Analog Devices Inc./Maxim Integrated MAX6385XS30D6-T

Overview

MAX6385XS30D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.00V ±2.5% reset threshold, and 560ms minimum VCC reset timeout period. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6385XS30D6-T datasheet, MAX6385XS30D6-T pinout, MAX6385XS30D6-T application, or MAX6385XS30D6-T equivalent, key selection criteria include reset threshold accuracy over temperature (±2.5% from −40°C to +125°C), manual reset input with internal 63kΩ pullup, 4-pin SC70 package footprint, and compatibility with dual-voltage systems requiring stable reset assertion during supply transients.

Technical Context

The MAX6385XS30D6-T implements a precision voltage comparator with ±2.5% threshold accuracy over −40°C to +125°C and 60ppm/°C tempco, paired with a monolithic timer for fixed 560ms reset timeout after VCC recovery. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after timeout, eliminating need for external pullup.

It integrates a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection, referenced to VCC with 0.3×VCC/0.7×VCC logic thresholds. MR features an internal 63kΩ pullup resistor, enabling direct connection of a momentary switch to GND without external components.

Key Specifications

Pinout & Package

MAX6385XS30D6-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, suitable 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 MAX6385XS30D6-T, the MAX6385XS30D3-T reduces reset hold time by 420ms-critical for latency-sensitive boot sequences-while the TPS3808G30DBVR trades push-pull simplicity for 1.6μA lower ICC, demanding external biasing and careful noise management on the reset line.

Availability

MAX6385XS30D6-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, dual-voltage systems, and critical microprocessor power monitoring requiring stable component supply and long-term lifecycle support.

Supply support for MAX6385XS30D6-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, sensing, and interface applications, with emphasis on low-power, high-reliability solutions.

The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for battery-operated, automotive, and industrial systems needing guaranteed reset assertion during brownout, startup, and transient events.

FAQ

What is the exact reset threshold voltage of the MAX6385XS30D6-T and how tightly is it specified?

The MAX6385XS30D6-T has a factory-set reset threshold of 3.00V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C). At +25°C, the threshold is 3.00V ±1.5%, and the tempco is 60ppm/°C. This specification ensures reliable detection of 3.3V rail collapse without false triggering during thermal cycling. The "30" in the part number explicitly denotes the 3.00V nominal threshold.

Does the MAX6385XS30D6-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, the MAX6385XS30D6-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, drive MR below 0.3×VCC (e.g., <0.9V at 3.0V VCC); to release, allow it to rise above 0.7×VCC. It accepts TTL/CMOS logic levels and supports minimum pulse widths of 1µs. No external components are required unless noise immunity is needed-then a 0.1µF capacitor to GND is recommended.

What package type and footprint does the MAX6385XS30D6-T use, and is it RoHS-compliant?

The MAX6385XS30D6-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. It is lead(Pb)-free and RoHS-compliant, indicated by the "+T" suffix. This compact footprint provides board-area savings over legacy SOT-23 packages while maintaining compatibility with standard reflow processes and automated assembly lines.

How does the MAX6385XS30D6-T behave when VCC drops below 1.0V, and what is its minimum functional supply voltage?

The MAX6385XS30D6-T guarantees correct reset output logic state (active-high) for VCC ≥ 1.0V. Below 1.0V, the device ceases to function predictably-reset output may float or become invalid. For applications requiring reset assertion all the way to 0V, external pulldown resistors are needed on push-pull outputs (though this is not applicable to open-drain variants). The 1.0V lower limit is specified in Absolute Maximum Ratings and Electrical Characteristics tables.

Is the MAX6385XS30D6-T pin-compatible with industry-standard reset supervisors like the MAX809 or TPS3808 series?

The MAX6385XS30D6-T is pin-compatible with other members of the MAX6384–MAX6390 family in the 4-pin SC70 package (e.g., MAX6384XS30D6-T), but not with MAX809 (3-pin SOT-23) or TPS3808 (5-pin SOT-23). Its pinout-VCC, RESET, MR, GND-differs from both. However, it is functionally compatible with those parts in system-level design, and the datasheet confirms pin compatibility within its own family and with legacy Maxim reset ICs sharing the same package configuration.