Analog Devices Inc./Maxim Integrated MAX6384XS29D4+T

Overview

MAX6384XS29D4+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 2.93V reset threshold, 1120ms VCC reset timeout, and 140ms manual reset timeout. It features push-pull active-low reset output, debounced manual reset input (MR), and operates from 1.0V to 5.5V supply while consuming only 3μA at 1.8V. It is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6384XS29D4+T datasheet, MAX6384XS29D4+T pinout, MAX6384XS29D4+T application, or MAX6384XS29D4+T equivalent, key selection considerations include its 2.93V ±2.5% threshold accuracy over –40°C to +125°C, guaranteed valid reset state down to VCC = 1V, MR internal pullup resistance of 63kΩ, and SC70-4 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX6384XS29D4+T integrates a precision voltage comparator monitoring VCC against a trimmed 2.93V threshold, an internal timer for 1120ms VCC reset assertion after power-up, and a separate 140ms timer for manual reset deassertion. Its MR input includes built-in debounce logic and a 63kΩ internal pullup resistor, eliminating external components for basic reset initiation.

This device uses BiCMOS process technology to achieve ultra-low quiescent current (3μA at 1.8V) while maintaining ±2.5% threshold accuracy across temperature and ensuring reset output validity down to VCC = 1V - critical for deep-sleep microcontroller applications where supply rails collapse slowly during shutdown.

Key Specifications

Pinout & Package

MAX6384XS29D4+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 high-density portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6384XS29D4+T/V, the automotive variant adds qualification rigor without altering pinout or function; compared with TPS3808G33DBVR, MAX6384XS29D4+T offers factory-set timing, integrated MR, and broader voltage support - making it superior for compact, dual-function reset supervision in portable and industrial edge devices.

Availability

MAX6384XS29D4+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply across long-lifecycle production programs.

Supply support for MAX6384XS29D4+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6381–MAX6390 family was designed specifically for low-voltage, low-power microprocessor supervision in space- and energy-constrained applications - emphasizing precision threshold accuracy, ultra-low ICC, and integrated reset timing without external components.

FAQ

What is the exact reset threshold voltage of MAX6384XS29D4+T and how stable is it over temperature?

The MAX6384XS29D4+T has a factory-set reset threshold of 2.93V, specified with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser trimming during production and verified by design - ensuring reliable brownout detection in automotive and industrial environments without recalibration.

Does MAX6384XS29D4+T require external components for basic operation?

No, MAX6384XS29D4+T operates autonomously with only VCC, GND, and optional MR connection. Its 63kΩ internal MR pullup resistor enables direct switch-to-GND implementation, and the push-pull active-low RESET output drives microcontroller reset pins without external pullups - reducing BOM count and board area.

What is the difference between the VCC reset timeout and manual reset timeout in MAX6384XS29D4+T?

MAX6384XS29D4+T uses two independent timers: a 1120ms minimum timeout triggered when VCC rises above 2.93V (ensuring stable power before release), and a 140ms minimum timeout activated when the MR pin transitions from low to high (providing fast, user-initiated reset). This separation prevents slow power-up from delaying diagnostic mode entry.

Can MAX6384XS29D4+T operate reliably at VCC = 1.2V?

Yes, MAX6384XS29D4+T guarantees correct reset output logic state down to VCC = 1.0V. At 1.2V, it maintains full functionality including accurate 2.93V threshold comparison, 1120ms timeout timing, and MR input detection - making it suitable for ultra-low-voltage applications such as energy-harvesting sensor nodes.

Is MAX6384XS29D4+T pin-compatible with older Maxim reset ICs like MAX809?

Yes, MAX6384XS29D4+T is explicitly pin-compatible with MAX809/MAX810/MAX803 and other legacy supervisors in the same SC70-4 footprint. This allows drop-in replacement in existing designs without PCB revision, preserving layout integrity while upgrading to lower ICC (3μA vs. ~15μA) and tighter threshold accuracy (±2.5% vs. ±5%).