Analog Devices Inc./Maxim Integrated MAX4712CUE

Overview

MAX4712CUE from Maxim Integrated is a fault-protected, quad SPST analog switch with four normally open (NO) channels, rail-to-rail signal handling, 25Ω max on-resistance at +25°C, ±12V fault protection with power off, and operation from +2.7V to +11V single supply or ±2.7V to ±5.5V dual supplies. It enables robust signal routing in battery-powered test equipment where input overvoltage transients must not damage downstream circuitry.

For engineers reviewing the MAX4712CUE datasheet, MAX4712CUE pinout, MAX4712CUE application, or MAX4712CUE equivalent, key selection criteria include fault-protection voltage limits under powered/off conditions, on-resistance match across channels (≤1Ω max), switching speed (tON < 125ns), rail-to-rail analog range, and compatibility with TTL/CMOS logic inputs.

Technical Context

The MAX4712CUE uses parallel N- and P-channel FETs per channel to achieve low RON and flat on-resistance over signal range. Its dual comparators continuously monitor NO_ pins against V+ and V−; exceeding either rail by ~150mV triggers fault response-turning off the main FETs and enabling clamp FETs to limit COM_ to the appropriate supply rail.

Fault protection remains active with power removed: NO_ pins become virtual open circuits up to ±12V, while COM_ pins remain unprotected and require external voltage limiting. The device supports asymmetric dual supplies (|V+ − V−| ≤ 11V) and features guaranteed logic thresholds (VIH = 2.4V, VIL = 0.8V) for TTL/CMOS compatibility at ≥+4.5V supply.

Key Specifications

Pinout & Package

MAX4712CUE is housed in a 16-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin 12 is no-connect (N.C.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX392CUE and ADG1412BRUZ, the MAX4712CUE uniquely balances industrial-grade fault tolerance (±12V power-off), low RON match (≤1Ω), and pin compatibility-making it optimal for retrofitting legacy test gear while maintaining signal integrity and safety compliance.

Availability

MAX4712CUE is available at Aetrix Electronics and suitable for battery-operated test equipment, redundant avionics signal routing, and industrial data-acquisition modules requiring stable component supply across extended temperature ranges and long 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.

The MAX4712CUE belongs to Maxim's fault-protected analog switch product line, engineered specifically for systems where input overvoltage events-during operation or power loss-must not compromise downstream signal chain integrity.

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_/NC_ pins even when all supplies are disconnected. This is achieved via internal high-impedance fault-sensing circuitry that isolates the pins without drawing current. The specification is tested and guaranteed across the full commercial temperature range (0°C to +70°C) and applies regardless of V+ or V− voltage levels, including 0V. Exceeding ±12V may cause permanent damage.

Does the MAX4712CUE support single-supply operation, and what is the minimum valid supply voltage?

Yes, the MAX4712CUE supports true single-supply operation with V− connected to GND. The valid supply range is +2.7V to +11V on V+, with full functionality-including fault protection, rail-to-rail signal handling, and guaranteed logic thresholds-maintained across this range. At +2.7V, logic thresholds shift to VIH = 2.0V and VIL = 0.6V to ensure reliable switching, and on-resistance increases to 100Ω max (typical 54Ω).

Are the COM pins of the MAX4712CUE fault-protected, and what happens if they exceed the supply rails?

No, the COM pins of the MAX4712CUE are not fault-protected. They connect directly to internal ESD diodes tied to V+ and V−. If a COM pin voltage exceeds V+ or falls below V− by more than ~0.7V, the corresponding diode conducts, potentially drawing excessive current and damaging the device. Therefore, external clamping or limiting is mandatory on all COM connections-unlike NO_/NC_ pins, which self-protect up to ±12V.

How does the MAX4712CUE's fault recovery time affect system timing in real-time applications?

The MAX4712CUE exhibits a typical 700ns fault recovery time (dual supply) or 500µs (single +5V supply) after an overvoltage event ends. During this interval, the COM output remains clamped and does not resume normal signal pass-through. For real-time systems requiring sub-microsecond response-such as high-speed data acquisition-the recovery delay must be accounted for in timing budgets; it is not programmable or adjustable and varies with load capacitance and supply configuration.

Is the MAX4712CUE pin-compatible with non-fault-protected analog switches, and what design cautions apply?

Yes, the MAX4712CUE shares identical pinout and footprint with the MAX392 family, enabling direct PCB replacement. However, caution is required: only NO_/NC_ pins are fault-protected-COM pins remain vulnerable and must retain original voltage limiting. Also, the fault-protection circuitry draws slightly higher supply current (75µA vs. 60µA for MAX392), so power budget validation is recommended in ultra-low-power designs.