Analog Devices Inc./Maxim Integrated MAX6710CUT+T

Overview

MAX6710CUT+T from Analog Devices is a precision quad-voltage microprocessor supervisory IC that monitors 5.0V (−10%), 3.3V (−10%), 1.8V (−10%), and one adjustable supply down to 0.62V, asserting a single active-low open-drain RESET when any falls below threshold. It operates from −40°C to +105°C in a 6-pin SOT23 package and delivers 140ms minimum reset timeout for reliable power-on sequencing in embedded computing systems.

For engineers reviewing the MAX6710CUT+T datasheet, MAX6710CUT+T pinout, MAX6710CUT+T application, or MAX6710CUT+T equivalent, key selection criteria include factory-trimmed −10% thresholds for 5V/3.3V/1.8V rails, 0.62V adjustable input reference with 1.5% accuracy, 35μA supply current, 140ms reset timeout, and guaranteed operation with IN1 or IN2 ≥1V - critical for industrial and telecom power-rail monitoring.

Technical Context

The MAX6710CUT+T integrates four independent voltage comparators with a shared 0.62V internal bandgap reference and factory-laser-trimmed resistor dividers for fixed thresholds. Its architecture uses NOR logic to combine comparator outputs and drive an open-drain RESET with weak 10μA internal pullup to IN2.

It features 0.3% reset threshold hysteresis and immunity to transients ≤100μs at 50mV overdrive, enabling robust operation in noisy power environments. The device remains functional as long as either IN1 or IN2 exceeds 1.0V, decoupling reset validity from full system power-up.

Key Specifications

Pinout & Package

MAX6710CUT+T is housed in a RoHS-compliant 6-pin SOT23-6 package (outline 21-0058), footprint-compatible with standard SOT23 land pattern 90-0175. Thermal derating is 8.7mW/°C above +70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6710CUT+T, MAX6710AUT+T offers identical quad supervision but swaps 1.8V for 2.5V monitoring - suitable for mixed-logic systems - while TLV809E33DBVR provides minimal 3.3V-only supervision at lower cost but cannot replace quad-rail coordination or adjustable threshold capability.

Availability

MAX6710CUT+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLCs, and notebook platform designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6710CUT+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX6710CUT+T belongs to the MAX6700/MAX6710 family of precision quad/triple voltage supervisors, designed specifically for space-constrained, multi-rail embedded systems demanding high accuracy, low power, and guaranteed operation across −40°C to +105°C.

FAQ

What is the exact reset threshold voltage for each monitored input on the MAX6710CUT+T?

The MAX6710CUT+T has factory-trimmed thresholds: IN1 = 4.50V (5.0V −10%), IN2 = 2.97V (3.3V −10%), IN3 = 1.62V (1.8V −10%), and IN4 = 0.62V (adjustable reference). These values are guaranteed over −40°C to +105°C with ±0.13V max deviation for fixed thresholds and ±1.5% accuracy for the adjustable input. The MAX6710CUT+T datasheet Table 1 lists absolute min/max limits under electrical characteristics.

Does the MAX6710CUT+T require an external pullup resistor on the RESET pin?

No, the MAX6710CUT+T includes a 10μA internal pullup to IN2, making an external pullup unnecessary when interfacing with 3.3V logic. However, if driving a different logic voltage (e.g., 5V or 1.8V), an external pullup to that rail is required - the MAX6710CUT+T's internal circuitry prevents reverse current flow from the external pullup into IN2.

How does the MAX6710CUT+T handle short voltage transients on monitored inputs?

The MAX6710CUT+T is immune to transients ≤100μs duration when the overdrive is ≤50mV above threshold, as verified in the Typical Operating Characteristics graph "Maximum IN_ Transient Duration vs. Reset Threshold Overdrive." This built-in glitch rejection prevents false resets during switching noise or load-dump events without requiring external RC filtering.

Can unused inputs on the MAX6710CUT+T be left floating?

No - unused inputs must not float. For fixed-threshold inputs (IN1–IN3), connect to a supply ≥ their threshold voltage (e.g., tie unused IN1 to 5V). For the adjustable IN4, connect via a 1MΩ resistor to IN2. Floating inputs cause unpredictable comparator behavior and may trigger spurious RESET assertions in the MAX6710CUT+T.

What is the minimum operating voltage required for the MAX6710CUT+T to assert a valid RESET signal?

The MAX6710CUT+T guarantees RESET validity when either IN1 or IN2 is ≥1.0V - no requirement for full VCC or all rails to be present. This allows early reset assertion during power ramp-up. If both IN1 and IN2 drop below 1.0V, RESET becomes undefined; the device itself remains powered as long as IN2 ≥1.0V (or VCC ≥2.0V for Q variants, not applicable to MAX6710CUT+T).