Analog Devices Inc./Maxim Integrated MAX6719AUTWGD3+T

Overview

MAX6719AUTWGD3+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 RST output when either supply drops below threshold and maintains reset for ≥140ms after recovery - used in telecom power management and industrial embedded controllers requiring reliable brownout detection.

For engineers reviewing the MAX6719AUTWGD3+T datasheet, MAX6719AUTWGD3+T pinout, MAX6719AUTWGD3+T application, or MAX6719AUTWGD3+T equivalent, this page delivers verified specifications including dual-supply monitoring range, 140ms reset timeout, 14µA typical supply current at 3.6V, guaranteed reset validity down to VCC1/VCC2 = 0.8V, and SOT23-6 pin-compatible supervision for multivoltage systems.

Technical Context

The MAX6719AUTWGD3+T implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds and 0.5% hysteresis, plus an external RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset logic combines ORed fault conditions (VCC1/VCC2 undervoltage, RSTIN low, MR asserted) and guarantees correct RST output state even when VCC1 or VCC2 falls as low as 0.8V.

It features a push-pull RST output referenced to VCC1, manual-reset input with 50kΩ internal pullup, and supports watchdog disable via open WDI pin. The device operates across –40°C to +125°C and uses no external components for basic dual-supply supervision - enabling compact, robust reset control in space-constrained industrial and telecom designs.

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 on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720AUTWGD3+T and TPS3808G33DBVR, the MAX6719AUTWGD3+T uniquely delivers push-pull RST output, dual independent supply monitoring, and adjustable third-rail supervision in one SOT23-6 device - reducing BOM count and PCB area in multivoltage embedded systems.

Availability

MAX6719AUTWGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive ADAS modules, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6719AUTWGD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6715A–MAX6729A family was designed specifically for multivoltage microprocessor systems requiring guaranteed reset behavior down to 0.8V, ultra-low quiescent current, and compact SOT23 packaging - targeting space-constrained, reliability-critical embedded applications.

FAQ

What is the reset timeout period for MAX6719AUTWGD3+T?

The MAX6719AUTWGD3+T has a minimum reset timeout period of 140ms (D3 suffix). This duration is guaranteed over the full –40°C to +125°C operating temperature range and ensures the microprocessor remains held in reset long enough for power rails to stabilize after brownout recovery. The timeout begins when all monitored voltages exceed their thresholds and ends with RST deassertion.

Does MAX6719AUTWGD3+T support monitoring a third voltage rail?

Yes, MAX6719AUTWGD3+T supports third-rail monitoring via its RSTIN pin, which compares the applied voltage against an internal 626.5mV reference. By connecting an external resistor divider from VCCx to GND with RSTIN at the midpoint, designers can set custom trip points - for example, monitoring a 1.2V rail with ~1.92MΩ/1MΩ divider to trigger reset at 1.2V ±1.5%.

What is the function of the MR pin on MAX6719AUTWGD3+T?

The MR (Manual Reset) pin on MAX6719AUTWGD3+T is an active-low input with a 50kΩ internal pullup to VCC1. Pulling MR low for ≥1µs forces an immediate reset assertion, and RST remains low for the full 140ms timeout period after MR returns high. This enables hardware-initiated resets via pushbutton or system-level fault signals without software intervention.

Can MAX6719AUTWGD3+T operate with VCC1 = 0.9V?

Yes, MAX6719AUTWGD3+T is guaranteed to maintain valid reset output logic states when VCC1 or VCC2 remains ≥0.8V. At VCC1 = 0.9V, the device continues monitoring both supplies and asserts RST correctly if either falls below its threshold. However, RST output high level is specified as 0.8×VCC1, so at 0.9V it drives ~0.72V - sufficient for interfacing with 0.8V logic families.

What package type does MAX6719AUTWGD3+T use?

MAX6719AUTWGD3+T uses the SOT23-6 surface-mount package (Package Code U6+1), measuring 1.6mm × 2.9mm with 0.95mm pitch. This compact footprint supports high-density PCB layouts in space-constrained applications like optical transceivers and wearable medical sensors, while maintaining thermal performance of θJA = 115°C/W on multilayer boards.