Analog Devices Inc./Maxim Integrated MAX6380XR46-T

Overview

MAX6380XR46-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for 4.63V threshold monitoring in battery-backed and regulated power systems. It features ±2.5% threshold accuracy over temperature, 500nA supply current, and operates down to 1V VCC while ignoring fast transients - ideal for precision brownout detection in portable medical sensors.

For engineers reviewing the MAX6380XR46-T datasheet, MAX6380XR46-T pinout, MAX6380XR46-T application, or MAX6380XR46-T equivalent, this device serves as a factory-trimmed, SC70-3 packaged reset supervisor with guaranteed logic state integrity across -40°C to +85°C, low-voltage operation, and transient-immune monitoring of 4.63V rails.

Technical Context

The MAX6380XR46-T implements a precision bandgap reference and comparator with internally trimmed resistors to deliver a fixed 4.63V detection threshold. Its open-drain output asserts low when VCC falls below VTH and remains valid down to 1V supply, enabling reliable reset generation even during deep brownout conditions.

It provides 9.5µs propagation delay (falling edge), 100mV hysteresis, and immunity to negative-going VCC transients up to ~200µs at 30mV overdrive. No external components are required, and its design eliminates trimming or calibration in production.

Key Specifications

Pinout & Package

MAX6380XR46-T is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), compatible with high-density PCB layouts and reflow assembly. The package is lead-free (RoHS-compliant) and supplied in tape-and-reel format.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB46DBZR and APX803S-46SA-7, the MAX6380XR46-T offers tighter threshold accuracy over temperature (±2.5% vs ±3.0%), identical open-drain flexibility, and proven transient immunity - making it preferred for safety-critical or long-life battery applications where reset timing fidelity is non-negotiable.

Availability

MAX6380XR46-T is available at Aetrix Electronics and suitable for portable medical devices, industrial I/O modules, wireless sensor nodes, and battery-backed memory systems requiring stable component supply and long-term lifecycle support.

Supply support for MAX6380XR46-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 reliability and integration.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed thresholds, sub-µA operation, and robust transient rejection without external components.

FAQ

What is the exact reset threshold voltage of the MAX6380XR46-T?

The MAX6380XR46-T has a nominal reset threshold of 4.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 4.63V, and the datasheet specifies min/max bounds of 4.514V and 4.746V across temperature - critical for validating compliance with 5V system brownout margins.

Does the MAX6380XR46-T require external components to operate?

No, the MAX6380XR46-T requires no external components. Its precision bandgap reference, comparator, and factory-trimmed resistor network are fully integrated. Only an external pull-up resistor on the open-drain OUT pin is needed for proper logic-level translation - no capacitors, resistors, or trimming circuits are necessary for basic reset functionality.

What package type and dimensions does the MAX6380XR46-T use?

The MAX6380XR46-T uses the SC70-3 package: 2.0mm × 1.25mm footprint, 0.95mm height, with gull-wing leads. Pin 1 is GND, pin 2 is OUT, and pin 3 is VCC. This RoHS-compliant, lead-free package supports high-density placement and standard reflow soldering profiles.

Can the MAX6380XR46-T operate reliably below 2.0V VCC?

Yes - the MAX6380XR46-T guarantees correct output logic state down to 1.0V VCC. Its internal circuitry remains functional and asserts OUT low when VCC falls below 4.63V, even at 1.2V supply. This enables robust reset generation during deep brownout or battery depletion scenarios where other supervisors fail.

How does the MAX6380XR46-T handle power supply transients?

The MAX6380XR46-T rejects fast negative-going VCC transients up to ~200µs wide when the overdrive (VTH – VCC) is 30mV, per the Typical Operating Characteristics graph. This built-in immunity prevents false resets caused by switching noise, load dumps, or ESD-induced supply glitches - eliminating need for external RC filtering.