Analog Devices Inc./Maxim Integrated MAX6376XR31

Overview

MAX6376XR31 from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 3.08V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC - used to assert a logic-high reset signal during brownout conditions in microcontroller-based wearables and IoT sensors.

For engineers reviewing the MAX6376XR31 datasheet, MAX6376XR31 pinout, MAX6376XR31 application, or MAX6376XR31 equivalent, key selection criteria include its active-high output configuration, SC70-3 package footprint, 3.08V trip point with hysteresis, and immunity to sub-20µs VCC transients - critical for reliable low-voltage system supervision.

Technical Context

The MAX6376XR31 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 3.08V detection without external components. Its internal architecture ensures stable threshold accuracy across -40°C to +85°C and eliminates calibration overhead in space-constrained designs.

It operates as a single-function supervisor: asserting OUT high when VCC falls below 3.08V, holding that state until VCC rises above the hysteresis level (≈3.18V), and maintaining valid logic output even at VCC = 1V - enabling robust reset generation in deep-battery-discharge scenarios.

Key Specifications

Pinout & Package

MAX6376XR31 is housed in a 3-pin SC70-3 package (1.25mm × 2.0mm × 0.95mm), compatible with automated SMT assembly and offering superior thermal performance vs. SOT23-3 in dense layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TLV803EB30DBZR and TPS3801K30DBVR, MAX6376XR31 offers the optimal balance of 3.08V precision threshold, 500nA ultra-low current, and SC70-3 footprint - making it preferred for compact, long-life portable electronics where exact brownout point and minimal board area are critical.

Availability

MAX6376XR31 is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, and portable medical devices requiring stable component supply with consistent lead times and volume pricing.

Supply support for MAX6376XR31 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in space- and energy-constrained portable systems - delivering factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of MAX6376XR31 and how is it specified over temperature?

The MAX6376XR31 has a nominal reset threshold of 3.08V, with ±2.5% accuracy guaranteed over the full operating temperature range of -40°C to +85°C. This specification is achieved via factory laser trimming of internal resistors and validated by design - not production tested at extremes but ensured through process characterization and correlation to room-temperature test data.

Does MAX6376XR31 require any external components to function?

No, MAX6376XR31 requires zero external components. Its precision bandgap reference, comparator, and laser-trimmed resistor network are fully integrated, eliminating the need for external voltage dividers, capacitors, or pull-up resistors - reducing BOM cost and PCB area while improving reliability.

What is the output configuration of MAX6376XR31 and how does it interface with a microcontroller?

MAX6376XR31 features an active-high push-pull output. When VCC drops below 3.08V, OUT asserts high (logic 1); when VCC recovers above the hysteresis threshold (~3.18V), OUT returns low. This allows direct connection to standard CMOS RESET inputs without external pull-up, simplifying interface design and reducing standby leakage.

Can MAX6376XR31 operate reliably at very low supply voltages?

Yes, MAX6376XR31 is guaranteed to maintain correct output logic state down to VCC = 1V - enabling valid reset assertion even during deep battery discharge. This capability extends usable battery life in coin-cell and primary-lithium applications where voltage decay below 2V is common.

What package options are available for MAX6376XR31 and what are their key mechanical differences?

MAX6376XR31 is offered exclusively in the SC70-3 package (1.25mm × 2.0mm × 0.95mm). Unlike the pin-compatible SOT23-3 variant (MAX6376UR31), the SC70-3 provides a smaller footprint and lower thermal resistance - advantageous for high-density portable PCBs where space and thermal performance are constrained.