Analog Devices Inc./Maxim Integrated MAX6376UR26+T

Overview

MAX6376UR26+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 2.63V threshold (±2.5% over temperature), 500nA supply current at +25°C, 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 MAX6376UR26+T datasheet, MAX6376UR26+T pinout, MAX6376UR26+T application, or MAX6376UR26+T equivalent, key selection criteria include its active-high push-pull output configuration, 2.63V trip point, SC70/SOT23-3 package compatibility, transient immunity, and sub-1µA quiescent current across -40°C to +85°C.

Technical Context

The MAX6376UR26+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.63V detection without external components. Its internal architecture ensures stable threshold accuracy and eliminates manual calibration.

It employs propagation delay filtering to reject fast VCC transients up to ~20µs (at 100mV overdrive) and maintains correct output state down to 1V supply - enabling reliable reset assertion during brownout conditions in low-voltage embedded systems.

Key Specifications

Pinout & Package

MAX6376UR26+T is housed in a 3-pin SOT23-3 package (lead-free, RoHS-compliant), with pin 1 = GND, pin 2 = OUT, pin 3 = VCC. The compact 2.92mm × 1.3mm footprint supports high-density portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB26DBZR and TPS3801K26DBVR, the MAX6376UR26+T uniquely combines 0.5µA ICC, active-high push-pull drive, and guaranteed 1V operation - making it optimal for space-constrained, ultra-low-power battery systems requiring direct µP reset interfacing without external components.

Availability

MAX6376UR26+T is available at Aetrix Electronics and suitable for portable electronics, battery management systems, and industrial sensor nodes requiring stable component supply with lead-free compliance and tape-and-reel packaging.

Supply support for MAX6376UR26+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 power, sensing, and connectivity applications, with emphasis on high reliability and low power.

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

FAQ

What is the exact reset threshold voltage of the MAX6376UR26+T?

The MAX6376UR26+T has a nominal reset threshold of 2.63V, with a guaranteed range of 2.564V to 2.696V over the full operating temperature range of –40°C to +85°C. This value is factory-laser-trimmed and specified in Table 1 of the datasheet under suffix "R26". The MAX6376UR26+T does not require external adjustment to achieve this accuracy.

Does the MAX6376UR26+T require external components to operate?

No, the MAX6376UR26+T requires no external components. It integrates a precision bandgap reference, comparator, and trimmed resistor network internally. Only VCC, GND, and the OUT signal connection are needed - eliminating external resistors, capacitors, or pull-ups required by discrete solutions or less integrated supervisors.

What is the output configuration of the MAX6376UR26+T, and how does it interface to a microcontroller?

The MAX6376UR26+T features an active-high push-pull output. When VCC falls below 2.63V, OUT drives logic-high (typically >0.8×VCC); when VCC is above threshold, OUT drives logic-low. This allows direct connection to standard µP /RESET pins without external pull-up resistors - unlike open-drain alternatives that require external biasing.

Can the MAX6376UR26+T operate reliably at very low supply voltages?

Yes, the MAX6376UR26+T is guaranteed to maintain correct output logic state down to 1V VCC, and functions across 1.2V to 5.5V. This enables robust reset assertion during deep brownout conditions common in lithium coin-cell or partially discharged Li+ battery applications - a key differentiator from many competing supervisors.

How does the MAX6376UR26+T handle power supply transients?

The MAX6376UR26+T incorporates internal filtering to reject fast negative-going VCC transients. According to the Typical Operating Characteristics, it ignores glitches ≤20µs wide when the overdrive (VTH – VCC) is 100mV. This prevents false resets caused by switching noise or load dumps, ensuring stable operation in electrically noisy environments.