M932 implements an integrated voltage-sensing control circuit that monitors differential voltage across each A–B channel pair. When VA–B exceeds ±2V, internal logic opens the switch within ≤20 ns, limiting current to ±200 µA while blocking up to ±130V.

Each of the four independent channels operates without external bias or supply rails, relying solely on signal-level voltage thresholds for automatic mode transition between low-loss receive (15Ω RSW, 21 pF CSW(ON)) and high-isolation transmit (15 pF CSW(OFF) at 25V) states.

Key Specifications

Pinout & Package

MD0105K6-G-M932 is housed in an 18-lead 5 mm × 5 mm VDFN (K6) package with exposed center thermal pad connected to ground. Pin layout follows top-view numbering with alternating A/B terminals and no-connect (NC) pins for mechanical symmetry and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MD0105K6-G-M932, the MD0104K6-G-M932 offers identical per-channel performance in a single-channel format ideal for prototyping or channel expansion, while TS3USB30E serves entirely different low-voltage digital domains and cannot substitute for high-voltage analog protection.

Availability

MD0105K6-G-M932 is available at Aetrix Electronics and suitable for medical imaging systems, non-destructive testing instruments, and high-reliability data acquisition modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MD0105K6-G-M932 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and mixed-signal ICs for industrial, automotive, and medical applications.

The MD0105K6-G-M932 belongs to Microchip's high-voltage protection switch product line, engineered specifically for ultrasound and NDT systems requiring autonomous, supply-free T/R switching with robust voltage standoff and fast transient response.

FAQ

What is the primary function of the MD0105K6-G-M932 in ultrasound systems?

The MD0105K6-G-M932 acts as a self-powered, voltage-triggered T/R switch that isolates low-noise receiver circuits from high-voltage transmit pulses. Its ±2V trip threshold and <20 ns turn-off time ensure precise timing control, while its ±130V differential withstand rating allows direct integration with piezoelectric transducers-making MD0105K6-G-M932 essential for protecting sensitive analog front-ends in real-time medical imaging.

Does the MD0105K6-G-M932 require external power or control signals to operate?

No, the MD0105K6-G-M932 operates autonomously without external supplies or logic control. Its internal sensing circuit uses the signal voltage itself to trigger switching-turning off when VA–B exceeds ±2V and returning to low-resistance conduction once voltage drops below threshold. This self-powered behavior simplifies probe design and eliminates dependency on timing-critical control lines, a core advantage of MD0105K6-G-M932 in space-constrained ultrasound applications.

What is the significance of the "K6" and "M932" suffixes in MD0105K6-G-M932?

The "K6" denotes the 18-lead 5 mm × 5 mm VDFN package type, while "M932" specifies the media format: 3300 units per reel. The "G" indicates lead-free/RoHS-compliant finish. Together, MD0105K6-G-M932 identifies a fully qualified, production-ready variant optimized for automated SMT assembly and long-term supply stability-distinct from tray-packaged versions like MD0105K6-G.

Can the MD0105K6-G-M932 be used outside of ultrasound applications?

Yes-the MD0105K6-G-M932 is validated for use as a resettable high-voltage fuse in power line protection, output short-circuit safeguarding, and data acquisition instrument front-end shielding. Its ±130V withstand, 15Ω on-resistance, and automatic recovery make MD0105K6-G-M932 suitable for any system requiring passive, supply-free overvoltage isolation without sacrificing signal fidelity or bandwidth.

How does thermal management work for the MD0105K6-G-M932 in continuous operation?

The MD0105K6-G-M932 features an exposed center thermal pad designed for direct soldering to a PCB ground plane. With θJA = 40°C/W on a standard 25 mm × 25 mm FR4 board, it safely dissipates up to 1.6W. Proper pad layout-including ≥4 thermal vias connected to inner ground layers-is critical to maintain junction temperature below +125°C under worst-case load, ensuring long-term reliability of MD0105K6-G-M932 in high-duty-cycle applications.