Analog Devices Inc./Maxim Integrated MAX6827VUT+T

Overview

MAX6827VUT+T from Maxim Integrated is an ultra-low-voltage dual-supply microprocessor supervisory IC in 6-pin SOT23 package, featuring active-high push-pull RESET output, manual reset input (MR), watchdog timer (1.6s timeout), and user-adjustable RESET IN threshold (0.63V typ). It monitors primary VCC (1.53V–2.0V range, 1.58V threshold) and secondary supply via RESET IN, with guaranteed reset validity down to VCC = +1.2V across –40°C to +125°C. Used in battery-powered embedded controllers requiring reliable brownout detection and watchdog supervision.

For engineers reviewing the MAX6827VUT+T datasheet, MAX6827VUT+T pinout, MAX6827VUT+T application, or MAX6827VUT+T equivalent, this page delivers verified electrical parameters, thermal operating limits, reset timing behavior, watchdog interface requirements, and real-world design implications for portable, multivoltage, and critical µP monitoring systems.

Technical Context

The MAX6827VUT+T implements a dual-threshold supervision architecture: one factory-trimmed VCC monitor (1.58V nominal at –40°C to +125°C) and one high-impedance RESET IN input with internal 0.63V comparator reference. Its push-pull RESET output drives high during reset assertion and returns to high-impedance state post-timeout - compatible with µP reset inputs requiring active-high logic.

It integrates a 1.6s watchdog timer cleared by WDI edge transitions, with MR input featuring internal 50kΩ pullup and 200ns glitch rejection. Reset timeout is fixed at 140ms (min), independent of temperature, and the device draws only 25µA max ICC at full temperature range under VCC = +1.8V.

Key Specifications

Pinout & Package

MAX6827VUT+T uses a 6-pin SOT23 package (outline U6+1, land pattern 90-0175), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant matte-tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervision applications.

Compared with MAX6826VUT+T and MAX6828VUT+T, the MAX6827VUT+T uniquely provides active-high push-pull RESET without external components - simplifying interface to modern µPs with dedicated active-high reset inputs while maintaining identical supervision accuracy and low-power operation.

Availability

MAX6827VUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX6827VUT+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, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.

The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail µP supervision in space-constrained, battery-sensitive systems - delivering integrated reset, watchdog, and manual reset functions in a 6-pin SOT23 footprint.

FAQ

What is the exact VCC reset threshold voltage for MAX6827VUT+T across temperature?

The MAX6827VUT+T has a factory-trimmed VCC reset threshold of 1.58V (typical) with min/max values of 1.52V and 1.62V over the full –40°C to +85°C range, and 1.521V to 1.629V over –40°C to +125°C. This threshold applies specifically to the "V" suffix variant and is guaranteed per the Standard Versions Table and Electrical Characteristics section of the datasheet.

Does MAX6827VUT+T support monitoring a secondary voltage lower than 0.9V?

Yes - MAX6827VUT+T supports secondary voltage monitoring down to 0.63V (typical) via its RESET IN pin, which connects to an internal 0.63V comparator reference. Using an external resistor divider, users can configure monitoring of voltages as low as ~0.63V (e.g., 0.65V core supplies), unlike the fixed VCC2 monitors in MAX6829–MAX6831 that start at 0.9V.

What is the reset output behavior of MAX6827VUT+T during power-up?

During power-up, MAX6827VUT+T asserts its active-high push-pull RESET output low until VCC rises above 1.58V and remains above threshold for the internal reset timeout period (140ms min). After timeout, RESET goes high and stays high unless triggered again by VCC drop, MR assertion, or watchdog timeout - ensuring clean µP initialization.

Can the watchdog timer in MAX6827VUT+T be disabled without hardware modification?

Yes - the watchdog timer in MAX6827VUT+T is automatically disabled when the WDI pin is left unconnected or driven by a three-stated output. In this state, the internal watchdog driver toggles WDI every ~1.4s, preventing timeout; no PCB change or jumper is needed to disable watchdog functionality.

Is MAX6827VUT+T pin-compatible with other members of the MAX6826–MAX6831 family?

Yes - MAX6827VUT+T shares identical 6-pin SOT23 pinout and package dimensions with all MAX6826–MAX6831 variants. Pin functions (VCC, GND, MR, WDI, RESET IN, RESET) are consistent across the family; only RESET polarity (active-high vs. active-low vs. open-drain) and internal monitoring configuration differ - enabling drop-in replacement where function matches.