Analog Devices Inc./Maxim Integrated MAX6710KUT-T

Overview

MAX6710KUT-T from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring up to four supply rails-including fixed 3.3V and 1.8V thresholds with -10% tolerance-and asserting a single active-low RESET output when any falls below its threshold. It features 140ms minimum reset timeout, 0.62V adjustable threshold capability, 35μA supply current, and operates across -40°C to +105°C for industrial-grade system integrity.

For engineers reviewing the MAX6710KUT-T datasheet, MAX6710KUT-T pinout, MAX6710KUT-T application, or MAX6710KUT-T equivalent, this device serves as a compact, high-accuracy voltage monitor for multi-rail embedded systems requiring guaranteed reset timing, glitch immunity, and extended temperature operation without external components.

Technical Context

The MAX6710KUT-T implements four independent voltage comparators with internal bandgap reference (0.62V), factory-trimmed resistor-divider networks for fixed thresholds (3.3V, 1.8V), and adjustable inputs supporting down to 0.62V via external dividers. Each comparator includes 0.3% VTH hysteresis for noise immunity.

It uses IN2 as both power supply and monitored input (3.3V), supports RESET assertion valid down to IN1/IN2 = 1V, and delivers a 140ms (min) reset timeout after all voltages recover-distinct from the 5μs propagation delay of the MAX6700 series. The open-drain RESET output includes a 10μA internal pullup to IN2.

Key Specifications

Pinout & Package

Package: 6-pin SOT23-6, surface-mount, RoHS-compliant, tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6710KUT-T, MAX6710AUT-T sacrifices extended temperature range and 1.8V support for lower cost in benign environments, while TPS3808G33DBVR lacks quad capability and pin compatibility-making MAX6710KUT-T the sole option for compact, high-accuracy, -40°C to +105°C quad supervision with 1.8V integration.

Availability

MAX6710KUT-T is available at Aetrix Electronics and suitable for industrial control systems, network infrastructure equipment, and medical electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6710KUT-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 product line delivers compact, low-power voltage supervision for multi-rail embedded systems-specifically engineered to replace discrete resistor/comparator solutions with guaranteed accuracy, temperature stability, and reset timing control.

FAQ

What is the exact reset timeout duration specified for MAX6710KUT-T?

The MAX6710KUT-T guarantees a minimum reset timeout period of 140ms after all monitored voltages rise above their thresholds. Typical timeout is 200ms, with a maximum of 280ms across the full -40°C to +105°C operating range. This timing is internally generated and does not require external capacitors or resistors-ensuring consistent behavior regardless of PCB layout or environmental conditions. The MAX6710KUT-T specification strictly defines this as a hard minimum, making it suitable for systems requiring deterministic reset hold times.

Does MAX6710KUT-T support monitoring a 1.2V supply rail?

Yes, the MAX6710KUT-T supports monitoring a 1.2V rail using either IN1 or IN4 as adjustable inputs. With an internal 0.62V comparator threshold, a simple resistor divider (e.g., R1 = 93.5kΩ, R2 = 100kΩ) scales the 1.2V input to meet the 0.62V reference. Input bias current is limited to ±0.2μA, enabling high-impedance dividers with <1% error. The MAX6710KUT-T datasheet confirms this configuration is validated for rails down to 0.62V, and the device maintains 1.5% threshold accuracy over temperature for such setups.

How does MAX6710KUT-T handle power loss on the IN2 supply?

When IN2 drops below 1V, the MAX6710KUT-T's RESET output becomes invalid-meaning its state is no longer guaranteed. However, as long as IN2 remains ≥1V, RESET remains asserted low if any monitored input falls below its threshold, and holds low for the full 140ms timeout after recovery. The MAX6710KUT-T does not derive power from VCC; IN2 is both supply and monitored rail. This architecture ensures RESET remains functional during partial brownouts where IN2 sustains >1V while other rails collapse-critical for graceful shutdown sequencing in multi-supply systems.

Is MAX6710KUT-T pin-compatible with other MAX6710 variants?

Yes, all MAX6710 variants-including MAX6710KUT-T-share identical 6-pin SOT23-6 pinout and footprint per Maxim's official package drawing (Outline No. 21-0058). Pin 1 is IN1, Pin 2 is IN2, Pin 3 is IN3, Pin 4 is IN4, Pin 5 is GND, and Pin 6 is RESET. This allows direct substitution between temperature- or threshold-variant parts (e.g., MAX6710AUT-T, MAX6710FUT-T) without PCB changes-provided the application's voltage monitoring requirements align with the specific variant's factory-trimmed thresholds and temperature rating.

What is the maximum input voltage allowed on IN1 or IN4 when used as adjustable monitors?

The MAX6710KUT-T specifies an internal voltage clamp of 1.5V (typical) on adjustable inputs IN1 and IN4. Applying more than 1.5V directly risks exceeding the ±0.4μA (IN1) or ±0.2μA (IN4) guaranteed input current limits, introducing measurement error or potential damage. To safely monitor rails >1.5V (e.g., 5V), a resistor divider must scale the input to ≤1.5V at the pin. The MAX6710KUT-T datasheet explicitly prohibits direct connection of >1.5V to these pins and validates operation only with properly designed external dividers meeting the 0.62V reference condition.