Analog Devices Inc./Maxim Integrated MAX6719AUTYHD3+T

Overview

MAX6719AUTYHD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, and RSTIN input for adjustable third-voltage monitoring down to 0.62V. It asserts active-low push-pull RST during supply undervoltage, manual reset, or watchdog timeout-used in telecom power management and industrial embedded systems requiring reliable brownout detection.

For engineers reviewing the MAX6719AUTYHD3+T datasheet, MAX6719AUTYHD3+T pinout, MAX6719AUTYHD3+T application, or MAX6719AUTYHD3+T equivalent, this page delivers verified electrical specs, thermal limits, reset timing behavior, watchdog startup sequence, and exact pin functionality per Maxim's Rev 6 datasheet-enabling accurate BOM validation, PCB layout verification, and system-level reset timing analysis without cross-referencing external documents.

Technical Context

The MAX6719AUTYHD3+T implements dual independent voltage comparators with 20ppm/°C tempco and 0.5% hysteresis referenced to VTH typical, guaranteeing valid reset output down to VCC1 or VCC2 = 0.8V. Its internal reset timeout timer (140ms min) restarts on any threshold violation before expiration, ensuring robust response to cascading supply faults.

This variant includes RSTIN input (626.5mV threshold, ±100nA leakage), push-pull RST output referenced to VCC1, and no WDI or PFI/PFO-distinguishing it from MAX6721A–MAX6729A/MAX6797A variants. It belongs to the MAX6715A–MAX6729A family optimized for multivoltage SoC power sequencing in space-constrained industrial and telecom equipment.

Key Specifications

Pinout & Package

SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, thermal resistance θJA = 115°C/W (multilayer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720AUTYHD3+T and TPS3808G33DBVR, the MAX6719AUTYHD3+T uniquely provides factory-trimmed 2.85V/1.35V dual thresholds plus RSTIN for third-rail flexibility in one SOT23-6 package-making it optimal for compact multivoltage systems where precision and integration are critical.

Availability

MAX6719AUTYHD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, portable medical monitors, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6719AUTYHD3+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 and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing high reliability and extended temperature performance.

The MAX6715A–MAX6729A product line delivers ultra-low-voltage supervisory circuits for multivoltage SoC and MCU systems, targeting applications where simultaneous monitoring of primary, secondary, and auxiliary rails is essential for fail-safe operation.

FAQ

What is the exact reset timeout period for MAX6719AUTYHD3+T?

The MAX6719AUTYHD3+T has a guaranteed minimum reset timeout period of 140ms, corresponding to the 'D3' suffix in its ordering code. This value is production-tested and applies across the full −40°C to +125°C operating range. The actual timeout may extend up to 280ms depending on process variation and temperature, but system design must rely on the 140ms minimum for timing-critical initialization sequences. MAX6719AUTYHD3+T does not include watchdog or power-fail features that would alter this base timeout.

Does MAX6719AUTYHD3+T support monitoring a third voltage supply?

Yes, MAX6719AUTYHD3+T supports third-voltage monitoring via its RSTIN pin, which features a precise 626.5mV internal reference voltage. By connecting an external resistor divider between the target supply and ground, with the midpoint fed to RSTIN, designers can set custom trip points-for example, monitoring a 1.2V rail with a 1.91kΩ/1.0kΩ divider yields a 1.20V threshold. MAX6719AUTYHD3+T guarantees RSTIN input leakage ≤±100nA, enabling high-resistance dividers to minimize system power consumption.

What are the valid voltage thresholds for VCC1 and VCC2 on MAX6719AUTYHD3+T?

Per Maxim's Reset Voltage Threshold Suffix Guide, MAX6719AUTYHD3+T uses 'Y' for VCC1 (2.850V typical, 2.775V–2.925V min/max) and 'D' for VCC2 (1.350V typical, 1.313V–1.388V min/max). These factory-trimmed thresholds are laser-adjusted during test and do not require external calibration. The device guarantees reset assertion when either supply falls below its respective threshold and maintains reset for ≥140ms after both supplies recover above threshold.

Is MAX6719AUTYHD3+T compatible with push-pull or open-drain reset outputs?

MAX6719AUTYHD3+T provides a push-pull active-low RST output referenced to VCC1, capable of sourcing 200µA at 0.8×VCC1 and sinking 1.2mA at 2.7V. It does not support open-drain configuration. This eliminates the need for an external pullup resistor and ensures fast, rail-to-rail reset transitions-critical for synchronizing with modern low-voltage MCUs. The push-pull architecture also avoids contention issues common with bidirectional reset pins found on some processors.

What is the operating temperature range and thermal performance of MAX6719AUTYHD3+T?

MAX6719AUTYHD3+T operates from −40°C to +125°C and is characterized for full electrical performance across this range. In a standard multilayer PCB, its junction-to-ambient thermal resistance (θJA) is 115°C/W, meaning a 100mW power dissipation raises junction temperature by 11.5°C above ambient. The device's absolute maximum junction temperature is +150°C, and its thermal shutdown is not implemented-reliability depends on maintaining θJA compliance through proper copper pour and airflow.