Analog Devices Inc./Maxim Integrated MAX6710KUT

Overview

MAX6710KUT 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 at IN1 and IN4, fixed 3.3V at IN2, and fixed 1.8V at IN3-and asserts a single active-low open-drain RESET output when any falls below its threshold. It delivers 0.62V internal reference accuracy (±1.5%), 140ms min reset timeout, 35µA supply current, and operates from −40°C to +85°C for telecom and industrial embedded systems.

For engineers reviewing the MAX6710KUT datasheet, MAX6710KUT pinout, MAX6710KUT application, or MAX6710KUT equivalent, key selection considerations include its factory-configured 3.3V/1.8V fixed thresholds with two adjustable inputs, guaranteed RESET validity down to IN1 = 1V or IN2 = 1V, immunity to short supply transients, and compatibility with low-voltage system power sequencing and brownout detection.

Technical Context

The MAX6710KUT uses an internal bandgap reference (0.62V) and four precision comparators with 0.3% VTH hysteresis to detect undervoltage conditions across four inputs. Its architecture powers the device from IN2 (3.3V), eliminating need for separate VCC-unlike the MAX6710Q variant-while maintaining RESET assertion validity as long as IN1 ≥ 1V or IN2 ≥ 1V.

Thresholds are set via internal resistor-divider networks for fixed rails (IN2 = 3.3V ±10%, IN3 = 1.8V ±10%) and direct comparator input connection for adjustable rails (IN1, IN4), requiring external resistor dividers to scale monitored voltages to 0.62V. The open-drain RESET output includes a 10µA internal pullup to IN2 and supports external pullup to any voltage ≤5.5V.

Key Specifications

Pinout & Package

The MAX6710KUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and standard thermal pad layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-33D and ADM1085AKSZ-REEL7, the MAX6710KUT uniquely combines two adjustable inputs with fixed 3.3V/1.8V rails in one SOT23-6 package, enabling true quad-rail supervision without external references or additional ICs-critical for space-constrained, multi-voltage systems.

Availability

MAX6710KUT is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC controllers, network attached storage (NAS), and high-end multifunction printers requiring stable component supply and long-term production continuity.

Supply support for MAX6710KUT 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 industrial, communications, computing, and consumer applications.

The MAX6710 product line delivers compact, low-power quad-voltage supervisors for systems with heterogeneous supply rails-targeting applications where board space, reliability, and multi-rail coordination are critical design constraints.

FAQ

What is the exact function of the IN2 pin on the MAX6710KUT?

The IN2 pin on the MAX6710KUT serves a dual role: it is both the monitored 3.3V ±10% supply input and the primary power source for the device itself. Unlike the MAX6710Q variant, the MAX6710KUT does not have a separate VCC pin. The internal RESET output is pulled up to IN2 with a 10µA current source, and RESET remains valid as long as IN2 ≥ 1V-even during brownout-ensuring robust reset signaling in degraded supply conditions.

Can the MAX6710KUT monitor a 5.0V supply?

No, the MAX6710KUT cannot directly monitor a 5.0V supply. Its fixed thresholds are factory-set to 3.3V (IN2) and 1.8V (IN3); IN1 and IN4 are adjustable but reference an internal 0.62V threshold. To monitor 5.0V, an external resistor divider must be used on either IN1 or IN4 to scale 5.0V down to 0.62V (e.g., R1 = 6.05kΩ, R2 = 1kΩ). The MAX6710KUT's Selector Guide confirms its configuration is Adj*/3.3V/1.8V/Adj*, with no 5.0V option.

What is the maximum input voltage allowed on the adjustable pins (IN1 and IN4) of the MAX6710KUT?

The absolute maximum rating for all input pins-including IN1 and IN4-is +6V with respect to GND. However, the MAX6710KUT does not include internal clamping diodes on adjustable inputs (unlike the MAX6710Q), so sustained voltages above 6V risk permanent damage. For reliable operation, keep IN1 and IN4 within 0.62V to 5.5V, and ensure external resistor dividers limit voltage and current per the datasheet's ±0.4µA input bias specification.

How does the MAX6710KUT handle short voltage transients on monitored supplies?

The MAX6710KUT incorporates built-in glitch immunity: it ignores transients shorter than ~100µs when the voltage dip exceeds 50mV below threshold, as confirmed by the "Maximum IN_ Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet. This prevents false resets from switching noise, ESD coupling, or load-step artifacts-making it suitable for electrically noisy industrial and telecom environments without requiring additional RC filtering on each input.

Is the MAX6710KUT pin-compatible with other variants in the MAX6710 family?

Yes, all MAX6710 variants-including MAX6710KUT-are pin-compatible in the 6-pin SOT23-6 package with identical pinout (IN1, IN2, IN3, IN4, GND, RESET). However, internal configurations differ: MAX6710KUT monitors Adj*/3.3V/1.8V/Adj* with ±10% tolerance, while MAX6710JUT uses ±5% tolerance, and MAX6710QUT substitutes VCC for IN2 and adds no fixed thresholds. Electrical behavior (e.g., RESET pullup target, input bias) remains consistent across non-Q variants.