Analog Devices Inc./Maxim Integrated MAX6385XS16D4-T

Overview

MAX6385XS16D4-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 1.58V reset threshold, 1120ms V_CC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered or space-constrained embedded systems and guarantees valid reset output down to V_CC = 1V. Designed for reliable power-up/brownout detection in portable instrumentation and microcontroller-based controllers.

For engineers reviewing the MAX6385XS16D4-T datasheet, MAX6385XS16D4-T pinout, MAX6385XS16D4-T application, or MAX6385XS16D4-T equivalent, key selection criteria include its 1.58V ±2.5% threshold accuracy over –40°C to +125°C, 3μA supply current at 1.8V, 4-pin SC70 package, and MR input with internal 63kΩ pullup - critical for noise-immune manual reset in industrial edge nodes.

Technical Context

The MAX6385XS16D4-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance across temperature, paired with a monotonic RC-based timeout timer. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after the 1120ms minimum timeout period.

It integrates a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection, referenced to V_CC, and features negative-going V_CC transient immunity up to 35µs for 100mV overdrive - enabling robust operation in electrically noisy environments without external filtering.

Key Specifications

Pinout & Package

MAX6385XS16D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), footprint-compatible with standard 0.65mm pitch PCB assembly processes. Thermal resistance θ_JA = 322.6°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385LT16D4-T, the MAX6385XS16D4-T saves 0.4mm² board area and offers lower thermal resistance in compact layouts; versus TPS3808G15DBVR, it provides integrated MR but trades ±0.5% threshold accuracy for ±2.5% with guaranteed operation down to 1.0V V_CC.

Availability

MAX6385XS16D4-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6385XS16D4-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 ultra-low-power, factory-trimmed reset supervision for space- and energy-constrained microcontroller systems - emphasizing accuracy, noise immunity, and minimal external component count.

FAQ

What is the exact reset threshold voltage of MAX6385XS16D4-T and how stable is it over temperature?

The MAX6385XS16D4-T has a factory-set reset threshold of 1.58V, specified with ±2.5% tolerance over the full –40°C to +125°C operating range. This stability is achieved via laser-trimmed bandgap references and verified by design across temperature extremes, ensuring reliable brownout detection for 1.8V logic domains without recalibration.

Does MAX6385XS16D4-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6385XS16D4-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup to V_CC. To assert reset, MR must be driven below 0.3×V_CC (e.g., <0.54V at 1.8V); it accepts TTL/CMOS logic levels and supports minimum 1µs pulse width with 100ns glitch rejection - eliminating need for external debounce circuitry.

What is the guaranteed minimum reset timeout period for MAX6385XS16D4-T, and how is it triggered?

The MAX6385XS16D4-T guarantees a minimum reset timeout period of 1120ms following either V_CC recovery above 1.58V or MR release. This timeout is generated by an internal RC timer and begins only after the monitored voltage exceeds the threshold - ensuring μP remains held long enough for power stabilization and firmware initialization.

Can MAX6385XS16D4-T operate reliably at very low supply voltages, and what is its minimum functional V_CC?

Yes, MAX6385XS16D4-T guarantees correct RESET output logic state down to V_CC = 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. Below this, the device may cease operation, but between 1.0V and 1.58V, it holds RESET asserted - critical for fail-safe behavior during deep brownout conditions.

What package type and footprint does MAX6385XS16D4-T use, and are land patterns available?

MAX6385XS16D4-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187) with 0.65mm pin pitch. Official land patterns and solder mask specifications are published by Maxim Integrated and fully supported in industry-standard CAD libraries; the "+T" suffix confirms RoHS-compliant lead-free finish.