Analog Devices Inc./Maxim Integrated MAX4711EUE+

Overview

MAX4711EUE+ from Maxim Integrated is a fault-protected, quad SPST analog switch with normally closed (NC) configuration, operating from single +2.7V to +11V or dual ±2.7V to ±5.5V supplies. 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 signal routing in battery-powered test equipment and industrial control systems where input overvoltage transients occur.

For engineers reviewing the MAX4711EUE+ datasheet, MAX4711EUE+ pinout, MAX4711EUE+ application, or MAX4711EUE+ equivalent, key selection criteria include its rail-to-rail signal handling, guaranteed on-resistance flatness, fault-clamp behavior during overvoltage events, TTL/CMOS logic compatibility, and -40°C to +85°C extended temperature rating in 16-pin TSSOP package.

Technical Context

The MAX4711EUE+ integrates parallel N- and P-channel FETs per channel to achieve low R_ON and rail-to-rail conduction. Two comparators continuously monitor NO_/NC_ voltage against V+ and V−; a ±150mV excursion triggers fault shutdown and clamping via dedicated clamp FETs (P2/N2), limiting COM_ to the appropriate supply rail.

Fault response is asymmetric: positive faults activate P2 to source current from V+, negative faults activate N2 to sink to V−, each capable of ±15mA. During power-off, NO_/NC_ remain high-impedance up to ±12V, while COM_ retains no fault protection and must stay within V+/V− rails to avoid ESD diode conduction.

Key Specifications

Pinout & Package

MAX4711EUE+ uses a 16-pin TSSOP package (JEDEC MO-153, 5mm × 4.4mm, 0.65mm pitch) with exposed pad for thermal dissipation. 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 MAX4712EUE+, the MAX4711EUE+ provides inherent fail-safe continuity in power-loss scenarios; compared with ADG1412BRUZ, it trades 1.8Ω R_ON for integrated ±12V fault resilience-reducing system-level protection complexity in uncontrolled signal environments.

Availability

MAX4711EUE+ is available at Aetrix Electronics and suitable for automated test equipment, battery-operated data loggers, redundant avionics signal routing, and industrial process controller I/O modules requiring stable component supply across extended temperature ranges and fault-prone signal paths.

Supply support for MAX4711EUE+ 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 MAX4711EUE+ belongs to Maxim's fault-protected analog switch family, engineered specifically for signal integrity and system reliability in environments where field wiring errors, ESD, or power-supply transients threaten downstream circuitry.

FAQ

What is the maximum fault voltage the MAX4711EUE+ can withstand on its NC pins with power removed?

The MAX4711EUE+ sustains ±12V on its NC1–NC4 pins with V+ and V− unpowered. This is specified in the Absolute Maximum Ratings table and confirmed in the Fault-Protection Voltage and Power Off section. The device achieves this via internal high-impedance isolation of the NC pins during power-off, eliminating need for external protection components in standby or maintenance states. This capability applies identically across all temperature grades including the -40°C to +85°C range of the MAX4711EUE+.

Does the MAX4711EUE+ support single-supply operation, and what is the minimum valid supply voltage?

Yes, the MAX4711EUE+ supports single-supply operation with V− tied to GND. Its minimum valid supply voltage is +2.7V, verified in the Electrical Characteristics tables for +3V Single Supply operation. At +2.7V, it maintains functional logic thresholds (VIH = +2.0V, VIL = +0.6V), 100Ω max R_ON, and full fault-protection behavior. Operation below +2.7V is not characterized or guaranteed, and may result in incomplete switching or loss of fault detection.

How does the fault-clamp behavior of the MAX4711EUE+ affect the COM pin during an overvoltage event?

During a fault, the MAX4711EUE+ clamps the COM pin to the same-polarity supply rail (V+ for positive faults, V− for negative faults) via internal clamp FETs (P2 or N2). This limits COM voltage to safe levels regardless of NC input overvoltage. However, COM itself is not fault-protected: if driven beyond V+/V− by external sources, ESD diodes conduct, risking damage. Therefore, COM must be buffered or isolated from uncontrolled voltages - the clamp only acts when the fault originates at NC.

Is the MAX4711EUE+ pin-compatible with non-fault-protected switches like the MAX391?

Yes, the MAX4711EUE+ has identical pinout and footprint to the MAX391/MAX392/MAX393 series, as explicitly stated in the Features list and Pin Compatibility section. This allows direct PCB replacement in existing designs. However, caution is required: only the NC pins (not COM) are fault-protected, and the internal fault logic alters behavior during overvoltage - so system-level validation of fault response is essential even with mechanical compatibility.

What is the typical on-resistance flatness of the MAX4711EUE+ across its signal range, and why does it matter?

The MAX4711EUE+ guarantees ≤5Ω on-resistance flatness (R_FLAT) over the full signal range (V− to V+) at +25°C, measured as the peak-to-peak variation in R_ON. This tight flatness ensures minimal harmonic distortion and amplitude error when switching audio, sensor, or precision analog signals - especially critical in instrumentation-grade multiplexers where gain linearity directly impacts measurement accuracy and THD performance.