Analog Devices Inc./Maxim Integrated MAX4544EUA

Overview

The MAX4544EUA from Maxim Integrated is a precision single-pole/double-throw (SPDT) analog switch operating from a single +2.7V to +12V supply, delivering 60Ω max on-resistance, 5pC max charge injection, and guaranteed break-before-make switching - ideal for audio/video routing and battery-powered instrumentation requiring low leakage and fast settling.

For engineers reviewing the MAX4544EUA datasheet, MAX4544EUA pinout, MAX4544EUA application, or MAX4544EUA equivalent, key selection criteria include its SOT23-6 package, -40°C to +85°C temperature grade, SPDT topology with NC/NO/COM terminals, and compatibility with +3.3V/+5V logic in portable medical and test equipment signal paths.

Technical Context

The MAX4544EUA implements a CMOS-based SPDT analog switch architecture with TTL/CMOS-compatible digital control inputs and bidirectional analog signal handling across the full V+ to GND range. Its internal structure guarantees break-before-make timing (tD = 2ns min, 10ns max at +25°C) to prevent signal shorting during state transitions.

It operates with rail-to-rail analog signal capability up to V+, supports ≤10mA continuous current per terminal, and maintains low on-resistance flatness (6Ω max) and channel matching (2Ω max) over temperature - critical for precision multiplexing in data acquisition systems.

Key Specifications

Pinout & Package

SOT23-6 package: 2.9mm × 2.8mm footprint, 0.95mm pitch, exposed pad (not connected), rated for 571mW power dissipation at +70°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4544EUT-T, the MAX4544EUA offers identical functionality in tube packaging for prototyping and low-volume builds; versus ADG1419BRMZ, it trades slightly higher R_ON for guaranteed break-before-make, single-supply operation, and lower system-level design overhead.

Availability

MAX4544EUA is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data loggers, and test equipment signal routing requiring stable component supply across industrial temperature ranges.

Supply support for MAX4544EUA 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX4541–MAX4544 family delivers low-voltage, single-supply SPST/SPDT analog switches optimized for battery-operated systems where low leakage, fast switching, and rail-to-rail signal handling are essential.

FAQ

What is the maximum analog signal voltage range supported by the MAX4544EUA?

The MAX4544EUA supports analog signals from GND to V+, with absolute maximum ratings allowing V+ up to +13V and analog pins to tolerate V+ + 0.3V. At +5V supply, this yields a 0V to +5V signal range; at +12V supply, it extends to 0V to +12V - enabling direct interfacing with unipolar sensors and DACs without external level-shifting circuitry. The MAX4544EUA maintains low R_ON flatness across this full range.

Does the MAX4544EUA require dual supplies or special power sequencing?

No, the MAX4544EUA operates from a single +2.7V to +12V supply and does not require dual rails. However, proper power sequencing is recommended: apply V+ before analog signals or logic inputs to avoid latch-up. If sequencing cannot be guaranteed, external blocking diodes may be added - though this reduces analog range by ~0.7V and shifts logic thresholds. The MAX4544EUA's internal protection eliminates need for external ESD components.

Is the MAX4544EUA pin-compatible with older Maxim analog switches?

Yes, the MAX4544EUA is pin-compatible with the MAX323, MAX324, and MAX325 SPDT analog switches in the same SOT23-6 package. This allows drop-in replacement in legacy designs without PCB modification, preserving existing layout and bill-of-materials while upgrading to lower leakage (100pA vs. 500pA), faster switching (35ns vs. 120ns), and guaranteed break-before-make - all critical for modern portable instrumentation using the MAX4544EUA.

What is the guaranteed break-before-make timing specification for the MAX4544EUA?

The MAX4544EUA guarantees break-before-make operation with a minimum delay (tD) of 2ns and maximum of 10ns at +25°C under RL = 300Ω and CL = 35pF conditions. This ensures the NC path opens before the NO path closes, preventing momentary short-circuits between signal sources - a critical safety feature in multiplexer applications such as ECG lead selection or reference voltage routing where cross-conduction could corrupt measurements or damage downstream circuitry. The MAX4544EUA specifies this behavior across its full -40°C to +85°C operating range.

How does the MAX4544EUA perform at 3.3V supply voltage?

At +3.3V supply, the MAX4544EUA delivers 125Ω max on-resistance (typ 75Ω), 80ns to 400ns turn-on time, and 50ns to 175ns turn-off time - fully functional but with higher R_ON and slower switching than at +5V. Charge injection remains 5pC max, and leakage stays below 10nA at +85°C. Its TTL/CMOS inputs are rail-to-rail compatible, so logic high can be driven to +3.3V directly. The MAX4544EUA thus supports both 3.3V and 5V systems without external level shifters, making it suitable for mixed-voltage portable designs.