Analog Devices Inc./Maxim Integrated MAX6385XS27D1-T

Overview

MAX6385XS27D1-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.70V reset threshold, 1ms minimum reset timeout, and manual reset input (MR). It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6385XS27D1-T datasheet, MAX6385XS27D1-T pinout, MAX6385XS27D1-T application, or MAX6385XS27D1-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR input pullup resistance (63kΩ), SC70-4 package footprint, and compatibility with dual-voltage systems requiring guaranteed reset assertion during VCC transients.

Technical Context

The MAX6385XS27D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over temperature, paired with a monolithic timer generating a fixed 1ms minimum reset timeout after VCC recovery. Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly upon timeout completion.

It integrates a debounced manual reset input (MR) with internal 63kΩ pullup resistor, supporting TTL/CMOS logic levels and momentary switch interfaces without external components. The device operates across full industrial temperature range (−40°C to +125°C) and maintains functional reset behavior down to VCC = 1V.

Key Specifications

Pinout & Package

MAX6385XS27D1-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. This compact footprint supports high-density PCB layouts in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS27D1-T, MAX809TRD1-T offers simpler supervision but no MR functionality or SC70-4 footprint, while TPS3808G125DBVR provides programmability at the expense of higher quiescent current and layout overhead - MAX6385XS27D1-T delivers optimal balance of precision, size, and integrated features for fixed-threshold, MR-enabled designs.

Availability

MAX6385XS27D1-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term lifecycle support.

Supply support for MAX6385XS27D1-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 reset supervisors optimized for space-constrained, battery-sensitive systems where guaranteed reset timing and minimal supply current are critical.

FAQ

What is the exact reset threshold voltage of MAX6385XS27D1-T?

The MAX6385XS27D1-T has a factory-set reset threshold of 2.70V, with guaranteed accuracy of ±2.5% over the full operating temperature range (−40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "27" suffix in the part number. The MAX6385XS27D1-T does not require external calibration or trimming to achieve this specification.

Does MAX6385XS27D1-T support manual reset functionality?

Yes, the MAX6385XS27D1-T includes a dedicated active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces the RESET output high for the full 1ms timeout period, even if VCC remains above threshold. This feature is explicitly documented in the Pin Description and Features sections for the MAX6384–MAX6386/MAX6390 variants, which include MAX6385XS27D1-T.

What package type and dimensions does MAX6385XS27D1-T use?

The MAX6385XS27D1-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is confirmed in the Ordering Information table and Package Information section of the datasheet, and is distinct from the 3-pin SC70 used by MAX6381–MAX6383 or the 6-pin μDFN used by LT-suffixed variants.

What is the minimum reset timeout period for MAX6385XS27D1-T?

The MAX6385XS27D1-T has a minimum reset timeout period of 1ms, indicated by the "D1" suffix in the part number. This value is specified in the Reset Timeout Delay table and verified in the Electrical Characteristics section under tRP for D1 configuration. The timeout begins when VCC rises above the 2.70V threshold and guarantees RESET remains asserted for ≥1ms before deassertion.

Is MAX6385XS27D1-T compatible with AEC-Q100 automotive qualification?

The base MAX6385XS27D1-T is not AEC-Q100 qualified; however, automotive-grade versions exist with "/V" suffix (e.g., MAX6385XS27D1/V+T), as noted in the Ordering Information and Features sections. These /V variants undergo additional stress testing and screening per AEC-Q100 Rev G requirements and are explicitly designated for automotive applications - the standard MAX6385XS27D1-T is rated for industrial temperature range only.