Analog Devices Inc./Maxim Integrated MAX6715AUTSYD3+T

Overview

MAX6715AUTSYD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-5 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and multivoltage embedded systems.

For engineers reviewing the MAX6715AUTSYD3+T datasheet, MAX6715AUTSYD3+T pinout, MAX6715AUTSYD3+T application, or MAX6715AUTSYD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% typical), low 14µA supply current at 3.6V, SOT23-5 thermal performance (θJA = 324.3°C/W on 4-layer board), and compatibility with manual-reset, watchdog-disabled configurations.

Technical Context

The MAX6715AUTSYD3+T implements independent voltage comparators for VCC1 and VCC2, each with 0.5% hysteresis referenced to typical threshold, and asserts active-low open-drain RST when either supply falls below its trimmed threshold. Reset remains asserted for a fixed 140ms (min) after both supplies recover above threshold.

It features a dedicated MR input with internal 50kΩ pullup to VCC1, supports CMOS-level manual reset triggering with 1µs minimum pulse width, and guarantees correct RST logic state across -40°C to +125°C ambient while operating from VCC1 ≥ 0.8V or VCC2 ≥ 0.8V - no external biasing required for valid reset assertion at brownout.

Key Specifications

Pinout & Package

SOT23-5 package (package code U5+1), 5-pin surface-mount outline (JEDEC MO-178AA), footprint land pattern 90-0174, thermal resistance θJA = 324.3°C/W (4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715AUTSYD3+T, MAX6316HUT46D3+ simplifies design for single-rail systems but removes dual-supply fault coverage, while TPS3808G125DBVR offers threshold flexibility at the cost of added components and loss of integrated MR pullup and VCC2 monitoring.

Availability

MAX6715AUTSYD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.

Supply support for MAX6715AUTSYD3+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 dual/triple supervisory circuits optimized for multirail systems where simultaneous monitoring of core and I/O supplies is essential for robust boot and runtime integrity.

FAQ

What is the reset timeout period for MAX6715AUTSYD3+T?

The MAX6715AUTSYD3+T has a fixed minimum reset timeout period of 140ms. This value is factory-trimmed and guaranteed over the full -40°C to +125°C operating temperature range. The timeout begins when VCC1 and VCC2 both rise above their respective reset thresholds and ends after 140ms, ensuring sufficient hold time for microprocessor initialization and peripheral stabilization before release.

Does MAX6715AUTSYD3+T support manual reset functionality?

Yes, MAX6715AUTSYD3+T includes an active-low manual-reset input (MR) on Pin 3 with an internal 50kΩ pullup resistor to VCC1. Driving MR low for ≥1µs forces an immediate reset assertion, which remains active for the full 140ms timeout period after MR returns high. No external pullup is required, simplifying PCB layout and reducing BOM count.

What are the voltage monitoring ranges supported by MAX6715AUTSYD3+T?

MAX6715AUTSYD3+T monitors two independent supplies: VCC1 (primary) from 1.8V to 5.0V and VCC2 (secondary) from 0.9V to 3.3V. Both thresholds are factory-trimmed - the "SY" suffix indicates VCC1 = 3.075V (±1.5%) and VCC2 = 2.925V (±1.5%). Operation is guaranteed down to VCC1 or VCC2 = 0.8V, enabling reliable brownout detection.

Is MAX6715AUTSYD3+T compatible with open-drain and push-pull reset outputs?

MAX6715AUTSYD3+T provides an open-drain RST output (Pin 1), requiring an external pullup resistor. It does not support push-pull RST - that variant is found in the MAX6716A/MAX6718A series. The open-drain configuration allows level-shifting and wired-OR reset bus implementation, making it suitable for systems with mixed-voltage domains.

What is the supply current consumption of MAX6715AUTSYD3+T at 3.6V?

At VCC1 = 3.6V, the typical supply current (ICC1) of MAX6715AUTSYD3+T is 14µA, with a maximum of 39µA over temperature and process variation. This ultra-low quiescent current is critical for battery-operated equipment and energy-sensitive applications where standby power budget is constrained.