Analog Devices Inc./Maxim Integrated MAX4712CUE+

Overview

MAX4712CUE+ from Maxim Integrated is a fault-protected, quad SPST analog switch with normally open (NO) configuration, designed for signal routing in low-voltage systems. It delivers 25Ω max on-resistance at +25°C, <125ns turn-on time, and ±12V fault protection on NO/NC pins with power off-enabling robust operation in battery-powered test equipment and industrial I/O modules.

For engineers reviewing the MAX4712CUE+ datasheet, MAX4712CUE+ pinout, MAX4712CUE+ application, or MAX4712CUE+ equivalent, key selection criteria include its rail-to-rail signal handling (±5.5V dual / +11V single supply), guaranteed on-resistance match (≤1Ω), fault-clamp behavior during overvoltage events, and pin compatibility with MAX392.

Technical Context

The MAX4712CUE+ integrates parallel N- and P-channel FETs per channel to achieve low R_ON and flat on-resistance across the signal range. Its dual-comparator fault-sensing architecture detects input excursions beyond V+ or V− by ~150mV, disabling the main switch and activating clamp FETs to limit COM output to the appropriate supply rail.

During fault conditions, the NO pins become high-impedance regardless of logic state; when ON, COM is actively clamped to V+ (positive fault) or V− (negative fault) with up to ±15mA sourcing/sinking capability. The device operates identically across single (+2.7V to +11V) and dual (±2.7V to ±5.5V) supplies, with TTL/CMOS-compatible logic thresholds.

Key Specifications

Pinout & Package

MAX4712CUE+ is housed in a 16-pin TSSOP package (3.1mm × 5.1mm, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to +70°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX392CUE+, the MAX4712CUE+ adds integrated fault protection without layout changes; versus ADG1412BRUZ, it offers identical 16-pin TSSOP compatibility but trades lower R_ON for broader supply flexibility and simpler logic drive requirements.

Availability

MAX4712CUE+ is available at Aetrix Electronics and suitable for battery-operated test equipment, industrial process I/O modules, and avionics redundancy switching requiring stable component supply across extended production lifecycles.

Supply support for MAX4712CUE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4712CUE+ belongs to Maxim's fault-protected analog switch product line, engineered to replace unprotected CMOS switches in environments prone to voltage transients, ESD, or uncontrolled signal sources.

FAQ

What is the maximum fault voltage the MAX4712CUE+ can withstand on its NO pins with power removed?

The MAX4712CUE+ guarantees ±12V fault protection on NO pins even when V+ and V− are at 0V. This is achieved via internal high-impedance isolation and ESD structures that remain active without bias. The specification is validated per Absolute Maximum Ratings and applies across the full commercial temperature range (0°C to +70°C). This capability makes the MAX4712CUE+ suitable for hot-plug interfaces and maintenance scenarios where signal lines may be energized before power-up.

Does the MAX4712CUE+ support rail-to-rail analog signal switching with a +3.3V single supply?

Yes, the MAX4712CUE+ supports rail-to-rail operation from V− (GND) to V+ (+3.3V) in single-supply mode. At +3.3V, the typical on-resistance is 75Ω (max 100Ω), and the fault-free signal range spans 0V to +3.3V. The device maintains TTL/CMOS logic compatibility with VIH = 2.0V and VIL = 0.6V at this supply level. This enables direct use in 3.3V microcontroller-based data loggers and IoT sensor nodes without level translation.

How does the fault recovery time of the MAX4712CUE+ affect system timing in high-speed multiplexing?

The MAX4712CUE+ exhibits a 700ns fault recovery time (dual supply) or 500µs (single +5V supply) after an overvoltage event subsides. During this interval, the COM output remains clamped and does not resume normal switching until recovery completes. For multiplexing rates below 1kHz, this delay is negligible; however, in >1MHz sampling systems, fault events must be avoided via front-end filtering or signal conditioning, as recovery is not interruptible or programmable. The MAX4712CUE+ datasheet specifies this parameter under defined load conditions (R_COM = 1kΩ).

Can the COM pins of the MAX4712CUE+ be driven beyond the supply rails?

No, the COM pins of the MAX4712CUE+ are not fault-protected. Exceeding V+ or falling below V− on any COM pin forward-biases internal ESD diodes, risking permanent damage if current exceeds ±40mA continuous or ±70mA peak. The Absolute Maximum Ratings specify COM voltage limits as (V− − 0.3V) to (V+ + 0.3V). System design must ensure COM signals remain strictly within the supply rails-unlike NO/NC pins, which tolerate ±12V transients. This asymmetry defines the MAX4712CUE+'s intended signal flow direction: NO → COM, not COM → NO.

Is the MAX4712CUE+ pin-compatible with the MAX4711CUE+ and MAX4713CUE+?

Yes, the MAX4712CUE+, MAX4711CUE+, and MAX4713CUE+ share identical 16-pin TSSOP footprints and pin assignments. The functional difference lies solely in switch configuration: MAX4711 is quad NC, MAX4712 is quad NO, and MAX4713 is dual NO/dual NC. This allows board-level reuse across variants-e.g., swapping MAX4712CUE+ for MAX4713CUE+ requires only firmware logic updates to accommodate mixed NO/NC behavior, with no hardware modification.