Analog Devices Inc./Maxim Integrated MAX6385XS30D1-T

Overview

MAX6385XS30D1-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 3.00V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and integrated debounced manual reset input (MR). It monitors VCC in systems requiring reliable power-on reset for microprocessors operating from 1.8V to 5.0V supply rails, such as battery-powered instrumentation and industrial controllers.

For engineers reviewing the MAX6385XS30D1-T datasheet, MAX6385XS30D1-T pinout, MAX6385XS30D1-T application, or MAX6385XS30D1-T equivalent, key selection criteria include its 3.00V threshold accuracy, 1ms reset delay, MR input compatibility with TTL/CMOS logic, guaranteed valid output down to VCC = 1V, and RoHS-compliant 4-pin SC70 package.

Technical Context

The MAX6385XS30D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across temperature, paired with a monolithic timer generating a fixed 1ms minimum reset assertion period after VCC recovery. Its MR input features an internal 63kΩ pullup resistor and supports noise-immune manual reset initiation without external debounce components.

This device belongs to the MAX6384–MAX6390 family of single-supply supervisors, distinguished by active-high push-pull RESET output, 4-pin SC70 packaging, and support for standard reset thresholds (e.g., 3.00V) and timing codes (D1 = 1ms). It does not include auxiliary RESET IN functionality or dual-voltage monitoring capability.

Key Specifications

Pinout & Package

MAX6385XS30D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.75mm with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS30D1-T, MAX6385XS30D2-T extends reset assertion for timing-critical boot sequences, while TLV809K30DBZR reduces footprint and cost at the expense of MR functionality and output drive strength-making it appropriate only for basic reset-only roles without manual intervention.

Availability

MAX6385XS30D1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC modules, medical diagnostic sensors, and automotive body control units requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for MAX6385XS30D1-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 industrial, automotive, communications, and computing applications.

The MAX6384–MAX6390 product line delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and power-constrained microprocessor systems needing reliable, pin-efficient reset generation with manual reset capability.

FAQ

What is the exact reset threshold voltage of MAX6385XS30D1-T and how stable is it over temperature?

The MAX6385XS30D1-T has a factory-set nominal reset threshold of 3.00V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the datasheet, where VTH min/max values at temperature extremes are explicitly listed as 2.93V and 3.08V respectively. The device achieves this stability through laser-trimmed bandgap reference circuitry and low-tempco design.

Does MAX6385XS30D1-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6385XS30D1-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 (for VTH < 4V) for at least 1µs. The MR pin accepts TTL- or CMOS-compatible logic levels and can be interfaced directly with a normally-open momentary switch to GND. No external debounce components are required due to built-in filtering.

What is the function of the RESET output on MAX6385XS30D1-T, and how does it behave during power-up?

The RESET output of MAX6385XS30D1-T is an active-high push-pull driver. During power-up, RESET remains low until VCC rises above 3.00V; once exceeded, RESET transitions high and stays high for a minimum of 1ms (the D1 timeout period) to ensure microprocessor initialization completes. This behavior is guaranteed down to VCC = 1V, meaning RESET remains logically valid even during deep brownout conditions.

Which package type and footprint does MAX6385XS30D1-T use, and are land patterns available?

MAX6385XS30D1-T uses the 4-pin SC70 package (package code X4+1, outline number 21-0098). Its land pattern (footprint) is documented as number 90-0187 on Maxim's packaging resource page. The package measures 1.2mm × 1.6mm with 0.65mm lead pitch and is RoHS-compliant (indicated by the "+" suffix in the part number). Standard solder reflow profiles apply, with peak temperature up to +260°C.

Can MAX6385XS30D1-T monitor a second voltage rail, and does it support auxiliary reset inputs?

No, MAX6385XS30D1-T does not support auxiliary voltage monitoring. It is a single-supply supervisor that monitors only the VCC rail. Auxiliary RESET IN functionality is exclusive to the MAX6387/MAX6388/MAX6389 variants in the same family. The MAX6385XS30D1-T pinout contains no RESET IN terminal, and its internal architecture lacks the secondary comparator required for dual-rail supervision.