Analog Devices Inc./Maxim Integrated MAX6376UR31+T

Overview

MAX6376UR31+T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 3.08V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC. It asserts a logic-high output when VCC falls below threshold and is used in portable equipment power sequencing and microcontroller reset supervision.

For engineers reviewing the MAX6376UR31+T datasheet, MAX6376UR31+T pinout, MAX6376UR31+T application, or MAX6376UR31+T equivalent, this page delivers verified technical context, pin-level design meaning, real-world use cases, and validated alternative options - all grounded in Maxim's official specifications for the SOT23-3 packaged device.

Technical Context

The MAX6376UR31+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 3.08V detection with ±2.5% accuracy across –40°C to +85°C. Its internal architecture eliminates external components and rejects fast VCC transients up to 200µs (at 100mV overdrive).

It operates as a single-function supervisor: asserting active-high push-pull output (OUT) when VCC drops below 3.08V, with propagation delay under 6.3µs (typical) and output drive capability of 500µA source / 1.2mA sink at VCC ≥ 2.1V.

Key Specifications

Pinout & Package

MAX6376UR31+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6376UR31+T, TPS3123QDBVRQ1 adds automotive qualification at the cost of 3.6× higher supply current and open-drain limitations, while APX803S-30SA-7 offers near-equivalent form/fit/function but with reduced threshold accuracy and higher ICC - making MAX6376UR31+T optimal for long-life portable designs demanding precise 3.08V detection and sub-µA operation.

Availability

MAX6376UR31+T is available at Aetrix Electronics and suitable for portable medical sensors, smart home security devices, and industrial telemetry modules requiring stable component supply and long-term manufacturability.

Supply support for MAX6376UR31+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, mixed-signal, and power management ICs for high-reliability industrial, medical, and communications applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in space-constrained, battery-dependent systems - delivering factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of MAX6376UR31+T?

The MAX6376UR31+T has a factory-trimmed nominal reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full –40°C to +85°C temperature range. This value is laser-trimmed during production and does not require external calibration. The "R31" suffix in MAX6376UR31+T explicitly denotes the 3.08V variant per Maxim's Selector Guide.

Does MAX6376UR31+T require external components to operate?

No, MAX6376UR31+T requires no external components. It integrates a precision bandgap reference, comparator, and trimmed resistor network to set its 3.08V threshold. Unlike adjustable supervisors, it needs only VCC, GND, and the OUT signal connection - reducing PCB area, BOM count, and qualification effort.

What is the output configuration of MAX6376UR31+T and how does it interface with a microcontroller?

MAX6376UR31+T features an active-high push-pull output. When VCC drops below 3.08V, OUT drives logic high; otherwise, it drives logic low. This allows direct connection to standard µP reset inputs (e.g., nRESET pins that trigger on high) without pull-up resistors - simplifying layout and ensuring robust noise immunity.

Can MAX6376UR31+T operate reliably during brief power supply transients?

Yes, MAX6376UR31+T is designed to ignore fast negative-going VCC transients. Per Maxim's Typical Operating Characteristics, it suppresses output pulses for transients ≤200µs when the overdrive (VTH – VCC) is 100mV. This immunity prevents spurious resets during switching noise or load dumps in DC/DC-powered systems.

What package and lead finish does MAX6376UR31+T use, and is it RoHS compliant?

MAX6376UR31+T uses the 3-pin SOT23-3 package (JEDEC MO-178AA) with matte-tin–plated terminals. The "+T" suffix confirms lead-free, RoHS-compliant construction, qualified for Pb-free reflow soldering per JEDEC J-STD-020. It is footprint-compatible with SC70-3 but rated for higher power dissipation (320mW vs. 174mW).