Analog Devices Inc./Maxim Integrated MAX6385XS36D1-T

Overview

MAX6385XS36D1-T from Maxim Integrated is a precision micropower voltage supervisor IC with active-high push-pull reset output, factory-set 3.60V reset threshold (±2.5% over –40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) featuring internal 63kΩ pullup. It monitors single supply rails in low-power embedded systems where reliable power-on reset and brownout protection are critical - such as battery-powered IoT sensors and industrial microcontroller units.

For engineers reviewing the MAX6385XS36D1-T datasheet, MAX6385XS36D1-T pinout, MAX6385XS36D1-T application, or MAX6385XS36D1-T equivalent, key selection considerations include its 3μA supply current at 1.8V, guaranteed valid reset output down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with manual reset switch integration without external components.

Technical Context

The MAX6385XS36D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 1ms minimum reset assertion period after VCC recovers above 3.60V or after MR release.

It features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinking 3.2mA (VOL ≤ 0.4V), plus a debounced MR input with 1µs minimum pulse width and 100ns glitch rejection - enabling robust reset initiation in noisy environments.

Key Specifications

Pinout & Package

MAX6385XS36D1-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 voltage supervisor applications.

Compared with MAX6385XS36D1-T, MAX6326XR36D1+T requires external pullup and changes reset polarity, while TPS3123E18DBVR offers mismatched threshold and no MR - making MAX6385XS36D1-T uniquely suited for 3.6V-supervised, manually resettable, ultra-low-power applications in compact SC70 layouts.

Availability

MAX6385XS36D1-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered environmental sensors, automotive body control modules, and medical wearable diagnostic devices requiring stable component supply and long-term lifecycle support.

Supply support for MAX6385XS36D1-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, automotive, and computing applications.

The MAX6381–MAX6390 family delivers low-power, high-accuracy voltage supervision in miniature packages - engineered specifically for space- and energy-constrained microcontroller-based systems requiring guaranteed reset behavior across extreme temperatures.

FAQ

What is the exact reset threshold voltage of MAX6385XS36D1-T and how stable is it over temperature?

The MAX6385XS36D1-T has a factory-set nominal reset threshold of 3.60V, with guaranteed tolerance of ±2.5% over the full operating range of –40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning drift is limited to ±0.022V across the entire range - ensuring predictable brownout detection in automotive and industrial environments without external calibration.

Does MAX6385XS36D1-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6385XS36D1-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, MR must be driven below 0.3×VCC (e.g., <1.0V at VCC = 3.3V) for ≥1µs. The pin rejects glitches <100ns and tolerates TTL/CMOS logic levels - enabling direct connection to switches, GPIOs, or open-drain drivers without external components.

What is the output configuration of MAX6385XS36D1-T, and can it drive a standard microcontroller reset input directly?

MAX6385XS36D1-T features an active-high push-pull RESET output, eliminating the need for an external pullup resistor. It sources up to 800µA at VOH ≥ 0.8×VCC (for VCC ≥ 4.5V) and sinks up to 3.2mA at VOL ≤ 0.4V - fully compatible with standard µP reset inputs such as those on STM32, PIC, and MSP430 families without level-shifting or additional passives.

What package type and dimensions does MAX6385XS36D1-T use, and is it RoHS-compliant?

MAX6385XS36D1-T is supplied in a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm pin pitch. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. This compact footprint supports high-density PCB layouts in portable and wearable electronics while maintaining thermal performance (θJA = 322.6°C/W on multilayer board).

How does MAX6385XS36D1-T behave during deep brownout conditions, and what is its minimum functional VCC?

MAX6385XS36D1-T guarantees correct reset output logic state down to VCC = 1.0V - meaning it continues asserting or deasserting RESET predictably even as supply collapses. Below 1.0V, the device ceases operation, but the push-pull output remains in its last valid state until VCC drops further. This behavior prevents metastability in µP reset lines during uncontrolled power loss.