Analog Devices Inc./Maxim Integrated MAX6386XS16D1+T

Overview

MAX6386XS16D1+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.58V reset threshold (±2.5% over –40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) with internal 63kΩ pullup. It monitors VCC from +1.0V to +5.5V and consumes only 3μA at +1.8V, enabling reliable power-on reset in space-constrained battery-powered systems.

For engineers reviewing the MAX6386XS16D1+T datasheet, MAX6386XS16D1+T pinout, MAX6386XS16D1+T application, or MAX6386XS16D1+T equivalent, key selection criteria include its 1.58V threshold accuracy, 1ms timeout timing, MR debouncing capability, guaranteed reset validity down to VCC = 1V, and compatibility with SC70-4 packaging for high-density PCB layouts.

Technical Context

The MAX6386XS16D1+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 reset assertion window after VCC rises above 1.58V or after MR release.

It features an open-drain RESET output requiring external pullup, a debounced manual reset input (MR) with 1μs minimum pulse width and 100ns glitch rejection, and operates with valid logic states down to VCC = 1V - critical for brownout detection in ultra-low-voltage systems.

Key Specifications

Pinout & Package

MAX6386XS16D1+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 MAX809S16D1+T and TPS3808G16DBVR, MAX6386XS16D1+T uniquely combines 1.58V threshold accuracy, 1ms timing, MR input, and SC70-4 packaging - making it optimal for compact, field-serviceable embedded systems requiring deterministic brownout response and operator-initiated reset.

Availability

MAX6386XS16D1+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 and long-term production continuity.

Supply support for MAX6386XS16D1+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 supervisory circuits targeting space- and power-constrained microprocessor systems requiring guaranteed reset behavior across wide temperature and voltage ranges.

FAQ

What is the exact reset threshold voltage of MAX6386XS16D1+T and how stable is it over temperature?

The MAX6386XS16D1+T has a factory-set reset threshold of 1.58V (minimum), with nominal value 1.62V and maximum 1.67V at +25°C. Over the full operating range of –40°C to +125°C, the threshold remains within ±2.5% of nominal, corresponding to ±40.5mV variation. Its tempco is specified at 60ppm/°C, ensuring predictable drift in thermal cycling environments. This stability is verified per Maxim's production test flow and documented in the Electrical Characteristics table of the MAX6381–MAX6390 datasheet.

Does MAX6386XS16D1+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6386XS16D1+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., <0.54V at VCC = 1.8V). The minimum valid pulse width is 1μs, and it rejects glitches shorter than 100ns. MR accepts TTL- or CMOS-compatible logic levels and can interface directly with momentary switches or microcontroller GPIOs without external components.

What is the function and timing behavior of the RESET output on MAX6386XS16D1+T?

The RESET output of MAX6386XS16D1+T is an open-drain, active-low signal requiring an external pullup resistor. It asserts (pulls low) whenever VCC falls below 1.58V or MR is activated, and remains asserted for a minimum of 1ms after VCC rises above threshold or MR is released. The output is guaranteed valid down to VCC = 1V, and leakage current is ≤1.0μA when deasserted. This behavior ensures robust reset signaling even during deep brownout conditions.

What package type and dimensions does MAX6386XS16D1+T use, and is it RoHS-compliant?

MAX6386XS16D1+T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. It is RoHS-compliant and lead(Pb)-free, indicated by the "+T" suffix in the part number. The land pattern is documented as 90-0187, and thermal resistance (θJA) is 322.6°C/W on a multilayer board - suitable for thermally constrained portable and automotive PCB layouts.

Can MAX6386XS16D1+T monitor a second voltage rail, and does it support auxiliary reset inputs like RESET IN?

No, MAX6386XS16D1+T does not support auxiliary voltage monitoring. It is a single-supply supervisor that monitors only VCC. The RESET IN feature is exclusive to MAX6387/MAX6388/MAX6389 variants and is not implemented in MAX6386XS16D1+T. Its functionality is strictly limited to VCC supervision, manual reset via MR, and open-drain RESET assertion - confirmed by the Selector Guide and Pin Configuration diagrams in the MAX6381–MAX6390 datasheet.