Analog Devices Inc./Maxim Integrated MAX6719AUTTGD1+T

Overview

MAX6719AUTTGD1+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, 1.1ms minimum reset timeout, and RSTIN-adjustable third-voltage monitoring down to 0.62V. It asserts active-low push-pull reset during supply undervoltage, manual reset, or watchdog timeout - used in telecom power management and multivoltage embedded systems.

For engineers reviewing the MAX6719AUTTGD1+T datasheet, MAX6719AUTTGD1+T pinout, MAX6719AUTTGD1+T application, or MAX6719AUTTGD1+T equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, immunity to short VCC transients, and support for externally adjustable RSTIN threshold with 626.5mV internal reference.

Technical Context

The MAX6719AUTTGD1+T integrates dual independent voltage comparators with hysteresis (0.5% of threshold), a precision 626.5mV internal reference for RSTIN, and a dual-mode watchdog timer featuring 35s minimum startup period and 1.12s minimum normal timeout. Its reset logic remains valid across -40°C to +125°C while maintaining output drive capability even as VCC1 or VCC2 drops to 0.8V.

It supports push-pull RST/RST1 outputs referenced to VCC1 and includes MR input with 50kΩ internal pullup, WDI for processor activity monitoring, and RSTIN for auxiliary voltage supervision via resistor divider. The device operates without external components for basic supervision but allows configurable timing and thresholds where needed.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720AUTTGD1+T and TPS3808G12DBVR, the MAX6719AUTTGD1+T uniquely delivers push-pull reset, dual independent supply monitoring, and RSTIN-based third-rail supervision in one SOT23-6 package - enabling compact, robust power sequencing in multivoltage systems without layout compromise.

Availability

MAX6719AUTTGD1+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply, extended temperature operation, and guaranteed reset validity down to 0.8V.

Supply support for MAX6719AUTTGD1+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.

The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems where simultaneous monitoring of primary, secondary, and auxiliary supplies is essential for system reliability.

FAQ

What is the reset timeout period for MAX6719AUTTGD1+T?

The MAX6719AUTTGD1+T has a minimum reset timeout period of 1.1ms (suffix D1), guaranteed over -40°C to +125°C. This value is factory-trimmed and does not require external components. The timeout begins when any monitored supply falls below its threshold and ends after all supplies exceed their thresholds plus hysteresis, ensuring clean system restart without premature release.

Does MAX6719AUTTGD1+T support monitoring a third voltage supply?

Yes, MAX6719AUTTGD1+T supports third-supply monitoring via the RSTIN pin, which features a precise 626.5mV internal reference. By connecting an external resistor divider between the target supply and ground, users can set custom reset thresholds down to 0.62V. The RSTIN input draws only ±100nA, enabling high-impedance, low-power monitoring.

What is the operating voltage range for VCC1 and VCC2 on MAX6719AUTTGD1+T?

MAX6719AUTTGD1+T operates with VCC1 and VCC2 each ranging from 0.8V to 5.5V. Both supplies are independently monitored, and the device guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V - critical for brownout resilience in automotive and portable applications.

Is MAX6719AUTTGD1+T compatible with manual reset functionality?

Yes, MAX6719AUTTGD1+T includes an active-low manual-reset input (MR) with internal 50kΩ pullup to VCC1. Pulling MR low forces immediate reset assertion, which persists for the full reset timeout period after MR returns high. No external components are needed, and MR accepts standard CMOS logic levels.

What watchdog timer modes does MAX6719AUTTGD1+T support?

MAX6719AUTTGD1+T implements a dual-mode watchdog timer: a 35s minimum startup period after reset (allowing full system initialization) followed by a 1.12s minimum normal timeout during runtime. The timer clears on any WDI edge transition and asserts reset if WDI remains static beyond the applicable timeout - providing both boot flexibility and runtime safety.