Analog Devices Inc./Maxim Integrated MAX6379XR46

Overview

MAX6379XR46 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 4.63V 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 threshold and is used in portable equipment power sequencing and Li+-battery voltage supervision.

For engineers reviewing the MAX6379XR46 datasheet, MAX6379XR46 pinout, MAX6379XR46 application, or MAX6379XR46 equivalent, key selection criteria include reset threshold accuracy, ultra-low quiescent current, push-pull active-high output configuration, SC70-3 package footprint, and immunity to sub-10µs VCC transients at 4.63V overdrive.

Technical Context

The MAX6379XR46 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 4.63V detection without external components. Its internal architecture ensures stable threshold performance across -40°C to +85°C with ±2.5% accuracy and 40ppm/°C tempco.

This device operates as a single-function supervisor: it monitors VCC continuously and drives OUT high only when VCC drops below 4.63V. It ignores fast negative-going transients-up to ~140µs duration at 10mV overdrive-and maintains correct output state down to 1V VCC, enabling reliable brownout detection in low-voltage wake-up circuits.

Key Specifications

Pinout & Package

MAX6379XR46 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. The package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBZR and APX803S-46SA-7, the MAX6379XR46 uniquely delivers 4.63V precision detection in SC70-3 with 500nA current-enabling longest battery life and smallest PCB area in compact, long-duration applications.

Availability

MAX6379XR46 is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart meter backup power, and USB-C power delivery accessories requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for MAX6379XR46 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems-prioritizing nanoscale current, factory-trimmed accuracy, and transient-hardened reliability over feature richness.

FAQ

What is the exact reset threshold voltage of MAX6379XR46?

The MAX6379XR46 has a factory-trimmed nominal reset threshold of 4.63V, with guaranteed accuracy of ±2.5% over the full industrial temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external calibration. The MAX6379XR46 achieves this precision using an integrated bandgap reference and trimmed resistor network, ensuring consistent performance across units and batches.

Does MAX6379XR46 require external components to operate?

No, the MAX6379XR46 requires no external components. Its precision 4.63V threshold is set internally via laser-trimmed resistors, and its active-high push-pull output drives directly into a microcontroller reset pin without needing a pull-up resistor. This integration reduces BOM count, PCB area, and manufacturing complexity-making the MAX6379XR46 ideal for miniaturized, high-reliability applications.

What package type and dimensions does MAX6379XR46 use?

The MAX6379XR46 is supplied in a 3-pin SC70-3 package measuring 2.0mm × 2.1mm × 0.95mm. It uses standard SC70 pinout (GND on pin 1, OUT on pin 2, VCC on pin 3) and is RoHS-compliant and lead-free. This compact footprint supports high-density layouts in wearables, hearing aids, and other space-constrained portable electronics where the MAX6379XR46 is commonly deployed.

How does MAX6379XR46 behave during fast VCC transients?

The MAX6379XR46 is designed to ignore fast negative-going VCC transients: at 10mV overdrive (i.e., VCC = 4.62V), it tolerates glitches up to ~140µs without asserting output. This immunity is built into the comparator's internal timing and filtering, preventing false resets in electrically noisy environments. The MAX6379XR46 maintains correct output logic state down to 1V VCC, ensuring robust operation even during severe brownout events.

Is MAX6379XR46 compatible with 1.8V or 3.3V logic systems?

Yes-the MAX6379XR46's push-pull output is fully compatible with 1.8V, 3.3V, and 5V logic families. When asserted (VCC < 4.63V), OUT drives high to within 0.3V of VCC (e.g., ≥3.0V at VCC = 3.3V); when deasserted, it drives low to ≤0.4V. Its output stage is specified to source/sink current across the full 1.2V–5.5V VCC range, making the MAX6379XR46 interoperable with diverse host processors without level shifters.