Analog Devices Inc./Maxim Integrated MAX6715AUTVDD3+T

Overview

MAX6715AUTVDD3+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 (VTH1 = 4.625V typ, VTH2 = 3.075V typ), 1.65ms min reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. It delivers reliable power-on reset and brownout detection for multivoltage embedded systems.

For engineers reviewing the MAX6715AUTVDD3+T datasheet, MAX6715AUTVDD3+T pinout, MAX6715AUTVDD3+T application, or MAX6715AUTVDD3+T equivalent, key selection criteria include dual-rail threshold accuracy (±1.5% over temp), low 15µA typical supply current at 3.6V, push-pull active-low RST output referenced to VCC1, and -40°C to +125°C operation without external components.

Technical Context

The MAX6715AUTVDD3+T integrates two independent voltage comparators with internal 20ppm/°C tempco references and hysteresis (0.5% of VTH), feeding a digital reset timeout timer with fixed 1.65ms minimum delay. Its architecture guarantees correct reset logic state even during deep undervoltage (≥0.8V on either rail), eliminating need for external supervision of core/I/O supply sequencing.

It features a dedicated MR input with 50kΩ internal pullup to VCC1, 1µs minimum pulse width support, and 200ns MR-to-RST assertion delay. No watchdog, PFI, RSTIN, or secondary RST2 functionality is present - this variant is strictly dual-supply, single-push-pull-reset, no auxiliary inputs.

Key Specifications

Pinout & Package

MAX6715AUTVDD3+T is housed in a 5-pin SOT23-5 package (package code U5+1, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°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 MAX6716AUTVDD3+T (140ms timeout) and TPS3808G33DBVR (single-rail, open-drain), MAX6715AUTVDD3+T uniquely delivers precise dual-rail monitoring with minimal 1.65ms reset hold - ideal for fast-boot embedded controllers where timing predictability and rail independence are critical.

Availability

MAX6715AUTVDD3+T is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, telecom line cards, and medical infusion pump controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MAX6715AUTVDD3+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, with emphasis on reliability, low power, and high integration.

The MAX6715A–MAX6729A family delivers compact, factory-trimmed supervisory circuits for multivoltage systems - engineered to replace discrete reset solutions while guaranteeing operation down to 0.8V and supporting AEC-Q100-relevant environments.

FAQ

What is the exact reset threshold voltage for VCC1 on MAX6715AUTVDD3+T?

The MAX6715AUTVDD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with ±1.5% tolerance over -40°C to +125°C. This value corresponds to the "VDD3" suffix in the part number and is optimized for monitoring standard 5V I/O rails with 375mV hysteresis margin. The threshold is guaranteed functional down to VCC1 = 0.8V.

Does MAX6715AUTVDD3+T support monitoring a third voltage rail?

No, MAX6715AUTVDD3+T does not support third-rail monitoring. It is a dual-supply supervisor only, with dedicated VCC1 and VCC2 inputs. Models like MAX6719A or MAX6723A include RSTIN for adjustable third-rail monitoring; MAX6715AUTVDD3+T lacks RSTIN, WDI, PFI, and RST2 pins entirely - its 5-pin SOT23-5 package contains only RST, GND, MR, VCC2, and VCC1.

What is the reset timeout period for MAX6715AUTVDD3+T and how is it implemented?

The MAX6715AUTVDD3+T features a fixed 1.65ms minimum reset timeout period (suffix "D2"), implemented via an internal digital timer that starts upon any reset assertion event (VCC1/VCC2 undervoltage, MR low). The timer is temperature-stable (20ppm/°C) and does not require external components. Reset remains asserted for ≥1.65ms after all monitored supplies exceed their thresholds.

Is MAX6715AUTVDD3+T compatible with push-pull or open-drain microprocessor reset inputs?

MAX6715AUTVDD3+T provides a push-pull active-low RST output referenced to VCC1, making it directly compatible with µP reset pins requiring driven high/low signals (e.g., most ARM Cortex-M, Renesas RX, and NXP S32K families). It is not compatible with open-drain-only reset interfaces without series isolation; no external pullup is needed due to its integrated output driver.

What is the supply current consumption of MAX6715AUTVDD3+T across operating conditions?

MAX6715AUTVDD3+T draws 15µA typical supply current at 3.6V with all I/Os open and outputs not asserted. At 1.8V, ICC1 drops to 10µA typical. Total current remains ≤39µA maximum across 0.8V–5.5V VCC1/VCC2 range and -40°C to +125°C, enabling deployment in energy-constrained applications such as battery-backed industrial sensors.