Analog Devices Inc./Maxim Integrated MAX6384XS42D2+T

Overview

MAX6384XS42D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-low push-pull reset output, factory-set 4.20V reset threshold (±2.5% over –40°C to +125°C), and 20ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V while consuming 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.

For engineers reviewing the MAX6384XS42D2+T datasheet, MAX6384XS42D2+T pinout, MAX6384XS42D2+T application, or MAX6384XS42D2+T equivalent, key selection criteria include its 4-pin SC70 package, debounced manual reset input (MR) with internal 63kΩ pullup, ±2.5% threshold accuracy over temperature, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Technical Context

The MAX6384XS42D2+T implements a precision voltage comparator with internal 4.20V reference and an on-chip timer that asserts RESET for ≥20ms after VCC rises above threshold. Its MR input triggers reset independently and features glitch rejection (100ns) and 1µs minimum pulse width support.

Reset assertion is guaranteed for VCC ≥ 1V; output logic state remains valid during brownout. The device uses BiCMOS process and supports operation from –40°C to +125°C with AEC-Q100 qualification available in /V variants - though MAX6384XS42D2+T itself is RoHS-compliant standard-grade.

Key Specifications

Pinout & Package

MAX6384XS42D2+T is housed in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, with exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6384XS42D2+T, MAX6326XR42D2+T removes MR functionality to reduce cost and die size, while TPS3808G33DBVR offers superior threshold accuracy and lower current but sacrifices MR integration and pin compatibility - making MAX6384XS42D2+T optimal for space-constrained designs requiring both precise voltage monitoring and user-reset capability in a single 4-pin SC70 package.

Availability

MAX6384XS42D2+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical microprocessor supervision, and dual-voltage systems requiring stable component supply with lead-free compliance and industrial temperature support.

Supply support for MAX6384XS42D2+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 power management ICs for demanding industrial, computing, and communications applications.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-sensitive and thermally harsh environments - targeting portable instrumentation, controllers, and intelligent power systems.

FAQ

What is the exact reset threshold voltage of MAX6384XS42D2+T and how stable is it over temperature?

The MAX6384XS42D2+T has a factory-set nominal reset threshold of 4.20V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser-trimmed on-chip references and BiCMOS process design - ensuring consistent reset activation across automotive and industrial thermal profiles without external calibration.

Does MAX6384XS42D2+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6384XS42D2+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 (for VTH < 4V) or below 0.8V (for VTH > 4V). Minimum pulse width is 1µs, and it rejects glitches <100ns - enabling direct connection to a momentary switch without external filtering.

What package type and dimensions does MAX6384XS42D2+T use, and is it RoHS-compliant?

MAX6384XS42D2+T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. Land pattern 90-0187 is recommended for PCB layout, and thermal resistance θJA is 322.6°C/W on multilayer board.

Can MAX6384XS42D2+T operate reliably at very low supply voltages, and what is its minimum functional VCC?

Yes, MAX6384XS42D2+T guarantees correct reset output logic state down to VCC = 1.0V - critical for brownout detection during power decay. Its supply current remains only 3μA at +1.8V, and absolute maximum VCC is +5.5V. Operation below 1.0V is not specified; for VCC = 0V reset validity, external pulldown resistors are required (not applicable to open-drain variants).

How does MAX6384XS42D2+T handle short VCC transients, and what is its immunity specification?

MAX6384XS42D2+T provides built-in immunity to negative-going VCC transients: it will not falsely trigger reset for glitches ≤35µs wide when the overdrive (VTH – VCC) is 100mV. This is validated per Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive." Adding a 0.1µF ceramic capacitor close to VCC further enhances robustness in noisy environments.