Analog Devices Inc./Maxim Integrated MAX6380XR41+T

Overview

MAX6380XR41+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 4.100V threshold (±2.5% over temperature), 500nA supply current, and operates down to 1V VCC. It asserts OUT low when VCC falls below threshold and is used in portable equipment power sequencing and Li+-battery undervoltage lockout.

For engineers reviewing the MAX6380XR41+T datasheet, MAX6380XR41+T pinout, MAX6380XR41+T application, or MAX6380XR41+T equivalent, this page delivers verified electrical parameters, SC70-3 package details, transient-immune reset behavior, and direct alternatives for supply-monitoring designs requiring sub-1µA quiescent current and ±2.5% threshold accuracy.

Technical Context

The MAX6380XR41+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.100V detection threshold. Its open-drain output sinks current when asserted and requires an external pull-up to any voltage ≤5.5V. The device ignores fast negative-going VCC transients up to duration limits defined by threshold overdrive.

It belongs to the MAX6375–MAX6380 family of single-function voltage detectors with no enable input or watchdog capability. All variants guarantee correct logic state down to 1V VCC and are specified for -40°C to +85°C operation. The MAX6380 series specifically targets higher-voltage rails (3.30V–4.63V) with 100mV increment options.

Key Specifications

Pinout & Package

MAX6380XR41+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable PCBs. Pin 1 = GND, Pin 2 = OUT (open-drain), Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBVR and TPS3808G33DBVR, the MAX6380XR41+T offers higher threshold (4.100V), lower supply current (500nA), and smaller SC70-3 footprint - making it optimal for 4V-range battery monitoring where minimal self-load and board area are critical.

Availability

MAX6380XR41+T is available at Aetrix Electronics and suitable for portable medical devices, battery management systems, and industrial IoT nodes requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for MAX6380XR41+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, low-power solutions.

The MAX6375–MAX6380 family was developed specifically for ultra-low-power supply monitoring in portable and battery-critical systems, delivering factory-trimmed thresholds and nanoscale quiescent current without external components.

FAQ

What is the exact reset threshold voltage of MAX6380XR41+T, and how stable is it over temperature?

The MAX6380XR41+T has a nominal reset threshold of 4.100V, with ±2.5% accuracy guaranteed over the full -40°C to +85°C operating range. Its 40ppm/°C temperature coefficient ensures minimal drift, and hysteresis of 100mV prevents oscillation near the trip point. This stability eliminates need for system-level recalibration in field-deployed MAX6380XR41+T applications.

Does MAX6380XR41+T require an external pull-up resistor, and what is the maximum allowable pull-up voltage?

Yes, MAX6380XR41+T requires an external pull-up resistor because its OUT pin is open-drain. The pull-up voltage may be as high as 5.5V - independent of the VCC supply - enabling level-shifting to higher-voltage logic domains. Typical values range from 10kΩ to 100kΩ, selected to ensure VOL ≤0.4V at 100µA sink current while minimizing static power draw.

Can MAX6380XR41+T operate reliably when VCC drops below 2.0V?

Yes, MAX6380XR41+T is fully specified to maintain correct output logic state down to VCC = 1.2V, and functional operation is guaranteed to 1.0V. Its internal bandgap reference and comparator remain active and accurate well into brownout conditions, ensuring robust reset assertion even during deep discharge of lithium or alkaline batteries powering the MAX6380XR41+T.

What is the propagation delay of MAX6380XR41+T, and how does it vary with supply voltage?

The typical propagation delay of MAX6380XR41+T is 9.5µs for the falling edge (VCC drop below threshold), measured under standard conditions (VOD = 200mV). Delay remains stable across VCC from 1.2V to 5.5V due to internal regulation - unlike comparator-based detectors whose speed degrades at low supply. This consistency ensures predictable timing in MAX6380XR41+T reset sequences regardless of rail voltage.

Is MAX6380XR41+T available in both leaded and lead-free packaging, and how is lead-free indicated in the part number?

Yes, MAX6380XR41+T is available in lead-free packaging. The "+T" suffix explicitly denotes lead-free (RoHS-compliant) tape-and-reel packaging, whereas "-T" indicates standard leaded packaging. Both versions share identical electrical specifications and SC70-3 mechanical dimensions, allowing drop-in replacement in new designs targeting environmental compliance without layout changes for the MAX6380XR41+T.