Analog Devices Inc./Maxim Integrated MAX4544EUT-T

Overview

MAX4544EUT-T from Maxim Integrated is a single-pole/double-throw (SPDT) analog switch IC designed for precision signal routing in low-voltage, single-supply systems. It operates from +2.7V to +12V, delivers 60Ω max on-resistance, 5pC max charge injection, and guarantees break-before-make switching - enabling reliable channel isolation in audio, test equipment, and portable instrumentation.

For engineers reviewing the MAX4544EUT-T datasheet, MAX4544EUT-T pinout, MAX4544EUT-T application, or MAX4544EUT-T equivalent, key selection criteria include its SOT23-6 package footprint, guaranteed break-before-make timing (2ns min), ±10mA continuous current rating, and compatibility with +3.3V/+5V DAC/ADC interface circuits requiring low leakage (<10nA at +85°C) and fast switching (tON = 35ns typ).

Technical Context

The MAX4544EUT-T implements a CMOS transmission-gate architecture optimized for bidirectional analog signal switching across the full supply rail (GND to V+). Its logic inputs are TTL/CMOS-compatible and support rail-to-rail drive, ensuring robust control even at +3.3V or +12V supplies.

Break-before-make operation is hardware-guaranteed (not software-configured), with tD = 2ns min delay between channel disconnect and reconnect - critical for preventing momentary short-circuits in multiplexed sensor or audio paths. The device features internal ESD protection (>2000V per Method 3015.7) and operates over –40°C to +85°C.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX323ESA+ and TMUX6219DSGR, the MAX4544EUT-T uniquely balances wide supply range (+2.7V to +12V), guaranteed break-before-make, and industrial temperature rating (–40°C to +85°C) - making it the preferred choice for ruggedized test, military radio, and mixed-voltage embedded systems.

Availability

MAX4544EUT-T is available at Aetrix Electronics and suitable for battery-operated systems, test equipment, and communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4544EUT-T 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 industrial, automotive, and communications markets.

The MAX4541–MAX4544 family targets low-voltage, single-supply analog signal routing - emphasizing low leakage, rail-to-rail operation, and guaranteed switching behavior for portable and high-reliability instrumentation.

FAQ

What is the maximum supply voltage rating for the MAX4544EUT-T?

The MAX4544EUT-T has an absolute maximum supply voltage (V+) of +13V, with recommended operating range from +2.7V to +12V. Exceeding +13V risks permanent damage. The device's internal protection diodes clamp analog inputs to V+ + 0.3V, so maintaining V+ within specification ensures safe operation across all signal conditions. This rating is confirmed in the Absolute Maximum Ratings table of the official MAX4544 datasheet.

Does the MAX4544EUT-T support rail-to-rail analog signal switching?

Yes, the MAX4544EUT-T supports rail-to-rail analog signal switching from GND to V+. Its analog terminals (COM, NO, NC) operate over the full supply range without external biasing, enabling direct connection to unbuffered sensors, DAC outputs, and ADC inputs. This capability is verified in the "Analog Signal Range" parameter (0V to V+) and confirmed by typical operating curves showing stable R_ON across the entire voltage span.

Is break-before-make timing guaranteed for the MAX4544EUT-T?

Yes, break-before-make timing is hardware-guaranteed for the MAX4544EUT-T, with a minimum delay (t_D) of 2ns. This is explicitly stated in the Features list and Electrical Characteristics table. Unlike software-controlled or timing-dependent alternatives, this guarantee is built into the internal logic and applies across the full temperature and supply range - critical for preventing momentary shorts in SPDT configurations.

What is the thermal performance of the MAX4544EUT-T in its SOT23-6 package?

The MAX4544EUT-T in SOT23-6 has a power dissipation limit of 571mW at +70°C, derating by 7.1mW/°C above that temperature. At +85°C, usable power drops to ~465mW. This is specified in the Absolute Maximum Ratings section and aligns with the package's thermal resistance (θ_JA ≈ 141°C/W). For continuous operation near thermal limits, PCB copper area under the exposed pad improves heat transfer - though the datasheet notes the pad is not electrically connected.

Can the MAX4544EUT-T replace the MAX323 in existing designs?

Yes, the MAX4544EUT-T is pin-compatible with the MAX323 series and listed as such in the datasheet Features section. However, while pinout and basic function match, the MAX4544EUT-T offers superior specs: lower R_ON (60Ω vs. 100Ω max), guaranteed break-before-make, and tighter charge injection (5pC vs. 10pC). Designers should verify timing margins and leakage requirements, but no PCB changes are needed for drop-in replacement in most +5V applications.