Analog Devices Inc./Maxim Integrated MAX6710FUT-T

Overview

MAX6710FUT-T from Maxim Integrated is a precision quad-voltage microprocessor supervisory IC that monitors four 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 features 140ms minimum reset timeout, 0.62V internal reference for adjustable thresholds, 35μA supply current, and operates across −40°C to +105°C in a 6-pin SOT23 package. Used in servers and industrial equipment for reliable power-on reset sequencing.

For engineers reviewing the MAX6710FUT-T datasheet, MAX6710FUT-T pinout, MAX6710FUT-T application, or MAX6710FUT-T equivalent, key selection considerations include its extended temperature rating (+105°C), factory-trimmed 3.3V/2.5V/1.8V thresholds with −5% tolerance, adjustable IN1 input, 140ms reset timeout, and open-drain RESET with 10μA internal pullup to IN2.

Technical Context

The MAX6710FUT-T implements four independent voltage comparators referenced to a precision 0.62V bandgap, with internal resistor-divider networks setting fixed thresholds for IN2 (3.3V), IN3 (2.5V), and IN4 (1.8V, −5%). Its NOR-gated output drives an internal timeout circuit that holds RESET low for ≥140ms after all inputs exceed thresholds.

It draws power from IN2 (not VCC), remains functional with IN1 or IN2 ≥1.0V, and includes 0.3% threshold hysteresis and immunity to transients ≤100µs at 50mV overdrive. The device uses BiCMOS process and supports manual reset via external switch on adjustable inputs.

Key Specifications

Pinout & Package

Package: 6-pin SOT23-6, surface-mount, RoHS-compliant (lead-free with "+T" suffix); footprint compatible with standard U6+1 land pattern (outline 21-0058).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6710EUT-T, the MAX6710FUT-T adds +105°C operation and −5% (tighter) 1.8V threshold; versus TPS3808G33DBVR, it delivers true quad monitoring, integrated adjustability, and reduced external component count - making it optimal for thermally demanding, multi-rail embedded systems.

Availability

MAX6710FUT-T is available at Aetrix Electronics and suitable for servers/workstations, industrial PLCs, high-end network switches, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6710FUT-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 power, sensing, and interface applications, with emphasis on high-reliability, low-power solutions.

The MAX6700/MAX6710 product line delivers compact, multi-rail supervisory circuits optimized for space-constrained, thermally aggressive embedded systems requiring guaranteed reset timing and rail-specific voltage monitoring.

FAQ

What is the operating temperature range of the MAX6710FUT-T?

The MAX6710FUT-T is specified for continuous operation from −40°C to +105°C. This extended range is validated per the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, making it suitable for industrial control cabinets, telecom base stations, and server chassis where ambient temperatures exceed +85°C. The "F" suffix explicitly denotes this +105°C rating, distinguishing it from the +85°C variants like MAX6710EUT-T.

How does the MAX6710FUT-T handle multiple supply faults?

The MAX6710FUT-T asserts its active-low RESET output whenever any of its four monitored inputs-IN1 (adjustable), IN2 (3.3V), IN3 (2.5V), or IN4 (1.8V, −5%)-drops below its respective threshold. RESET remains asserted for a guaranteed minimum of 140ms after all inputs recover above their thresholds, ensuring robust system reset even during cascading power faults. Its internal NOR logic guarantees immediate response to the first fault detected.

Can the MAX6710FUT-T monitor a 1.2V supply rail?

Yes, the MAX6710FUT-T can monitor a 1.2V rail using its adjustable IN1 input. With an internal 0.62V comparator threshold and ±1.5% accuracy, a simple external resistor divider (e.g., R1 = 93.5kΩ, R2 = 100kΩ) scales 1.2V down to 0.62V at the input. The datasheet confirms input bias current ≤0.4μA on IN1, allowing high-value resistors with minimal error - enabling accurate supervision of sub-1.8V rails without additional ICs.

Is an external pullup resistor required for the RESET output of the MAX6710FUT-T?

No external pullup resistor is required for the MAX6710FUT-T's RESET output in most 3.3V logic interfaces, because it includes a 10μA internal pullup to IN2. This weak pullup ensures valid logic-high levels when interfacing with 3.3V CMOS inputs. However, if driving a different logic family (e.g., 5V TTL), an external pullup to the target supply is recommended - the internal pullup will not conflict, as reverse current flow is blocked by internal circuitry.

What is the reset timeout period for the MAX6710FUT-T, and is it adjustable?

The MAX6710FUT-T has a fixed minimum reset timeout period of 140ms, with typical and maximum values of 200ms and 280ms respectively. This timeout is internally generated and not user-adjustable - it is implemented via an on-chip timer that holds RESET low for the full duration after all monitored supplies recover. Unlike some supervisors with external RC timing, the MAX6710FUT-T's 140ms guarantee simplifies design and improves repeatability across temperature and voltage.