Analog Devices Inc./Maxim Integrated MAX6710PUT+

Overview

The MAX6710PUT+ from Maxim Integrated is a precision quad-voltage microprocessor supervisory circuit in a 6-pin SOT23 package that monitors four independent supply rails-including adjustable thresholds down to 0.62V-and asserts a single active-low open-drain RESET output when any monitored voltage falls below its preset threshold. It operates from −40°C to +85°C, draws only 35µA, and provides 140ms minimum reset timeout for telecom, industrial, and computing systems requiring reliable power-up sequencing and brownout detection.

For engineers reviewing the MAX6710PUT+ datasheet, MAX6710PUT+ pinout, MAX6710PUT+ application, or MAX6710PUT+ equivalent, key selection criteria include its dual adjustable/monitored input configuration (IN1 and IN4), fixed 3.0V/1.8V monitoring on IN2/IN3, guaranteed RESET validity down to IN1 = 1V or IN2 = 1V, and immunity to short supply transients-critical for robust embedded system supervision.

Technical Context

The MAX6710PUT+ uses an internal 0.62V bandgap reference with four precision comparators and factory-trimmed resistor-divider networks for fixed thresholds, while adjustable inputs (IN1, IN4) accept external resistor dividers to scale higher voltages to the 0.62V comparator input. Its architecture includes built-in 0.3% threshold hysteresis and glitch rejection logic that ignores transients under 100µs at typical overdrive levels.

Power is derived solely from IN2 (3.0V), which also serves as the internal pullup source for the open-drain RESET output (10µA typ). The device guarantees functional RESET assertion and deassertion across the full temperature range, with threshold accuracy maintained via 60ppm/°C temperature coefficient and ±1.5% total error over temperature.

Key Specifications

Pinout & Package

The MAX6710PUT+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), with gull-wing leads and standard JEDEC MO-178AC footprint. Pin 1 is marked with a dot; pin numbering follows top-view counterclockwise convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6710PUT+, both alternatives reduce channel count and configurability: MAX6314US29D3+ omits one monitored rail and all adjustability, while TPS3307-18DGNR provides only dual fixed monitoring and adds manual reset at the cost of losing two adjustable inputs - neither supports the same 3.0V/1.8V/fixed + dual-adjustable architecture.

Availability

MAX6710PUT+ is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC I/O modules, network attached storage (NAS), medical diagnostic imaging subsystems, and high-end printers requiring stable component supply and long-term industrial-grade availability.

Supply support for MAX6710PUT+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, communications, and computing applications.

The MAX6710 product line delivers compact, low-power quad-voltage supervision for multi-rail systems where space, reliability, and supply flexibility are critical - targeting applications needing simultaneous monitoring of fixed and user-defined rails without external trimming components.

FAQ

What is the exact function of the IN2 pin on the MAX6710PUT+?

The IN2 pin on the MAX6710PUT+ serves a dual role: it is both the monitored 3.0V (−5%) supply rail and the primary power source for the device. The internal 10µA pullup for the open-drain RESET output is sourced from IN2, and RESET remains valid as long as IN2 stays above 1.0V - making IN2 essential for both supervision and functional operation of the MAX6710PUT+.

Can the MAX6710PUT+ monitor a 5.0V rail, and if so, how?

Yes, the MAX6710PUT+ can monitor a 5.0V rail using either IN1 or IN4, both of which are adjustable inputs with a 0.62V internal threshold. By connecting a resistor divider (e.g., R1 = 6.8kΩ, R2 = 1.0kΩ) between the 5.0V rail and ground, the voltage at IN1 or IN4 is scaled to 0.62V at nominal 5.0V, enabling accurate undervoltage detection - confirmed by the Selector Guide and Figure 4 in the MAX6710PUT+ datasheet.

What is the minimum supply voltage required for the MAX6710PUT+ to assert a valid RESET signal?

The MAX6710PUT+ guarantees valid RESET assertion and deassertion as long as either IN1 or IN2 remains above 1.0V. This specification is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables, enabling reliable brownout response even during deep supply sag - a key differentiator from supervisors requiring higher minimum operating voltage.

Does the MAX6710PUT+ require external pullup resistors for the RESET output?

No, the MAX6710PUT+ includes a weak internal 10µA pullup to IN2, eliminating the need for an external pullup in most 3.0V–3.3V logic interfacing scenarios. However, if interfacing with a different logic supply (e.g., 5V), an external pullup resistor can safely overdrive the internal pullup without reverse current flow - as verified in the Applications Information section of the MAX6710PUT+ datasheet.

How does the MAX6710PUT+ handle short-duration supply transients?

The MAX6710PUT+ incorporates built-in transient immunity that rejects input glitches under 100µs in duration, as shown in the Typical Operating Characteristics graph "Maximum IN_ Transient Duration vs. Reset Threshold Overdrive." This feature prevents false resets caused by switching noise or brief load dumps, removing the need for external RC filters on monitored rails in typical industrial and telecom applications.