Analog Devices Inc./Maxim Integrated MAX6385XS20D7-T

Overview

MAX6385XS20D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.0V reset threshold (±2.5% over –40°C to +125°C), and 1200ms minimum VCC reset timeout. It monitors single supply voltage in battery-powered or embedded systems and guarantees valid reset state down to VCC = 1V. Designed for critical μP power-up sequencing in portable instrumentation.

For engineers reviewing the MAX6385XS20D7-T datasheet, MAX6385XS20D7-T pinout, MAX6385XS20D7-T application, or MAX6385XS20D7-T equivalent, key selection criteria include reset threshold accuracy, manual reset input compatibility, push-pull output drive capability, and SC70-4 package footprint constraints.

Technical Context

The MAX6385XS20D7-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer enforces a guaranteed minimum 1200ms reset assertion after VCC rises above 2.0V.

It features a debounced active-low manual reset input (MR) with internal 63kΩ pullup resistor, supporting TTL/CMOS logic drive and requiring no external debounce circuitry. Reset output remains high during MR assertion and for the full 1200ms timeout after MR release.

Key Specifications

Pinout & Package

MAX6385XS20D7-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 portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS20D4-T, the MAX6385XS20D7-T extends reset hold time by 80ms for robustness in slow-rising supplies; versus TPS3808G25DBVR, it offers integrated MR and tighter threshold tolerance but requires SC70-4 layout adaptation.

Availability

MAX6385XS20D7-T is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial PLC modules, automotive body controllers, and portable test equipment requiring stable component supply and long-term lifecycle support.

Supply support for MAX6385XS20D7-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 power management, sensing, and interface applications in industrial, automotive, and computing markets.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and energy-constrained embedded systems requiring guaranteed reset behavior across extreme temperatures.

FAQ

What is the exact reset threshold voltage of the MAX6385XS20D7-T and how stable is it over temperature?

The MAX6385XS20D7-T has a factory-set nominal reset threshold of 2.0V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than 15mV across the entire range. This stability is confirmed in the Electrical Characteristics table of the official datasheet and validated by Maxim's production testing.

Does the MAX6385XS20D7-T support manual reset functionality, and what are the electrical requirements for the MR pin?

Yes, the MAX6385XS20D7-T includes a debounced active-low 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., <0.6V at VCC = 2.0V). The MR input accepts standard TTL/CMOS logic levels and tolerates voltages up to VCC + 0.3V. No external components are required unless additional noise immunity is needed.

What is the function of the RESET output on the MAX6385XS20D7-T, and how does it behave during power-up?

The RESET output of the MAX6385XS20D7-T is an active-high push-pull driver. During power-up, it remains low until VCC rises above the 2.0V threshold, then stays low for the full 1200ms timeout period before transitioning high. This ensures the connected microprocessor remains held in reset long enough for all internal clocks and regulators to stabilize, preventing erratic startup behavior.

Can the MAX6385XS20D7-T operate reliably at very low supply voltages, and what is its minimum functional VCC?

Yes, the MAX6385XS20D7-T guarantees correct reset output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below 1.0V, reset behavior is not characterized. This capability supports applications with deeply discharged batteries or low-dropout regulator brownout conditions, where other supervisors may fail to assert reset correctly.

What package type and footprint does the MAX6385XS20D7-T use, and are land patterns available?

The MAX6385XS20D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. Official land patterns and soldering guidelines are published by Maxim Integrated at maximintegrated.com/packages. The "+T" suffix confirms RoHS compliance and tape-and-reel packaging for automated assembly.