Analog Devices Inc./Maxim Integrated MAX6385XS41D1-T

Overview

MAX6385XS41D1-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.10V reset threshold, 1ms minimum reset timeout, and manual reset input (MR), designed for reliable power-up/power-down monitoring in low-voltage embedded systems operating from +1.8V to +5.0V supply. It consumes only 3μA at +1.8V and guarantees valid reset output down to VCC = 1V.

For engineers reviewing the MAX6385XS41D1-T datasheet, MAX6385XS41D1-T pinout, MAX6385XS41D1-T application, or MAX6385XS41D1-T equivalent, key selection criteria include its 4.10V ±2.5% threshold accuracy over –40°C to +125°C, 1ms reset delay, MR debounce capability, SC70-4 package footprint, and compatibility with dual-rail voltage monitoring architectures.

Technical Context

The MAX6385XS41D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across temperature, paired with a monolithic timer that enforces a guaranteed minimum 1ms reset assertion after VCC recovers above 4.10V. Its internal 63kΩ MR pullup resistor enables direct connection of a momentary switch to GND without external components.

Unlike open-drain variants, this device uses a push-pull active-high RESET output capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC - eliminating need for external pullups and ensuring deterministic logic levels during brownout recovery.

Key Specifications

Pinout & Package

MAX6385XS41D1-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 PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS41D1-T, MAX6326XR41D1+T lacks MR functionality and inverts reset polarity, while TPS3808G33DBVR offers lower current but sacrifices threshold flexibility and manual reset - making MAX6385XS41D1-T optimal for 4.1V rail monitoring with field-serviceability needs.

Availability

MAX6385XS41D1-T is available at Aetrix Electronics and suitable for industrial PLCs, medical wearables, automotive body controllers, and smart home gateways requiring stable component supply with AEC-Q100-aligned reliability.

Supply support for MAX6385XS41D1-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, emphasizing low power, high accuracy, and robustness.

The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across wide temperature and voltage ranges.

FAQ

What is the exact reset threshold voltage of MAX6385XS41D1-T and how tightly is it specified?

The MAX6385XS41D1-T has a factory-set nominal reset threshold of 4.10V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This means the actual threshold falls between 4.00V and 4.20V at +25°C, and between 3.99V and 4.21V across temperature extremes - critical for reliable brownout detection in automotive and industrial applications where supply rails may drift.

Does MAX6385XS41D1-T support manual reset functionality, and how is it implemented?

Yes, MAX6385XS41D1-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, allowing direct connection of a normally open momentary switch to GND. When MR is pulled low, the device asserts the active-high RESET output immediately and holds it for the full 1ms timeout period after MR is released - enabling field-serviceable reset without external components.

What package type and dimensions does MAX6385XS41D1-T use, and is it RoHS-compliant?

MAX6385XS41D1-T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline 21-0098) measuring 2.0mm × 2.1mm × 0.95mm. The package code "X4+1" confirms RoHS status, and the land pattern number is 90-0187 - optimized for reflow soldering and high-density PCB layouts in portable and automotive electronics.

How does MAX6385XS41D1-T behave when VCC drops below 1.0V, and what is its minimum operating voltage?

MAX6385XS41D1-T guarantees correct RESET output logic state down to VCC = 1.0V, meaning it continues asserting reset reliably as supply voltage collapses. Below 1.0V, the device ceases functional operation, but the last valid reset state is maintained until power loss. Its absolute minimum VCC rating is 1.0V, and maximum is 5.5V - supporting operation across single-cell Li-ion, coin-cell, and standard 3.3V/5V systems.

Is MAX6385XS41D1-T pin-compatible with any legacy Maxim reset supervisors, and which ones?

Yes, MAX6385XS41D1-T is pin-compatible with MAX809, MAX810, MAX803, MAX6326, MAX6327, MAX6328, MAX6346, MAX6347, MAX6348, and MAX6711/MAX6712/MAX6713 families in the same SC70-4 package. This allows drop-in replacement in existing designs without PCB changes, preserving layout integrity while upgrading to improved threshold accuracy, lower quiescent current, and integrated MR functionality.