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 avionics systems where input overvoltage transients are common.

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 over full signal range, fault-clamped COM_ output behavior during overvoltage events, TTL/CMOS logic compatibility, and -40°C to +85°C industrial 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−; exceeding either rail by ~150mV triggers fault mode, turning off signal FETs and activating clamp FETs to limit COM_ to the appropriate supply rail.

Fault response is asymmetric: positive faults engage P2 clamp sourcing from V+, negative faults engage N2 clamp sinking to V−. During fault, NO_/NC_ becomes high-impedance regardless of logic state, and COM_ leakage remains ≤±20nA while clamping current reaches up to ±11mA at +5V supply - critical for protecting downstream ADCs or multiplexers.

Key Specifications

Pinout & Package

MAX4711EUE is housed in a 16-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch), thermally optimized for surface-mount assembly and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4711CUE and MAX391ESE, the MAX4711EUE uniquely combines industrial temperature range, integrated fault protection, and rail-to-rail performance - eliminating external components while ensuring reliability in uncontrolled signal environments.

Availability

MAX4711EUE is available at Aetrix Electronics and suitable for battery-operated systems, avionics signal routing, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.

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, medical, and communications applications.

The MAX4711EUE belongs to Maxim's fault-protected analog switch family, engineered specifically for signal integrity preservation in systems exposed to unpredictable voltage transients - such as portable instrumentation, aerospace sensors, and redundant control architectures.

FAQ

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

The MAX4711EUE provides ±12V fault protection on NC_ pins even with all supplies disconnected. This allows safe connection to unpowered circuits or hot-swapped modules without risk of latch-up or permanent damage - a key advantage over standard analog switches like the MAX391 series. The MAX4711EUE achieves this via internal high-impedance fault detection circuitry that remains active without bias.

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

Yes, the MAX4711EUE operates from a single +2.7V to +11V supply with V− tied to GND. At +2.7V, it maintains functional logic thresholds (VIH = +2.0V, VIL = +0.6V) and delivers ≤100Ω on-resistance - making it viable for ultra-low-power 3V systems such as coin-cell IoT sensors. The MAX4711EUE retains full fault-protection capability across this entire range.

How does the MAX4711EUE behave during a positive overvoltage fault on an NC pin?

When an NC_ pin exceeds V+ by ~150mV, the MAX4711EUE disables its main N/P-FET pass transistors and activates the P2 clamp FET, sourcing current from V+ to COM_ to hold the output at V+. This limits voltage excursion, prevents downstream damage, and maintains high impedance at the NC_ terminal regardless of logic state. The MAX4711EUE recovers automatically once the fault clears.

Is the COM pin of the MAX4711EUE fault-protected, and what happens if it exceeds the supply rails?

No, the COM_ pins of the MAX4711EUE are not fault-protected. Exceeding V+ or V− on COM_ forward-biases internal ESD diodes, potentially causing destructive current flow if not externally limited. The MAX4711EUE datasheet explicitly warns against applying overvoltage to COM_; it must remain strictly within the supply rails - unlike NC_/NO_ pins, which are hardened for ±12V transients.

Can the MAX4711EUE replace the MAX391 in an existing design without layout changes?

Yes - the MAX4711EUE uses identical pinout and footprint as the MAX391/MAX392/MAX393 family in 16-pin TSSOP, SO, and DIP packages. However, because only NC_/NO_ pins are fault-protected (not COM_), designers must verify that overvoltage risks exist only on those inputs. The MAX4711EUE adds protection without requiring PCB revision, but system-level grounding and signal routing must still respect its COM_ voltage limits.