Analog Devices Inc./Maxim Integrated MAX6710LUT

Overview

MAX6710LUT from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit in a 6-pin SOT23 package that monitors four independent supply rails-including adjustable thresholds at IN1 and IN4, fixed 3.3V at IN2, and fixed 1.8V at IN3-with ±5% tolerance, 140ms minimum reset timeout, and 35µA quiescent current. It asserts a single active-low open-drain RESET output when any monitored voltage falls below its threshold, supporting telecom, networking, and industrial embedded systems requiring reliable power sequencing and brownout detection.

For engineers reviewing the MAX6710LUT datasheet, MAX6710LUT pinout, MAX6710LUT application, or MAX6710LUT equivalent, key selection criteria include its dual adjustable inputs (IN1/IN4), factory-trimmed 3.3V/1.8V fixed thresholds, guaranteed operation down to IN1 = 1V or IN2 = 1V, immunity to short transients (<100µs), and compatibility with low-voltage system architectures requiring high-accuracy undervoltage monitoring without external resistors for standard rails.

Technical Context

The MAX6710LUT implements four independent comparators referenced to a precision bandgap (0.62V typical) with 0.3% hysteresis per channel, enabling stable threshold detection across temperature (-40°C to +85°C). Its internal resistor-divider networks set fixed thresholds for IN2 (3.3V) and IN3 (1.8V), while IN1 and IN4 accept externally scaled voltages via resistor dividers anchored to the 0.62V reference.

Power is derived solely from IN2 (3.3V), eliminating need for separate VCC; RESET remains valid as long as IN1 ≥ 1V or IN2 ≥ 1V. The open-drain output includes a 10µA internal pullup to IN2 and supports external pullup to any logic rail up to 5.5V, with no reverse current flow.

Key Specifications

Pinout & Package

The MAX6710LUT is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in networking and embedded control applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6711LUT and TPS3307-33D, the MAX6710LUT uniquely combines ±5% fixed thresholds for 3.3V/1.8V rails with two fully adjustable inputs-enabling precise supervision of heterogeneous supply architectures without sacrificing SOT23 size or 35µA quiescent current.

Availability

MAX6710LUT is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and network switch designs requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C operation.

Supply support for MAX6710LUT 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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.

The MAX6710 product line delivers compact, low-power supervisory circuits for multi-rail systems-specifically engineered to replace discrete solutions in space- and reliability-critical embedded applications.

FAQ

What is the exact threshold voltage for IN2 and IN3 on the MAX6710LUT?

The MAX6710LUT has factory-trimmed fixed thresholds: IN2 monitors 3.3V with ±5% tolerance (4.25V to 4.50V for 5V variants not applicable; actual IN2 threshold is 3.3V × 0.95 = 3.135V min, 3.3V × 1.05 = 3.465V max), and IN3 monitors 1.8V with ±5% tolerance (1.71V min, 1.89V max). These values are specified in the Electrical Characteristics table and validated across temperature.

Can the MAX6710LUT operate if IN2 drops below 3.3V but remains above 1V?

Yes-the MAX6710LUT guarantees RESET output validity as long as IN2 ≥ 1V (or IN1 ≥ 1V). Its internal circuitry continues functioning and asserting RESET correctly down to this level, enabling brownout detection in degraded supply conditions where other supervisors may fail.

How do I configure IN1 and IN4 to monitor a 5.0V supply using the MAX6710LUT?

To monitor 5.0V on IN1 or IN4, use a resistor divider where V_TH = 0.62V × (R1 + R2)/R2. Solving for R1 with R2 = 100kΩ gives R1 ≈ 709.7kΩ. The MAX6710LUT's ±0.2µA input current ensures <1% error with R2 ≤ 100kΩ, making this configuration accurate and stable.

Does the MAX6710LUT require an external pullup resistor on the RESET pin?

No-MAX6710LUT includes a 10µA internal pullup to IN2, sufficient for interfacing with most 3.3V logic. An external pullup is only needed when driving logic with different supply voltages (e.g., 5V or 1.8V), and must be sized to overdrive the internal current without exceeding 20mA absolute maximum sink rating.

What is the minimum reset timeout period for the MAX6710LUT, and is it guaranteed over temperature?

The MAX6710LUT guarantees a minimum reset timeout period of 140ms across the full operating temperature range (-40°C to +85°C), with typical value 200ms and maximum 280ms. This is confirmed in the Electrical Characteristics table under "Reset Timeout Period (t_RP)" and validated by production testing.