Analog Devices Inc./Maxim Integrated MAX6377XR30+T

Overview

MAX6377XR30+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 3.00V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its role is to assert a logic-low output when supply voltage falls below threshold - used in Li+-battery-powered microcontroller reset supervision and DC/DC converter enable sequencing.

For engineers reviewing the MAX6377XR30+T datasheet, MAX6377XR30+T pinout, MAX6377XR30+T application, or MAX6377XR30+T equivalent, key selection criteria include its 3.00V trip point, SC70-3 open-drain output architecture, ±2.5% threshold accuracy over -40°C to +85°C, immunity to sub-200µs VCC transients, and compatibility with 1.2V–5.5V logic pull-up domains.

Technical Context

The MAX6377XR30+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.00V detection threshold. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted, enabling flexible interfacing across logic voltage domains (up to 5.5V).

It ignores fast negative-going VCC transients - maximum allowable glitch duration is ≤140µs at 100mV overdrive - and maintains correct output state down to 1V supply, supporting brown-out detection during deep discharge or startup in energy-constrained systems.

Key Specifications

Pinout & Package

MAX6377XR30+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable PCB layouts. The package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB30DBZR and APX803S-30SA-7, the MAX6377XR30+T offers the smallest footprint (SC70-3), lowest temperature drift (40ppm/°C), and best transient rejection profile - making it optimal for ultra-compact, battery-critical designs where layout density and glitch immunity are prioritized.

Availability

MAX6377XR30+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart home motion detectors, and asset tracking modules requiring stable component supply and long-term manufacturability.

Supply support for MAX6377XR30+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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in battery-constrained systems - delivering precision thresholds, nanoscale quiescent current, and robust transient immunity in minimal SC70/SOT23 footprints.

FAQ

What is the exact reset threshold voltage of the MAX6377XR30+T?

The MAX6377XR30+T has a factory-trimmed nominal reset threshold of 3.00V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 3.00V, and the device maintains correct output logic state down to VCC = 1V - critical for detecting early-stage battery depletion in MAX6377XR30+T-based systems.

Does the MAX6377XR30+T require an external pull-up resistor on its OUT pin?

Yes, the MAX6377XR30+T features an open-drain active-low output, so an external pull-up resistor is mandatory to establish a defined high state when the output is not asserted. The pull-up can connect to any voltage rail up to 5.5V, allowing interoperability with 1.8V, 2.5V, 3.3V, or 5V logic domains - a key design advantage of the MAX6377XR30+T over push-pull alternatives.

What is the supply current consumption of the MAX6377XR30+T across temperature?

The MAX6377XR30+T draws only 500nA typical supply current at +25°C, rising to ≤1.0µA over the full -40°C to +85°C range. This ultra-low ICC enables multi-year operation from small primary batteries - a defining characteristic confirmed in the MAX6377XR30+T electrical characteristics table and validated in typical operating curves.

Can the MAX6377XR30+T be used with a 1.8V microcontroller I/O pin?

Yes, the MAX6377XR30+T's open-drain output is fully compatible with 1.8V logic. Simply connect the external pull-up resistor to the 1.8V rail - the MAX6377XR30+T's OUT pin will sink current to generate a valid logic-low signal, and the pull-up establishes a 1.8V logic-high. No level-shifting circuitry is needed, simplifying integration in mixed-voltage systems using MAX6377XR30+T.

How does the MAX6377XR30+T handle short voltage glitches on the VCC line?

The MAX6377XR30+T incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than ~140µs when the overdrive (VTH − VCC) is 100mV. This behavior is documented in the "Maximum Transient Duration vs. Threshold Overdrive" graph and prevents spurious resets caused by switching noise or load transients - a core reliability feature of the MAX6377XR30+T.