Analog Devices Inc./Maxim Integrated MAX6719UTYHD3+T

Overview

MAX6719UTYHD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23-6 package, monitoring VCC1 (1.575V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference) with 210ms minimum reset timeout. It features open-drain active-low RST output, manual reset input (MR), and operates from -40°C to +85°C for reliable power sequencing in multivoltage embedded systems.

For engineers reviewing the MAX6719UTYHD3+T datasheet, MAX6719UTYHD3+T pinout, MAX6719UTYHD3+T application, or MAX6719UTYHD3+T equivalent, key selection factors include dual-supply monitoring with factory-trimmed thresholds, RSTIN-based third-voltage supervision down to 0.62V, guaranteed reset validity at VCC1/VCC2 ≥ 0.8V, and compatibility with low-power portable and industrial control designs requiring precise brownout detection.

Technical Context

The MAX6719UTYHD3+T implements independent voltage comparators for primary (VCC1), secondary (VCC2), and auxiliary (RSTIN) supplies, each with hysteresis (0.5% of threshold) and temperature-stable references (20ppm/°C). Its reset logic asserts RST when any monitored voltage falls below its threshold and holds it low for a fixed 210ms (min) timeout after all voltages recover.

It integrates a high-impedance MR input with 50kΩ internal pullup, supports noise-immune operation down to 0.8V supply, and delivers ultra-low quiescent current (14µA typ at 3.6V). The device uses BiCMOS process (1072 transistors) and is not equipped with watchdog or power-fail functionality - confirmed by Selector Guide and Pin Description tables.

Key Specifications

Pinout & Package

MAX6719UTYHD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix), with gull-wing leads and standard thermal pad layout per JEDEC MO-178AB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6719UTYHD3+T, MAX6720UTYHD3+T offers push-pull drive but forfeits bus-sharing flexibility, while TPS3808G33DBVR reduces feature set to cut cost but eliminates the critical third-voltage monitoring needed for modern multirail SoC power domains.

Availability

MAX6719UTYHD3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, portable medical device power management, telecom line card voltage integrity, and automotive infotainment module startup requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6719UTYHD3+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 demanding industrial, computing, and communications applications.

The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory solutions optimized for multivoltage embedded systems where space, power, and reliability are critical constraints.

FAQ

What is the exact reset threshold voltage for VCC1 on the MAX6719UTYHD3+T?

The MAX6719UTYHD3+T has a factory-trimmed VCC1 reset threshold of 1.575V (typical), with min/max values of 1.530V and 1.620V across temperature and process variation. This value is encoded in the 'Y' suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified in the Electrical Characteristics table on page 2 of the datasheet.

Does the MAX6719UTYHD3+T include a watchdog timer function?

No, the MAX6719UTYHD3+T does not include a watchdog timer. According to the Selector Guide and Pin Description tables, only MAX6721 through MAX6729 variants support WDI functionality. The MAX6719UTYHD3+T is a triple-supply supervisor with RSTIN, MR, and open-drain RST - no WDI pin is allocated or functional.

Can the MAX6719UTYHD3+T monitor a 0.9V core supply using the RSTIN pin?

Yes, the MAX6719UTYHD3+T can monitor a 0.9V supply via RSTIN using an external resistor divider. With a 626.5mV internal reference, a divider ratio of R1/R2 = (0.9V / 0.6265V) − 1 ≈ 0.436 achieves precise trip point. The RSTIN input leakage (±25nA) ensures minimal error with standard 100kΩ–1MΩ resistors.

What is the reset timeout period for the MAX6719UTYHD3+T, and is it adjustable?

The MAX6719UTYHD3+T has a fixed minimum reset timeout period of 210ms, indicated by the 'D3' suffix in its part number. This value is not user-adjustable - it is factory-set and guaranteed over temperature. The timeout begins after all monitored supplies rise above their thresholds and ends with RST deassertion.

Is the MAX6719UTYHD3+T pin-compatible with other devices in the MAX6715–MAX6729 family?

Yes, the MAX6719UTYHD3+T shares the same 6-pin SOT23-6 footprint and pinout with MAX6715, MAX6716, MAX6721, and MAX6722. However, functional differences exist: MAX6715 lacks RSTIN, MAX6716 uses push-pull RST, and MAX6721 adds watchdog input - direct substitution requires verification of required features and output type.