Analog Devices Inc./Maxim Integrated MAX6710NUT

Overview

MAX6710NUT from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit in a 6-pin SOT23 package that monitors four independent supply rails-including two adjustable thresholds (IN1, IN4) and fixed 3.0V (IN2) and 2.5V (IN3) inputs-with ±5% tolerance. It asserts a single active-low open-drain RESET output when any monitored voltage falls below its threshold and maintains reset for ≥140ms after recovery. It supports industrial systems requiring reliable power sequencing and brownout detection.

For engineers reviewing the MAX6710NUT datasheet, MAX6710NUT pinout, MAX6710NUT application, or MAX6710NUT equivalent, this device delivers low-quiescent-current supervision (35µA), 0.62V internal reference accuracy (±1.5%), immunity to short transients, guaranteed operation from -40°C to +85°C, and valid RESET assertion down to IN1 = 1V or IN2 = 1V-critical for multi-rail embedded control and telecom power management.

Technical Context

The MAX6710NUT uses an internal bandgap reference (0.62V) and four precision comparators with 0.3% hysteresis per channel to detect undervoltage conditions across its four inputs. Its architecture integrates factory-trimmed resistor-divider networks for fixed thresholds (IN2 = 3.0V, IN3 = 2.5V) and direct comparator input access for adjustable channels (IN1, IN4), enabling external resistor-divider configuration down to 0.62V.

Power is derived solely from IN2 (3.0V supply), eliminating need for separate VCC; RESET is open-drain with 10µA internal pullup to IN2 and remains valid as long as IN1 ≥ 1V or IN2 ≥ 1V. The device ignores transients <100µs at ≤50mV overdrive, ensuring robustness in noisy industrial environments.

Key Specifications

Pinout & Package

MAX6710NUT is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in telecom and embedded computing modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-33D and ADM1266ACPZ, the MAX6710NUT provides optimal balance of analog simplicity, dual adjustable monitoring, and ultra-low quiescent current in a space-saving SOT23-6-ideal for cost-sensitive, fixed-function industrial and telecom designs where I²C overhead is unnecessary.

Availability

MAX6710NUT is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, network-attached storage, and high-end printing equipment requiring stable component supply and long-term manufacturability.

Supply support for MAX6710NUT 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX6710 product line delivers compact, low-power supervisory solutions for multi-rail systems-designed specifically to replace discrete resistor-comparator circuits and reduce footprint in space-constrained embedded applications.

FAQ

What is the exact function of the IN2 pin on the MAX6710NUT?

The IN2 pin serves a dual role: it is both the primary power supply input for the MAX6710NUT and the monitored 3.0V ±5% supply rail. The device draws operating current from IN2, and RESET remains valid as long as IN2 ≥ 1V-even during brownout. This dual functionality eliminates the need for a separate VCC pin and simplifies power domain integration in 3.0V-centric systems.

Can the MAX6710NUT monitor a 1.2V supply, and how is it configured?

Yes, the MAX6710NUT can monitor a 1.2V supply using either IN1 or IN4, both of which feature a 0.62V ±1.5% internal reference. To supervise 1.2V, connect a resistor divider (e.g., R1 = 93kΩ, R2 = 100kΩ) such that V_TH = 0.62V × (R1 + R2)/R2 ≈ 1.2V. The MAX6710NUT's ±0.2µA input bias ensures <1% error with standard 1% resistors up to 100kΩ.

Does the MAX6710NUT require external pullup resistors on the RESET pin?

No, the MAX6710NUT includes a 10µA internal pullup to IN2, making external pullup resistors unnecessary in most 3.0V/2.5V systems. However, if interfacing with a higher logic voltage (e.g., 5V), an external pullup to that rail is recommended-the internal circuitry prevents reverse current flow into IN2, preserving supply integrity.

How does the MAX6710NUT handle short voltage transients on monitored inputs?

The MAX6710NUT rejects transients shorter than 100µs when the overdrive is ≤50mV below threshold-verified by glitch immunity characterization curves in the datasheet. This built-in filtering prevents false resets during switching noise, ESD events, or load-step disturbances without requiring external RC filters or firmware debouncing.

What is the minimum valid supply voltage for RESET assertion on the MAX6710NUT?

The MAX6710NUT guarantees correct RESET output state as long as either IN1 ≥ 1V or IN2 ≥ 1V. Below these levels, the internal comparators and timing circuitry may become undefined. This 1V operational floor enables reliable reset assertion even during deep brownout conditions common in industrial 24V-to-3.0V conversion stages.