Analog Devices Inc./Maxim Integrated MAX6385XS38D2-T

Overview

MAX6385XS38D2-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 3.80V reset threshold, 20ms minimum VCC reset timeout, and manual reset input (MR). It monitors single supply voltage in battery-powered or embedded systems, guarantees valid reset output down to VCC = 1V, and consumes only 3μA at +1.8V. Used in portable instrumentation and microcontroller power sequencing.

For engineers reviewing the MAX6385XS38D2-T datasheet, MAX6385XS38D2-T pinout, MAX6385XS38D2-T application, or MAX6385XS38D2-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over -40°C to +125°C), MR debounce capability, SC70-4 package footprint, and compatibility with dual-voltage monitoring designs requiring auxiliary reset inputs.

Technical Context

The MAX6385XS38D2-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance across temperature and a monolithic timer for deterministic 20ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup enables direct switch connection without external components.

It features active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC, and guarantees correct logic state down to VCC = 1V - critical for brownout detection in low-voltage microcontrollers.

Key Specifications

Pinout & Package

MAX6385XS38D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS38D2-T, the LT version offers superior thermal handling in μDFN but increases board area, while the MAX6326 variant trades MR capability and tighter threshold tolerance for lower unit cost - making each suitable for distinct design constraints in portable, industrial, or cost-sensitive applications.

Availability

MAX6385XS38D2-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, and critical μP/microcontroller power monitoring requiring stable component supply and long-term production continuity.

Supply support for MAX6385XS38D2-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 industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervision for space- and energy-constrained embedded systems - targeting portable medical devices, battery-powered instrumentation, and automotive body electronics.

FAQ

What is the guaranteed reset threshold accuracy of MAX6385XS38D2-T over temperature?

The MAX6385XS38D2-T has a factory-set reset threshold of 3.80V with guaranteed ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. This specification is validated across process, voltage, and temperature corners and ensures reliable brownout detection without external calibration - a key requirement for automotive and industrial applications where ambient conditions vary widely. The MAX6385XS38D2-T achieves this using laser-trimmed on-chip resistors and a precision bandgap reference.

Does MAX6385XS38D2-T support manual reset functionality, and how is it implemented?

Yes, MAX6385XS38D2-T includes a debounced manual reset input (MR) on pin 3. It is an active-low input with an internal 63kΩ pullup resistor to VCC, allowing direct connection of a normally open momentary switch to ground. When MR is pulled below 0.3×VCC, the device asserts the active-high RESET output and holds it for the full 20ms timeout period after MR is released. No external debounce components are required, simplifying design and reducing BOM count.

What is the minimum VCC voltage at which MAX6385XS38D2-T guarantees correct RESET output logic state?

MAX6385XS38D2-T guarantees valid RESET output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry cannot maintain defined output levels. This feature ensures deterministic reset behavior during deep brownout events - for example, in lithium battery systems discharging to 1.0V - and prevents metastability or undefined states that could corrupt microcontroller operation. The guarantee applies to both VCC-initiated and MR-initiated reset assertions.

Can MAX6385XS38D2-T be used in dual-voltage monitoring applications?

No, MAX6385XS38D2-T monitors only the VCC supply and does not include an auxiliary RESET IN input. For dual-voltage monitoring, select MAX6387XS38D2-T, MAX6388XS38D2-T, or MAX6389XS38D2-T - members of the same family that integrate a dedicated RESET IN pin compared to the MAX6385XS38D2-T. These alternatives compare an external voltage against a +1.27V internal reference and assert reset if either VCC or RESET IN falls below its respective threshold.

What package type and dimensions does MAX6385XS38D2-T use, and is it RoHS-compliant?

MAX6385XS38D2-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm with gull-wing leads. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact footprint is optimized for space-constrained portable electronics, and the package supports standard reflow soldering profiles with peak temperature up to +260°C.