Analog Devices Inc./Maxim Integrated MAX6378XR41-T

Overview

MAX6378XR41-T from Maxim Integrated is an ultra-low-power, active-low voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 4.100V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates down to 1V VCC - enabling reliable brownout detection in portable medical devices and low-power IoT sensors.

For engineers reviewing the MAX6378XR41-T datasheet, MAX6378XR41-T pinout, MAX6378XR41-T application, or MAX6378XR41-T equivalent, this device delivers verified reset accuracy, transient-immune operation, and SC70-3 footprint compatibility for space-constrained power management designs.

Technical Context

The MAX6378XR41-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.100V trip point. Its push-pull output asserts logic low when VCC falls below threshold and remains valid down to 1V supply - ensuring deterministic reset behavior during deep discharge.

It rejects fast VCC transients via built-in immunity circuitry, with maximum allowable negative glitch duration decreasing as threshold overdrive increases (e.g., ≤100µs at 100mV overdrive). Propagation delay is 9.5µs (typ) for falling edge, and hysteresis is fixed at 0.1mV.

Key Specifications

Pinout & Package

MAX6378XR41-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBZR and TPS3808G33DBVR, the MAX6378XR41-T uniquely satisfies 4.100V precision detection with ultra-low 500nA current in SC70-3 - making it irreplaceable for compact, long-life 4.1V brownout monitoring without layout or BOM changes.

Availability

MAX6378XR41-T is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, wearable fitness trackers, and smart utility meters requiring stable component supply and long-term obsolescence planning.

Supply support for MAX6378XR41-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 management, sensing, and connectivity in demanding industrial and portable applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in space- and energy-constrained systems - delivering factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of MAX6378XR41-T and how tightly is it specified?

The MAX6378XR41-T has a nominal reset threshold of 4.100V, with guaranteed tolerance of ±2.5% over the full -40°C to +85°C operating temperature range. This specification is factory-trimmed and does not require external calibration. The device also exhibits 40ppm/°C tempco, ensuring minimal drift across temperature. All threshold values for the MAX6378 series fall between 3.30V and 4.63V in ~100mV increments, and MAX6378XR41-T is the precise 4.100V variant.

Does MAX6378XR41-T require any external components to operate?

No, MAX6378XR41-T requires zero external components. It integrates a precision bandgap reference, comparator, and factory-trimmed resistor network to set its 4.100V threshold. The push-pull output eliminates the need for a pull-up resistor, and the 500nA supply current allows direct connection to battery or regulated rails without loading concerns. This integration reduces BOM cost, PCB area, and design validation effort compared to discrete supervisory solutions.

What is the minimum VCC voltage at which MAX6378XR41-T guarantees correct output logic state?

MAX6378XR41-T guarantees correct output logic state - i.e., asserted low when VCC < 4.100V and deasserted high when VCC ≥ 4.100V - down to 1.0V VCC. This capability is critical for applications where the monitored supply may decay deeply (e.g., end-of-life battery discharge), ensuring the device remains functional and predictable far beyond typical LDO dropout or MCU operating limits. The specification holds across the full -40°C to +85°C temperature range.

How does MAX6378XR41-T handle fast transients on the VCC line?

MAX6378XR41-T incorporates inherent transient immunity that suppresses false triggering from short-duration negative-going VCC glitches. Its architecture ignores transients up to ~100µs in width when the overdrive (VTH – VCC) is 100mV, with maximum allowable pulse width decreasing as overdrive increases. This behavior is characterized in the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet and enables robust operation in electrically noisy environments such as motor drives or switching power supplies without added RC filtering.

Which package and pinout does MAX6378XR41-T use, and is it compatible with other variants in the family?

MAX6378XR41-T uses the 3-pin SC70-3 package (pin 1 = GND, pin 2 = OUT, pin 3 = VCC), identical to all MAX6375–MAX6380 XR-series devices. This pinout is fully compatible across the entire family - meaning MAX6378XR41-T can be substituted with other XR-suffix parts (e.g., MAX6378XR33-T or MAX6379XR41-T) on the same footprint, provided the threshold and output logic (active-low push-pull) match system requirements. No PCB revision is needed for pin-compatible variants within the XR series.