Analog Devices Inc./Maxim Integrated MAX6719AUTTGD3+T

Overview

MAX6719AUTTGD3+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 adjustable RSTIN input for third-voltage monitoring down to 0.626V. It asserts active-low push-pull reset during supply undervoltage, manual reset, or watchdog timeout-used in telecom power management and industrial embedded controllers.

For engineers reviewing the MAX6719AUTTGD3+T datasheet, MAX6719AUTTGD3+T pinout, MAX6719AUTTGD3+T application, or MAX6719AUTTGD3+T equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14μA typical supply current at 3.6V, immunity to sub-20µs VCC transients, and support for triple-voltage monitoring via RSTIN with 626mV internal reference.

Technical Context

The MAX6719AUTTGD3+T implements dual independent voltage comparators with hysteresis (0.5% of threshold), a programmable reset timeout timer (140ms min), and an adjustable auxiliary monitor input (RSTIN) referenced to a precision 626mV internal bandgap. Its reset logic guarantees correct output state even when either VCC1 or VCC2 drops to 0.8V, enabling robust brownout detection in multirail systems.

This device integrates a manual-reset input (MR) with 50kΩ internal pullup to VCC1, supports push-pull reset output referenced to VCC1, and features low-leakage RSTIN input (±100nA) enabling high-impedance resistor-divider networks for third-supply monitoring. It operates across –40°C to +125°C and meets AEC-Q100 requirements for automotive-grade reliability.

Key Specifications

Pinout & Package

SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 1.1mm height, thermal resistance θJA = 115°C/W (multilayer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720AUTTGD3+T, the MAX6719AUTTGD3+T provides direct push-pull drive eliminating external components, while versus TPS3808G33DBVR it delivers true dual-rail supervision plus configurable third-rail monitoring - essential for complex multivoltage embedded systems.

Availability

MAX6719AUTTGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive ADAS modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6719AUTTGD3+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 demanding industrial, automotive, and communications applications.

The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems where simultaneous monitoring of core, I/O, and auxiliary supplies is required with minimal board space and power budget.

FAQ

What is the reset timeout period for MAX6719AUTTGD3+T?

The MAX6719AUTTGD3+T has a factory-programmed minimum reset timeout period of 140ms (D3 suffix). This duration ensures the microprocessor completes its power-on self-test and initializes peripherals before release from reset. The actual timeout may vary slightly with temperature and supply voltage but remains within specification across –40°C to +125°C.

Does MAX6719AUTTGD3+T support monitoring a third voltage rail?

Yes, MAX6719AUTTGD3+T supports third-rail monitoring via its RSTIN pin, which features a precise 626.5mV internal reference. By connecting an external resistor divider between the target supply and GND, designers can set custom trip points down to 0.62V - enabling supervision of auxiliary rails like camera sensors or RF bias supplies without adding discrete comparators.

What is the function of the MR pin on MAX6719AUTTGD3+T?

The MR (Manual Reset) pin on MAX6719AUTTGD3+T is an active-low input with a 50kΩ internal pullup to VCC1. Pulling MR low forces an immediate reset assertion, which remains active for the full 140ms timeout period after MR returns high. This allows front-panel buttons, test fixtures, or system-level logic to initiate controlled reboots without relying solely on power-rail conditions.

Can MAX6719AUTTGD3+T operate reliably when VCC1 drops below 1.0V?

Yes, MAX6719AUTTGD3+T guarantees valid reset output logic down to VCC1 = 0.8V or VCC2 = 0.8V - a key differentiator for automotive and industrial applications experiencing cold-crank or brownout events. Below 0.8V, reset behavior is not specified, but the device maintains correct state up to that threshold, ensuring deterministic failure response.

What package type and footprint does MAX6719AUTTGD3+T use?

MAX6719AUTTGD3+T uses the SOT23-6 package (package code U6+1), measuring 1.6mm × 2.9mm with 0.95mm pitch. It follows JEDEC MO-178AC outline and requires land pattern 90-0175. This compact 6-pin footprint enables dense PCB layouts in space-constrained applications such as camera modules and handheld medical devices.