Analog Devices Inc./Maxim Integrated MAX6715UTWGD3

Overview

MAX6715UTWGD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms minimum reset timeout, push-pull active-low RST output, manual reset input, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and server board management.

For engineers reviewing the MAX6715UTWGD3 datasheet, MAX6715UTWGD3 pinout, MAX6715UTWGD3 application, or MAX6715UTWGD3 equivalent, key selection factors include factory-trimmed dual-threshold accuracy, 14µA typical supply current at 3.6V, immunity to sub-100ns VCC transients, and compatibility with 1.8V–5.0V primary/0.9V–3.3V secondary supply rails.

Technical Context

The MAX6715UTWGD3 implements independent voltage comparators for VCC1 and VCC2, each with 0.5% hysteresis referenced to factory-trimmed thresholds (4.625V and 3.075V), and a digital reset timeout timer that restarts on any threshold violation before timeout completion. It guarantees correct reset logic state when either supply remains ≥0.8V.

Its push-pull RST output drives high to 0.8×VCC1 at 800µA source current and low to ≤0.4V at 3.2mA sink current, while the internal 50kΩ MR pullup enables direct connection of a momentary switch to GND without external components.

Key Specifications

Pinout & Package

MAX6715UTWGD3 is housed in a 6-pin SOT23-6 package (1.6mm × 2.9mm × 1.1mm), RoHS-compliant, with gull-wing leads and thermal pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVR and ADM6710LAKSZ-REEL7, MAX6715UTWGD3 uniquely delivers matched 4.625V/3.075V dual thresholds in a 6-pin SOT23 with push-pull output - optimizing BOM simplicity and timing accuracy for telecom and server dual-rail systems without overengineering.

Availability

MAX6715UTWGD3 is available at Aetrix Electronics and suitable for telecom power sequencing, server board management, and industrial PLC controller applications requiring stable component supply, long-lifecycle support, and guaranteed factory-trimmed voltage thresholds.

Supply support for MAX6715UTWGD3 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 power management, sensing, and interface applications, with emphasis on high-reliability industrial and communications systems.

The MAX6715–MAX6729 family was engineered specifically for ultra-low-voltage, multi-rail microprocessor supervision in space-constrained telecom and computing equipment - prioritizing threshold accuracy, low quiescent current, and robust reset timing.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6715UTWGD3?

The MAX6715UTWGD3 has factory-trimmed reset thresholds of 4.625V for VCC1 (±125mV over temperature) and 3.075V for VCC2 (±75mV over temperature), as defined by the 'W' and 'G' suffixes in the part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are guaranteed across the full -40°C to +85°C operating range and require no external calibration.

Does MAX6715UTWGD3 support manual reset functionality, and how is it implemented?

Yes, MAX6715UTWGD3 includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Pulling MR low for ≥1µs forces an immediate reset assertion, which remains active for the full 210ms timeout period after MR returns high. No external components are needed - a simple momentary switch from MR to GND suffices.

What is the reset output configuration of MAX6715UTWGD3, and why does it matter for system design?

MAX6715UTWGD3 features a push-pull active-low RST output, meaning it actively drives both high (to 0.8×VCC1) and low (to ≤0.4V) without requiring an external pullup resistor. This reduces component count, eliminates pullup-related timing uncertainty, and ensures clean, fast edges critical for reliable µP reset signaling in high-speed server and telecom platforms.

Can MAX6715UTWGD3 operate reliably during deep supply brownouts?

Yes, MAX6715UTWGD3 guarantees valid reset output logic state as long as either VCC1 or VCC2 remains ≥0.8V - significantly lower than most supervisors. This ensures deterministic reset behavior during severe brownout conditions, such as DC-DC converter soft-start or input capacitor discharge, preventing spurious releases that could corrupt firmware execution.

How does the 210ms reset timeout period in MAX6715UTWGD3 align with typical processor boot requirements?

The 210ms minimum reset timeout in MAX6715UTWGD3 is designed to exceed typical BIOS/UEFI initialization windows on x86 server motherboards and FPGA configuration times in telecom line cards. It provides margin against worst-case temperature drift and ensures the host processor remains held in reset until all power rails are fully stabilized and clock sources locked.