Analog Devices Inc./Maxim Integrated MAX6710OUT+

Overview

MAX6710OUT+ from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit that monitors four independent supply rails-including one 3.0V fixed threshold, one 1.8V fixed threshold, and two adjustable inputs (0.62V internal reference)-and asserts a single active-low open-drain RESET output when any falls below its threshold. It operates from -40°C to +85°C in a 6-pin SOT23 package with 35µA quiescent current and 140ms minimum reset timeout, targeting power integrity in embedded telecom and industrial control systems.

For engineers reviewing the MAX6710OUT+ datasheet, MAX6710OUT+ pinout, MAX6710OUT+ application, or MAX6710OUT+ equivalent, key selection criteria include its dual adjustable input capability, guaranteed RESET validity down to IN1 = 1V or IN2 = 1V, factory-trimmed 1.8V/3.0V thresholds with ±5% tolerance options, and immunity to short-duration supply transients-critical for reliable boot sequencing in multi-rail systems.

Technical Context

The MAX6710OUT+ uses an internal 0.62V bandgap reference and four precision comparators with 0.3% threshold hysteresis to detect undervoltage conditions across its four inputs. Its architecture separates monitoring function from power sourcing: IN2 serves as both monitored voltage and primary device supply, while unused adjustable inputs require 1MΩ pull-up to IN2 to limit bias current.

Reset assertion is governed by NOR logic across all comparator outputs, followed by a 140ms–280ms timeout timer; the open-drain RESET output features a 10µA internal pullup to IN2 and supports external pullup to voltages up to 5.5V without reverse current flow, enabling flexible interface with diverse logic families.

Key Specifications

Pinout & Package

MAX6710OUT+ is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height-optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6711OUT+, MAX6710OUT+ offers greater undervoltage margin on fixed rails but less precision; versus TPS3307-33D, it delivers true quad monitoring with adjustable flexibility at the cost of higher complexity-making it optimal for heterogeneous multi-rail systems demanding compact, accurate supervision.

Availability

MAX6710OUT+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and network-attached storage equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6710OUT+ 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 MAX6710 series belongs to Maxim's µP supervisory product line, engineered specifically for compact, low-power, multi-rail voltage monitoring in space- and reliability-critical embedded systems.

FAQ

What voltage rails does the MAX6710OUT+ monitor by default?

The MAX6710OUT+ monitors four rails: IN2 is a fixed 3.0V supply (−10% tolerance), IN3 is a fixed 1.8V supply (−10%), and IN1 and IN4 are adjustable inputs each referenced to an internal 0.62V threshold. This configuration enables precise supervision of two custom rails alongside standard 3.0V and 1.8V domains without external resistors on the fixed inputs.

Can the MAX6710OUT+ operate if only IN1 is above 1V while IN2 is below specification?

No-the MAX6710OUT+ requires either IN1 ≥ 1V or IN2 ≥ 1V for RESET output validity, but full functionality (including accurate threshold comparison and timeout timing) depends on IN2 being within its operational range (1.2V to 5.5V). If IN2 drops below 1.2V, the device may lose internal biasing, causing unpredictable behavior despite RESET remaining asserted.

How do I configure the adjustable inputs (IN1 and IN4) to monitor a 2.5V rail?

To monitor 2.5V on IN1 or IN4, use a resistor divider where V_TH = 0.62V × (R1 + R2)/R2. Solving for R1 with R2 = 100kΩ yields R1 ≈ 303kΩ. The MAX6710OUT+'s ±0.2µA input current ensures <1% error with R2 ≤ 100kΩ, so select standard 1% resistors (e.g., 100kΩ and 301kΩ) and verify against actual rail tolerances in your layout.

Is the RESET output of the MAX6710OUT+ compatible with 5V logic systems?

Yes-the MAX6710OUT+ RESET output is open-drain and can be externally pulled up to any voltage from 0V to 5.5V. To interface with 5V logic, connect a pullup resistor (e.g., 10kΩ) from RESET to the 5V supply. The internal 10µA pullup to IN2 is overridden, and internal circuitry prevents reverse current flow into IN2, ensuring safe level translation.

What is the maximum transient duration the MAX6710OUT+ ignores on monitored inputs?

The MAX6710OUT+ ignores transients ≤100µs in duration when the monitored voltage undershoots its threshold by ≥50mV, as confirmed by the glitch immunity graph (MAX6710 toc04). This immunity prevents false resets during brief noise spikes or switching regulator ripple, making it suitable for electrically noisy industrial and telecom environments where supply stability cannot be guaranteed.