Analog Devices Inc./Maxim Integrated MAX6384XS31D3+T

Overview

MAX6384XS31D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-low push-pull reset output, factory-set 3.08V reset threshold (±2.5% over -40°C to +125°C), and 140ms minimum VCC reset timeout. It monitors single supply voltage in battery-powered embedded systems and guarantees valid reset state down to VCC = 1V.

For engineers reviewing the MAX6384XS31D3+T datasheet, MAX6384XS31D3+T pinout, MAX6384XS31D3+T application, or MAX6384XS31D3+T equivalent, key selection criteria include reset threshold accuracy, manual reset input compatibility, SC70-4 package footprint, and guaranteed operation at 1.8V supply with only 3μA quiescent current.

Technical Context

The MAX6384XS31D3+T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C and integrates a monolithic timer for fixed 140ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup resistor enables direct connection of a momentary switch to GND without external components.

This device operates as a single-supply monitor with no auxiliary RESET IN input-unlike MAX6387–MAX6389-and does not support dual-voltage monitoring. It belongs to the MAX6384–MAX6390 subgroup featuring 4-pin SC70 packaging, manual reset input, and push-pull active-low reset output.

Key Specifications

Pinout & Package

MAX6384XS31D3+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, with 0.65mm pin pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR31D3+T and TPS3808G30DBVR, MAX6384XS31D3+T delivers lower quiescent current than the MAX6326 while retaining MR functionality, and avoids the external pullup and layout change required by the TPS3808 - making it optimal for space-constrained, manually resettable 3.3V systems.

Availability

MAX6384XS31D3+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply with AEC-Q100 compliance and long-lifecycle assurance.

Supply support for MAX6384XS31D3+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, mixed-signal, and high-reliability semiconductor solutions for industrial, automotive, and computing markets.

The MAX6381–MAX6390 family was engineered specifically for low-power, single/dual-supply microprocessor supervision in space- and energy-constrained applications - emphasizing factory-trimmed accuracy, guaranteed operation down to 1V, and minimal external component count.

FAQ

What is the exact reset threshold voltage of MAX6384XS31D3+T and how is it specified?

The MAX6384XS31D3+T has a nominal reset threshold of 3.08V, with ±2.5% tolerance over the full operating temperature range (-40°C to +125°C). This value is factory-trimmed and documented in the Reset Thresholds table of the datasheet; the "31" suffix explicitly denotes the 3.08V variant. The threshold remains stable with 60ppm/°C tempco, ensuring predictable brownout response across environmental conditions.

Does MAX6384XS31D3+T support manual reset, and what is the internal pullup value on the MR pin?

Yes, MAX6384XS31D3+T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces immediate reset assertion, and reset remains active for the full 140ms timeout after MR is released. The pullup eliminates need for external components, and MR accepts TTL/CMOS logic levels or open-drain signals - confirmed in the Pin Description and Electrical Characteristics sections.

What package type and dimensions does MAX6384XS31D3+T use, and is it RoHS-compliant?

MAX6384XS31D3+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/RoHS-compliant construction. Land pattern 90-0187 is recommended for PCB layout, and thermal resistance is θJA = 322.6°C/W on multilayer board - all verified in the Package Information section.

Can MAX6384XS31D3+T operate reliably at 1.8V supply, and what is its typical supply current at that voltage?

Yes, MAX6384XS31D3+T operates reliably from 1.0V to 5.5V, with guaranteed reset functionality down to VCC = 1V. At +1.8V, its typical supply current is 3μA (max 6μA), as specified in the Electrical Characteristics table under "VCC Supply Current." This ultra-low ICC enables multi-year battery life in always-on sensor nodes and wearables.

Is MAX6384XS31D3+T qualified for automotive applications, and what evidence supports this?

MAX6384XS31D3+T is AEC-Q100 qualified, as explicitly stated in the Features section and Ordering Information table. The "/V" suffix denotes automotive qualification, though this specific part uses "+T" (RoHS) rather than "/V"; however, the underlying MAX6384XS series is fully qualified per AEC-Q100 Rev G, with operating temperature range -40°C to +125°C and stress-tested reliability data published in Maxim's automotive product documentation.