Analog Devices Inc./Maxim Integrated MAX6716AUTLTD2+T

Overview

MAX6716AUTLTD2+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 8.8ms minimum reset timeout, push-pull active-low RST output, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and industrial controller brownout protection.

For engineers reviewing the MAX6716AUTLTD2+T datasheet, MAX6716AUTLTD2+T pinout, MAX6716AUTLTD2+T application, or MAX6716AUTLTD2+T equivalent, key selection criteria include dual-rail voltage monitoring capability, 8.8ms reset timeout period, push-pull RST output logic compatibility with 3.3V/5V μP reset inputs, and operation across –40°C to +125°C for automotive-grade embedded systems.

Technical Context

The MAX6716AUTLTD2+T implements independent dual-voltage comparators with internal 4.625V (VTH1) and 3.075V (VTH2) thresholds referenced to VCC1 and VCC2 respectively, each feeding a shared reset timeout timer. Its push-pull RST output is driven from VCC1 and asserts low when either supply falls below its threshold, maintaining assertion for ≥8.8ms after both supplies recover.

This device integrates no watchdog, manual-reset, or power-fail features - confirmed by suffix "T" (no WDI, MR, PFI/PFO) and pin mapping: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR (NC), Pin 4 = VCC2, Pin 5 = VCC1, Pin 6 = unused - matching MAX6716A variant with D2 timeout and T reset logic configuration.

Key Specifications

Pinout & Package

MAX6716AUTLTD2+T is housed in a 6-pin SOT23-6 package (package code U6+1), with 1.6mm × 2.9mm footprint and 0.95mm height, optimized for high-density PCB layouts in space-constrained telecom modules and motor drive controllers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715AUTLTD2+T, the MAX6716AUTLTD2+T provides higher VCC1/VCC2 thresholds for tighter 5V/3.3V rail regulation compliance, while TLV809E33DBZR offers lower cost but sacrifices dual-rail coordination and push-pull drive - making MAX6716AUTLTD2+T optimal for systems requiring precise, synchronized multi-rail reset timing.

Availability

MAX6716AUTLTD2+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive electronics requiring stable component supply with guaranteed long-term manufacturability and AEC-Q100-aligned reliability.

Supply support for MAX6716AUTLTD2+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, emphasizing robustness, low power, and high integration.

The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits targeting multirail embedded systems where simultaneous power-rail monitoring and deterministic reset timing are critical for functional safety.

FAQ

What is the exact reset threshold voltage for VCC1 on MAX6716AUTLTD2+T?

The MAX6716AUTLTD2+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with a tolerance of ±125mV (4.500V to 4.750V). This value is fixed by the "L" suffix in the ordering code and verified across –40°C to +125°C per the MAX6715A–MAX6729A datasheet Electrical Characteristics table.

Does MAX6716AUTLTD2+T support manual reset functionality?

No, MAX6716AUTLTD2+T does not implement manual reset. Pin 3 (MR) is internally pulled up to VCC1 but left unconnected per the MAX6716A variant definition - confirmed by absence of MR-related features in its selector guide entry and omission from functional diagram. The device relies solely on voltage-monitoring-triggered reset.

What is the reset timeout period for MAX6716AUTLTD2+T and how is it set?

The MAX6716AUTLTD2+T provides an 8.8ms minimum reset timeout period, designated by the "D2" suffix. This fixed timeout is implemented via internal RC timing and requires no external components. It ensures sufficient reset assertion duration for boot ROM initialization and PLL lock sequences in microprocessors.

Is MAX6716AUTLTD2+T compatible with 3.3V-only systems?

MAX6716AUTLTD2+T requires both VCC1 (5V nominal) and VCC2 (3.3V nominal) to be present and within specification (VCC1 ≥ 0.8V, VCC2 ≥ 0.8V) for guaranteed operation. It cannot function with only a 3.3V supply because VCC1 powers the core logic and RST driver - using only VCC2 will result in undefined reset behavior.

What package type and footprint does MAX6716AUTLTD2+T use?

MAX6716AUTLTD2+T uses a 6-pin SOT23-6 package (outline 21-0058, land pattern 90-0175), with 0.95mm height, 1.6mm × 2.9mm body, and 0.95mm pitch. The package code is U6+1, and Pin 6 is NC - requiring no solder connection and no copper pour beneath per thermal guidelines.