Analog Devices Inc./Maxim Integrated MAX6386XS16D3+T

Overview

MAX6386XS16D3+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), 140ms minimum VCC reset timeout, and debounced manual reset input (MR) with internal 63kΩ pullup. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, enabling reliable power-on reset in battery-powered embedded controllers.

For engineers reviewing the MAX6386XS16D3+T datasheet, MAX6386XS16D3+T pinout, MAX6386XS16D3+T application, or MAX6386XS16D3+T equivalent, key selection criteria include its 1.58V threshold accuracy, MR-driven reset assertion with guaranteed validity down to VCC = 1V, open-drain output requiring external pullup, and 4-pin SC70 package compatibility with space-constrained portable systems.

Technical Context

The MAX6386XS16D3+T integrates a precision voltage comparator monitoring VCC against a trimmed 1.58V reference, an internal timer for 140ms reset timeout after VCC recovery, and a dedicated MR input with 1µs minimum pulse width support and 100ns glitch rejection. Its open-drain RESET output ensures level-shifting capability across mixed-voltage systems.

It guarantees correct reset logic state down to VCC = 1V and provides negative-going VCC transient immunity up to 35µs for 100mV overdrive, validated across −40°C to +125°C. The device lacks auxiliary RESET IN functionality-exclusive to MAX6387–MAX6389-and does not support dual-supply monitoring.

Key Specifications

Pinout & Package

MAX6386XS16D3+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. Pin 1 is RESET (open-drain active-low), Pin 2 is VCC, Pin 3 is MR (active-low manual reset), and Pin 4 is GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6386XS16D3+T, MAX6384XS16D3+T offers higher drive strength but forfeits bus-sharing capability, while MAX6326XR16D3+T reduces size and cost at the expense of MR functionality-making MAX6386XS16D3+T optimal for designs requiring both robust brownout protection and field-serviceable reset initiation.

Availability

MAX6386XS16D3+T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, automotive body control modules, and smart home hub power sequencers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6386XS16D3+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 communications applications.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and thermally harsh embedded systems-specifically targeting applications where supply stability, small footprint, and guaranteed reset behavior down to 1V are critical.

FAQ

What is the exact reset threshold voltage of MAX6386XS16D3+T and how stable is it over temperature?

The MAX6386XS16D3+T has a factory-set nominal reset threshold of 1.58V, with guaranteed accuracy of ±2.5% across the full operating temperature range of −40°C to +125°C. This stability is achieved through laser trimming of on-chip resistors and is documented in the Electrical Characteristics table under "VCC Reset Threshold" with tempco of 60ppm/°C. The MAX6386XS16D3+T maintains this specification without external components.

Does MAX6386XS16D3+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6386XS16D3+T features a debounced manual reset input (MR) that asserts reset when pulled low. The MR pin includes an internal 63kΩ pullup resistor to VCC, so it may be left floating if unused. It accepts TTL- or CMOS-compatible logic levels, requires a minimum pulse width of 1µs, and rejects glitches shorter than 100ns. The MAX6386XS16D3+T guarantees MR-to-RESET delay of 200ns maximum.

What package type and footprint does MAX6386XS16D3+T use, and is it RoHS-compliant?

MAX6386XS16D3+T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. This package is pin-compatible with other 4-pin SC70 supervisory circuits in the MAX6381–MAX6390 family and supports standard reflow soldering profiles up to +260°C.

Can MAX6386XS16D3+T monitor a second voltage rail, such as a backup battery or I/O supply?

No, MAX6386XS16D3+T monitors only the VCC supply rail and does not include an auxiliary RESET IN input. That feature is exclusive to MAX6387/MAX6388/MAX6389 variants, which compare an external voltage at the RESET IN pin against an internal 1.27V reference. The MAX6386XS16D3+T is a single-rail supervisor; dual-voltage monitoring requires selecting one of those alternate parts.

What is the minimum supply voltage at which MAX6386XS16D3+T guarantees correct reset output behavior?

MAX6386XS16D3+T guarantees valid RESET output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this voltage, the internal comparator and timer may not function reliably. This 1V guarantee enables safe reset assertion during deep brownout conditions where other supervisors fail-confirming robust operation in the MAX6386XS16D3+T's intended low-voltage applications.