Analog Devices Inc./Maxim Integrated MAX6710FUT

Overview

MAX6710FUT from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit in a 6-pin SOT23 package that monitors four independent supply rails-IN1 (adjustable), IN2 (3.3V), IN3 (2.5V), and IN4 (1.8V, −5% tolerance)-and asserts a single active-low open-drain RESET output when any falls below its threshold. It delivers 0.62V adjustable threshold accuracy (±1.5%), 140ms minimum reset timeout, 35µA supply current, and operates from −40°C to +85°C. Used in telecom and industrial embedded systems for power-rail integrity assurance.

For engineers reviewing the MAX6710FUT datasheet, MAX6710FUT pinout, MAX6710FUT application, or MAX6710FUT equivalent, this page provides verified functional identity, validated pin roles, confirmed threshold configurations per suffix, real-world timing behavior (tRP ≥140ms), and accurate alternative part comparisons-not generic supervisory IC summaries.

Technical Context

The MAX6710FUT uses an internal 0.62V bandgap reference with four precision comparators and factory-trimmed resistor-divider networks for fixed thresholds (IN2=3.3V, IN3=2.5V, IN4=1.8V at −5%), while IN1 accepts adjustable monitoring via external resistor dividers. Each comparator includes 0.3% VTH hysteresis to reject noise without degrading accuracy.

Power is derived solely from IN2 (3.3V), which also serves as the internal pullup source for the open-drain RESET output (10µA typical). RESET remains valid down to IN1 ≥1V or IN2 ≥1V, enabling brownout detection during partial supply collapse-critical for fail-safe system restart in networking equipment and data storage controllers.

Key Specifications

Pinout & Package

MAX6710FUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), footprint-compatible with industry-standard 2.9mm × 1.6mm × 1.1mm outline. Thermal pad not present; no exposed die attach pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-voltage supervisory applications.

Compared with MAX6710FUT, TPS3307-18-33-25 offers tighter fixed-threshold tolerances but lacks design flexibility for nonstandard rails, while ADM1185ARMZ-REEL saves power but increases component count and layout complexity to achieve quad monitoring.

Availability

MAX6710FUT is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLC controllers, and network-attached storage systems requiring stable component supply and long-term lifecycle support.

Supply support for MAX6710FUT 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, communications, and computing applications.

The MAX6710 series targets compact, multi-rail embedded systems needing reliable power-supply supervision with minimal external components-specifically optimized for telecom line cards, storage controllers, and industrial automation hardware.

FAQ

What voltage rails does the MAX6710FUT monitor, and how are they configured?

The MAX6710FUT monitors four rails: IN1 (adjustable, referenced to 0.62V internal threshold), IN2 (3.3V, −5%), IN3 (2.5V, −5%), and IN4 (1.8V, −5%). Configuration is factory-set per suffix-no external resistors needed for fixed rails. IN1 requires an external resistor divider to scale higher voltages down to the 0.62V comparator input. This exact configuration is confirmed in the Selector Guide for MAX6710FUT (top mark AAZF).

Does the MAX6710FUT require an external pullup resistor on the RESET pin?

No-MAX6710FUT includes a 10µA internal pullup to IN2, making external pullups unnecessary for 3.3V logic interfaces. An external pullup can be added to override the internal source when interfacing with different logic voltages (e.g., 5V or 1.8V), but reverse current flow is blocked by internal circuitry. This behavior is specified in the Electrical Characteristics table under RESET Output High Source Current (IOH = 10µA).

What is the minimum valid supply voltage for RESET assertion to remain functional?

RESET remains valid and correctly asserted as long as either IN1 ≥1.0V or IN2 ≥1.0V. This is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections. Below 1.0V on both pins, RESET behavior is undefined-so MAX6710FUT supports controlled shutdown sequencing in multi-rail systems where one rail collapses before others.

Can unused inputs on the MAX6710FUT be left floating?

No-unused inputs must not float. For unused adjustable inputs (e.g., IN1 if not used), connect a 1MΩ resistor to IN2 (or VCC). For unused fixed inputs, tie to a supply > their threshold (e.g., 3.3V for a 2.5V input). Grounding or floating causes unpredictable comparator behavior and potential false resets. This requirement is stated in the Applications Information section under "Unused Inputs".

How does the MAX6710FUT handle short-duration supply transients?

MAX6710FUT rejects transients <220µs in duration when the monitored voltage dips 50mV below threshold, as shown in the Typical Operating Characteristics graph "MAX6710 toc04". This immunity is achieved via internal filtering and comparator hysteresis (0.3% of VTH), preventing spurious resets during switching noise or ESD events-critical in industrial motor drive and telecom power systems.