Analog Devices Inc./Maxim Integrated MAX6384XS46D2+T

Overview

MAX6384XS46D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 4.63V reset threshold, 20ms minimum VCC reset timeout, and active-low push-pull reset output. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. Used in portable battery-powered equipment for reliable power-up sequencing and brownout protection.

For engineers reviewing the MAX6384XS46D2+T datasheet, MAX6384XS46D2+T pinout, MAX6384XS46D2+T application, or MAX6384XS46D2+T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), manual reset input with internal 63kΩ pullup, 4-pin SC70 package footprint, and immunity to negative-going VCC transients.

Technical Context

The MAX6384XS46D2+T implements a precision voltage comparator with ±2.5% threshold accuracy across −40°C to +125°C and integrates a monostable timer for fixed 20ms reset assertion after VCC recovery. Its push-pull active-low RESET output drives directly into μP reset inputs without external pullup.

It features a debounced manual reset input (MR) with 1μs minimum pulse width support and 100ns glitch rejection, and guarantees correct logic state for VCC ≥ 1V - enabling robust operation during deep brownout conditions.

Key Specifications

Pinout & Package

MAX6384XS46D2+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset applications.

Compared with MAX809SUR+T and TPS3808G33DBVR, the MAX6384XS46D2+T uniquely delivers 4.63V precision threshold, 20ms fast timeout, and integrated MR in a 4-pin SC70 - making it optimal for compact +5V systems requiring user-initiated reset and rapid recovery.

Availability

MAX6384XS46D2+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial controllers, and dual-voltage embedded systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability (AEC-Q100 qualified variants available).

Supply support for MAX6384XS46D2+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 demanding industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.

The MAX6381–MAX6390 family was engineered specifically for microprocessor supervisory functions in space- and power-constrained systems, delivering factory-trimmed thresholds, sub-μA quiescent current, and guaranteed operation down to 1V VCC.

FAQ

What is the exact reset threshold voltage of MAX6384XS46D2+T and how stable is it over temperature?

The MAX6384XS46D2+T has a nominal reset threshold of 4.63V, with ±2.5% accuracy guaranteed over the full operating range of −40°C to +125°C. This corresponds to a min/max threshold window of 4.51V to 4.74V at +25°C and 4.51V to 4.74V across temperature - verified by production testing per the datasheet's Electrical Characteristics table.

Does MAX6384XS46D2+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6384XS46D2+T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, drive MR below 0.3×VCC (e.g., <1.38V at VCC = 4.6V). The pin accepts TTL/CMOS logic levels and supports minimum pulse widths of 1μs with 100ns glitch rejection - enabling direct connection to momentary switches or digital outputs without external components.

What package type and dimensions does MAX6384XS46D2+T use, and is it RoHS-compliant?

MAX6384XS46D2+T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. Land pattern 90-0187 is recommended for PCB layout, and thermal resistance is θJA = 322.6°C/W on a multilayer board.

Can MAX6384XS46D2+T operate reliably when VCC drops below 1.8V, and down to what voltage does reset remain valid?

Yes, MAX6384XS46D2+T operates reliably down to VCC = 1.0V, and its RESET output state is guaranteed valid down to VCC = 1.0V - meaning the active-low signal remains correctly asserted or deasserted even during severe brownout. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where functionality is specified from 1.0V to 5.5V.

Is MAX6384XS46D2+T pin-compatible with older Maxim reset ICs like MAX809, and what design benefits does that provide?

Yes, MAX6384XS46D2+T is pin-compatible with MAX809/MAX810 series in the same 4-pin SC70 footprint. This enables direct replacement in legacy designs without PCB rework, while upgrading to lower supply current (3μA vs. ~10μA), tighter threshold accuracy (±2.5% vs. ±3.5%), and integrated MR functionality - reducing BOM count and improving system robustness.