Analog Devices Inc./Maxim Integrated MAX6379XR37+T

Overview

MAX6379XR37+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 3.70V 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 the threshold and is used in portable equipment power sequencing and microcontroller reset supervision.

For engineers reviewing the MAX6379XR37+T datasheet, MAX6379XR37+T pinout, MAX6379XR37+T application, or MAX6379XR37+T equivalent, key selection criteria include its 3.70V trip point, SC70-3 package, active-high push-pull output, transient immunity, and compatibility with low-voltage brownout detection in space-constrained embedded designs.

Technical Context

The MAX6379XR37+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 3.70V detection without external components. Its internal architecture ensures stable threshold accuracy across -40°C to +85°C and rejects fast VCC transients up to 100µs at 30mV overdrive.

This device operates as a single-function supervisor: it monitors VCC continuously and drives OUT high only when VCC drops below 3.70V. Unlike open-drain variants, its push-pull output eliminates need for external pull-up resistors and supports direct interfacing with CMOS inputs requiring active-high reset signals.

Key Specifications

Pinout & Package

MAX6379XR37+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for ultra-compact PCB layouts in wearables and IoT sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB37DBVR and TPS3808G37DBVR, the MAX6379XR37+T delivers lowest ICC (500nA), smallest SC70-3 footprint, and native active-high push-pull output - making it optimal for space- and energy-constrained designs where reset polarity and size are critical.

Availability

MAX6379XR37+T is available at Aetrix Electronics and suitable for portable medical devices, wearable fitness trackers, and industrial IoT sensors requiring stable component supply with long-term lifecycle support.

Supply support for MAX6379XR37+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in battery-critical applications, emphasizing nanoscale ICC, factory-trimmed accuracy, and minimal board area - targeting portable and energy-harvesting systems.

FAQ

What is the exact reset threshold voltage of MAX6379XR37+T?

The MAX6379XR37+T has a factory-trimmed nominal reset threshold of 3.70V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external calibration. The 'R37' suffix explicitly denotes the 3.70V variant within the MAX6379 series, and the MAX6379XR37+T maintains this specification under all valid VCC conditions from 1.2V to 5.5V.

Does MAX6379XR37+T require external components to operate?

No, the MAX6379XR37+T requires no external components. It integrates a precision bandgap reference, comparator, and laser-trimmed resistor network to set the 3.70V threshold internally. Unlike discrete resistor-divider supervisors, the MAX6379XR37+T eliminates calibration parts, reduces BOM count, and avoids drift-related inaccuracies - delivering consistent performance across temperature and time without user adjustment.

What is the output configuration of MAX6379XR37+T and how does it interface with MCUs?

The MAX6379XR37+T features an active-high push-pull output, meaning it drives OUT high (≥0.8×VCC) when VCC falls below 3.70V and actively pulls OUT low when VCC is above threshold. This eliminates the need for external pull-up resistors and allows direct connection to standard CMOS reset inputs requiring active-high assertion - such as those found on Nordic nRF52, Silicon Labs EFM32, and ST STM32L0/L4 microcontrollers.

How does MAX6379XR37+T handle power supply transients?

The MAX6379XR37+T incorporates built-in transient immunity that suppresses false triggering from short-duration VCC dips. According to its Typical Operating Characteristics, it ignores negative-going transients ≤100µs wide when the overdrive (VTH – VCC) is ≥30mV. This ensures robust reset behavior in electrically noisy environments - for example, during motor startup or RF transmission bursts - without requiring additional filtering capacitors or debounce circuitry.

What package and footprint does MAX6379XR37+T use, and is it RoHS-compliant?

The MAX6379XR37+T uses the SC70-3 package (2.0mm × 2.1mm × 0.95mm), with pin 1 = GND, pin 2 = OUT, pin 3 = VCC. It is supplied in lead-free, RoHS-compliant packaging - indicated by the '+T' suffix per Maxim's ordering convention. The SC70-3 footprint is smaller than SOT-23-3 and compatible with standard reflow profiles, supporting high-density assembly in miniaturized PCBs.