Analog Devices Inc./Maxim Integrated MAX6710NUT-T

Overview

MAX6710NUT-T from Maxim Integrated is a precision quad-voltage microprocessor supervisory IC in SOT23-6 package, monitoring four supply rails-including adjustable thresholds on IN1, IN3, and IN4, and fixed 3.0V (−5%) on IN2-with active-low open-drain RESET output. It asserts reset if any monitored voltage falls below its threshold and holds reset for ≥140ms after recovery, supporting reliable power-up sequencing in multi-rail embedded systems.

For engineers reviewing the MAX6710NUT-T datasheet, MAX6710NUT-T pinout, MAX6710NUT-T application, or MAX6710NUT-T equivalent, key selection considerations include its −5% tolerance on the 3.0V monitored rail, 0.62V internal reference for adjustable inputs, 140ms min reset timeout, 35μA quiescent current, and guaranteed operation from −40°C to +85°C in compact SOT23-6.

Technical Context

The MAX6710NUT-T integrates four independent voltage comparators with a shared 0.62V bandgap reference and factory-trimmed resistor dividers for fixed thresholds. Its IN2 serves as both power supply and monitored 3.0V input with −5% tolerance, while IN1/IN3/IN4 accept externally scaled voltages via resistor dividers.

Reset assertion is synchronized across all inputs using a NOR gate and a 140ms timeout timer; the open-drain RESET output features a 10μA internal pullup to IN2 and remains valid as long as IN1 or IN2 ≥1.0V, enabling robust operation during brown-out conditions.

Key Specifications

Pinout & Package

Package: SOT23-6, 6-pin surface-mount, lead-free (RoHS-compliant) with top mark "AAZN" per Selector Guide.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6710NUT-T, MAX6710MUT-T offers earlier 3.0V reset assertion but reduced noise margin, while TPS3808G33DBVR sacrifices input count and adjustability for vendor ecosystem alignment-neither is pin-compatible, requiring layout changes.

Availability

MAX6710NUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, network switch power management, medical imaging subsystems, and automotive infotainment head units requiring stable component supply across extended temperature ranges.

Supply support for MAX6710NUT-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 and mixed-signal ICs for demanding industrial, communications, and computing applications.

The MAX6700/MAX6710 family delivers compact, low-power quad/triple voltage supervision for multi-rail embedded systems-optimized for space-constrained designs needing accurate, coordinated reset signaling.

FAQ

What is the exact reset threshold voltage for the IN2 pin on MAX6710NUT-T?

The IN2 pin on MAX6710NUT-T is factory-trimmed to monitor a 3.0V supply with −5% tolerance, resulting in a guaranteed reset threshold of 2.85V (min), 2.93V (typ), and 3.00V (max) as specified in the Electrical Characteristics table. This fixed threshold applies exclusively to IN2 and is not adjustable.

Does MAX6710NUT-T require an external pullup resistor on the RESET pin?

No-MAX6710NUT-T includes a 10μA internal pullup to IN2 on the open-drain RESET pin, eliminating the need for an external pullup in most 3.0V/3.3V logic interfaces. An external pullup may be added only if interfacing with a different logic voltage (e.g., 1.8V or 5.0V), and internal circuitry prevents reverse current flow from that external source to IN2.

Can unused inputs like IN1, IN3, or IN4 be left floating on MAX6710NUT-T?

No-unused adjustable inputs on MAX6710NUT-T must not be left floating or grounded. Per the Applications Information section, each unused input should be connected via a 1MΩ series resistor to IN2 (or VCC) to limit bias current and prevent erroneous reset assertion caused by leakage or noise coupling.

What is the minimum valid voltage on IN2 for MAX6710NUT-T to maintain RESET functionality?

MAX6710NUT-T guarantees correct RESET output state as long as IN2 remains ≥1.0V, per Absolute Maximum Ratings Note 3. Below 1.0V, RESET behavior is undefined-even if other inputs remain valid-so system design must ensure IN2 sustains ≥1.0V during brown-out events where RESET signaling is still required.

How does the 140ms reset timeout period of MAX6710NUT-T improve system reliability?

The 140ms (minimum) reset timeout period of MAX6710NUT-T ensures the microprocessor or FPGA remains held in reset long enough for all four monitored supplies to fully stabilize, clock circuits to settle, and internal PLLs to lock-preventing race conditions, metastability, or corrupted configuration that could occur with shorter timeouts, especially in systems with slow-ramping LDOs or large bulk capacitance.