Analog Devices Inc./Maxim Integrated MAX4711EUE+T

Overview

MAX4711EUE+T 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+T datasheet, MAX4711EUE+T pinout, MAX4711EUE+T application, or MAX4711EUE+T equivalent, key selection criteria include its rail-to-rail signal handling, guaranteed on-resistance flatness over signal range, fault-clamp 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+T implements dual-FET (N+P channel) parallel switching architecture per channel to achieve low R_ON and rail-to-rail conduction. Its fault protection relies on dedicated comparators monitoring NO_/NC_ voltage against V+ and V−, triggering clamp FETs (P2/N2) to limit COM output to supply rails when input exceeds V+ − 0.15V or V− + 0.15V.

During fault conditions, the affected NO_/NC_ pin becomes high-impedance regardless of logic state, while COM remains actively clamped - unlike conventional switches that latch or draw excessive current. The device maintains full functionality with asymmetric dual supplies (e.g., +5V/−3V), provided |V+ − V−| ≤ 11V.

Key Specifications

Pinout & Package

MAX4711EUE+T is housed in a 16-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant, 5mm × 4.4mm footprint, and exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4712EUE+T and ADG1411BRUZ, the MAX4711EUE+T uniquely combines NC default state, full ±12V fault tolerance with power removed, and industrial temperature range - making it irreplaceable in safety-critical, battery-backed, or field-serviceable systems where unpowered overvoltage exposure is unavoidable.

Availability

MAX4711EUE+T is available at Aetrix Electronics and suitable for battery-operated test equipment, avionics signal routing, and industrial process control I/O requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4711EUE+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 demanding industrial, automotive, and communications applications.

The MAX4711EUE+T belongs to Maxim's fault-protected analog switch product line, engineered specifically for signal integrity and system resilience in environments prone to input overvoltage, power cycling, and EMI - such as portable instrumentation and aerospace subsystems.

FAQ

What is the maximum fault voltage the MAX4711EUE+T can withstand on its NO_/NC_ pins with power removed?

The MAX4711EUE+T provides ±12V fault protection on NO_ and NC_ pins even when all supplies (V+ and V−) are disconnected. This is explicitly specified in the Absolute Maximum Ratings table and confirmed in the Fault-Protection Voltage and Power Off section of the datasheet. The device achieves this via internal high-impedance isolation of the NO_/NC_ terminals during power-off, preventing current flow beyond ±5µA leakage at ±12V.

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

Yes, the MAX4711EUE+T supports single-supply operation with V− tied to GND. Its valid single-supply range is +2.7V to +11V, as stated in both the General Description and ELECTRICAL CHARACTERISTICS-+3V Single Supply sections. At +2.7V, it maintains functional logic thresholds (VIH = +2.0V, VIL = +0.6V) and delivers ≤100Ω R_ON, enabling use in ultra-low-voltage battery systems like coin-cell-powered sensors.

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

No, the COM pins on the MAX4711EUE+T are not fault-protected. As noted in the datasheet's Pin Description and Detailed Description sections, COM pins have internal ESD diodes to V+ and V−. If a COM pin voltage exceeds V+ or falls below V− by more than ~0.6V, forward conduction occurs - potentially damaging the device if current exceeds ±40mA absolute maximum. External clamping is required for COM-side overvoltage.

How does the MAX4711EUE+T behave during a positive fault condition - for example, when NC1 is driven to +12V while V+ = +5V and V− = 0V?

When NC1 exceeds V+ by ~150mV (i.e., >+5.15V), the internal high-fault comparator triggers, turning off the N1/P1 pass FETs and activating clamp FET P2. This pulls COM1 to V+ (+5V), limiting output voltage and sourcing up to ~15mA. NC1 becomes high-impedance, isolating the fault. Recovery occurs within ~500µs after the input returns within rails - verified in the +5V Single Supply Electrical Characteristics table under +Fault Recovery Time.

Can the MAX4711EUE+T be used as a direct replacement for the MAX391 in an existing design?

Yes - the MAX4711EUE+T is explicitly pin-compatible with the MAX391 (and MAX392/MAX393), sharing identical 16-pin TSSOP pinout and logic-level mapping. However, because only NO_/NC_ pins are fault-protected (not COM), designers must ensure COM traces are never exposed to overvoltage. No PCB changes are needed, but system-level fault analysis should confirm that the enhanced protection aligns with safety requirements.