Analog Devices Inc./Maxim Integrated MAX6830SVUT

Overview

MAX6830SVUT from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring primary supply (VCC) at 2.93V and secondary supply (VCC2) at 1.575V with ±1.5% threshold accuracy, 140ms minimum reset timeout, 1.6s watchdog period, and push-pull active-high RESET output - used in portable battery-powered equipment and multivoltage embedded controllers to prevent code-execution errors during brownout.

For engineers reviewing the MAX6830SVUT datasheet, MAX6830SVUT pinout, MAX6830SVUT application, or MAX6830SVUT equivalent, this page delivers verified functional identity, exact reset thresholds, watchdog timing behavior, manual reset interface details, and validated alternative options for dual-supply µP supervision in automotive-grade (-40°C to +125°C) designs.

Technical Context

The MAX6830SVUT implements a dual-threshold comparator architecture: one factory-trimmed input (VCC2) monitors secondary supplies down to +0.9V with 1.575V nominal threshold (suffix V), and a second primary monitor (VCC) operates at 2.93V (suffix S). It integrates a 1.6s watchdog timer cleared by WDI edge transitions and a 140ms reset timeout generator that holds RESET asserted after all monitored voltages recover.

Its push-pull active-high RESET output sources up to 800µA at VCC ≥ 4.75V while maintaining VOH ≥ 0.8 × VCC; MR features an internal 50kΩ pullup and accepts CMOS-level logic; WDI detects ≥50ns pulses and disables automatically when left unconnected or three-stated.

Key Specifications

Pinout & Package

SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, lead-free compatible (RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply µP supervision applications.

Compared with MAX6830SVUT, MAX6827SVUT offers identical voltage monitoring but inverted RESET polarity, requiring design-level logic adaptation; TPS3808G18DBVR reduces functionality by omitting VCC2 supervision and watchdog, limiting suitability to simpler single-rail systems.

Availability

MAX6830SVUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and automotive systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6830SVUT 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 power, sensing, and interface applications, with focus on reliability and integration for demanding environments.

The MAX6826–MAX6831 family was engineered specifically for dual-rail microprocessor supervision in space-constrained, battery-sensitive, and thermally harsh applications - delivering factory-trimmed thresholds, integrated watchdog, and guaranteed operation down to VCC = +1.0V.

FAQ

What is the exact VCC2 reset threshold voltage for MAX6830SVUT?

The MAX6830SVUT has a factory-trimmed VCC2 reset threshold of 1.575V (±1.5%) over -40°C to +125°C, as defined by the 'V' suffix in its part number. This value is specified in the Electrical Characteristics table under VTH2, with min/typ/max values of 1.521V/1.575V/1.629V at full temperature range. The threshold applies exclusively to the VCC2 pin and is independent of VCC voltage.

Does MAX6830SVUT support watchdog functionality, and what is its timeout behavior?

Yes, MAX6830SVUT includes a watchdog timer with a nominal timeout period of 1.6s. The timer resets on any rising or falling edge at the WDI pin and is automatically disabled if WDI is left unconnected or driven high/low continuously beyond the timeout window. Over temperature, the actual timeout varies from 0.80s to 2.60s, as documented in the Electrical Characteristics table under tWD.

What is the RESET output configuration of MAX6830SVUT, and how does it interface with microcontrollers?

MAX6830SVUT features a push-pull active-high RESET output. When asserted, RESET goes high (VOH ≥ 0.8 × VCC); when deasserted, it goes low (VOL ≤ 0.4V at ISINK = 3.2mA). This eliminates the need for an external pullup resistor and allows direct connection to microcontrollers with active-high reset inputs, such as many ARM Cortex-M series devices.

Can MAX6830SVUT monitor a 1.2V supply, and if not, what are the limitations?

No, MAX6830SVUT cannot reliably monitor a 1.2V supply. Its VCC2 input is factory-trimmed to 1.575V (suffix V), with a minimum guaranteed threshold of 1.521V over temperature. A 1.2V rail falls outside the valid detection range and would never trigger reset. For 1.2V supervision, select MAX6831 with 'D' suffix (1.110V threshold) or MAX6826/MAX6827/MAX6828 with adjustable RESET IN input.

What is the minimum VCC voltage at which MAX6830SVUT guarantees correct RESET assertion?

MAX6830SVUT guarantees correct RESET assertion down to VCC = +1.0V, as explicitly stated in the General Description and Absolute Maximum Ratings sections. Below this voltage, reset behavior is not characterized. This specification ensures reliable operation during deep brownout conditions typical in battery-powered systems approaching end-of-life.