Analog Devices Inc./Maxim Integrated MAX6719AUTTWD1/V+T

Overview

MAX6719AUTTWD1/V+T from Maxim Integrated is an AEC-Q100 qualified dual-supply 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 adjustable RSTIN input for third-voltage monitoring down to 0.62V. It delivers guaranteed reset validity down to VCC1 or VCC2 = 0.8V and supports automotive-grade reliability in engine control units and ADAS power management.

For engineers reviewing the MAX6719AUTTWD1/V+T datasheet, MAX6719AUTTWD1/V+T pinout, MAX6719AUTTWD1/V+T application, or MAX6719AUTTWD1/V+T equivalent, key selection criteria include dual-rail voltage monitoring capability, AEC-Q100 qualification, 14µA typical supply current at 3.6V, RSTIN-adjustable threshold, and SOT23-6 footprint compatibility with automotive PCB layouts.

Technical Context

The MAX6719AUTTWD1/V+T implements independent dual-voltage comparators with internal 0.626V reference for RSTIN, hysteresis of 0.5% on reset thresholds, and a 20µs VCC-to-reset delay. Its reset logic remains valid across -40°C to +125°C with guaranteed operation at VCC ≥ 0.8V, enabling robust brownout detection in safety-critical automotive subsystems.

It integrates a watchdog timer with 35s minimum startup period and 1.12s minimum normal timeout, manual-reset input with 50kΩ internal pullup to VCC1, and push-pull RST output referenced to VCC1 - all configured via fixed suffix coding (TTWD1 indicates specific VTH1/VTH2 thresholds and D1 timeout).

Key Specifications

Pinout & Package

MAX6719AUTTWD1/V+T uses the 6-pin SOT23-6 package (package code U6+1), with thermal resistance θJA = 115°C/W on multilayer board and θJC = 80°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720AUTTWD1/V+T, the MAX6719AUTTWD1/V+T provides higher VTH1/VTH2 thresholds ideal for 3.3V systems with wider tolerance, while TLV809E33DBVR offers lower cost and smaller footprint at the expense of automotive qualification, dual-rail capability, and design flexibility.

Availability

MAX6719AUTTWD1/V+T is available at Aetrix Electronics and suitable for automotive engine control, ADAS domain controllers, and body electronics requiring stable component supply with AEC-Q100 compliance and extended temperature operation.

Supply support for MAX6719AUTTWD1/V+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 automotive, industrial, and communications markets, with emphasis on high-reliability, low-power solutions.

The MAX6715A–MAX6729A family delivers ultra-low-voltage microprocessor supervision for safety-critical automotive systems, integrating dual/third-rail monitoring, watchdog, and manual reset in miniature SOT23 packages.

FAQ

What is the reset timeout period for MAX6719AUTTWD1/V+T?

The MAX6719AUTTWD1/V+T has a D1 suffix indicating a minimum reset timeout period of 1.1ms. This value is factory-trimmed and guaranteed over -40°C to +125°C. The timeout begins when VCC1 or VCC2 rises above its respective threshold and ends after the fixed interval, ensuring sufficient hold time for microcontroller initialization before release. MAX6719AUTTWD1/V+T does not support programmable timeout adjustment.

Does MAX6719AUTTWD1/V+T support monitoring a third voltage rail?

Yes, MAX6719AUTTWD1/V+T supports third-rail 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, designers can set custom reset thresholds down to 0.62V. This capability is confirmed in the device's Electrical Characteristics table and Functional Diagram, and applies specifically to MAX6719AUTTWD1/V+T per its ordering suffix.

What is the operating temperature range of MAX6719AUTTWD1/V+T?

MAX6719AUTTWD1/V+T operates from -40°C to +125°C, fully qualified per AEC-Q100 Grade 0 requirements. This extended range is validated across all electrical parameters including reset thresholds, supply current, and watchdog timing. The specification is explicitly stated in the Absolute Maximum Ratings and Operating Conditions sections of the official datasheet for MAX6719AUTTWD1/V+T.

Is MAX6719AUTTWD1/V+T pin-compatible with other devices in the MAX6715A–MAX6729A family?

MAX6719AUTTWD1/V+T uses the SOT23-6 package with pinout matching MAX6717A/MAX6718A/MAX6721A/MAX6722A/MAX6725A/MAX6726A/MAX6727A/MAX6728A/MAX6729A/MAX6797A variants. Pin functions (VCC1, VCC2, GND, MR, RST, RSTIN) are identical across these 6-pin members. However, feature availability (e.g., watchdog, PFI/PFO) varies by part number - MAX6719AUTTWD1/V+T includes RSTIN and watchdog but not PFI/PFO.

What is the supply current consumption of MAX6719AUTTWD1/V+T at 3.6V?

At VCC1 < 3.6V with all I/O connections open and outputs not asserted, MAX6719AUTTWD1/V+T draws 10µA (typical) and up to 28µA (maximum). This ultra-low ICC1 value is measured under specified conditions and confirmed in the Electrical Characteristics table. The low quiescent current enables use in always-on automotive modules without compromising battery drain budgets.