Analog Devices Inc./Maxim Integrated MAX6385XS22D6-T

Overview

MAX6385XS22D6-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.19V reset threshold, 560ms minimum VCC reset timeout, and debounced manual reset input. It monitors +1.8V to +5.0V supply rails in space-constrained embedded systems, ensuring reliable microprocessor reset during power-up, brownout, or transient events in battery-powered instrumentation.

For engineers reviewing the MAX6385XS22D6-T datasheet, MAX6385XS22D6-T pinout, MAX6385XS22D6-T application, or MAX6385XS22D6-T equivalent, key selection factors include its ±2.5% reset threshold accuracy over –40°C to +125°C, guaranteed valid reset output down to VCC = 1V, 3μA supply current at +1.8V, and 4-pin SC70 package compatibility with manual reset timing requirements.

Technical Context

The MAX6385XS22D6-T implements a precision bandgap-based voltage comparator with internal 2.19V threshold (±2.5% over temperature) and a monolithic timer for fixed 560ms reset assertion after VCC recovery. Its active-high push-pull RESET output drives high upon fault detection and remains asserted for the full timeout period without external components.

It integrates a debounced manual reset input (MR) with internal 63kΩ pullup resistor, supporting TTL/CMOS-compatible logic levels and requiring no external debounce circuitry. MR assertion forces immediate reset and initiates the same 560ms timeout as VCC-induced resets.

Key Specifications

Pinout & Package

MAX6385XS22D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density PCB layouts with thermal resistance θ_JA = 322.6°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR22D6+T and TPS3123E18DBVR, the MAX6385XS22D6-T uniquely combines active-high push-pull output, debounced MR, and ultra-low 3μA supply current in a 4-pin SC70-making it optimal for compact, battery-sensitive designs needing manual reset control without external components.

Availability

MAX6385XS22D6-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with automotive-grade reliability.

Supply support for MAX6385XS22D6-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 connectivity applications, with focus on high-reliability industrial and automotive markets.

The MAX6381–MAX6390 family delivers low-power, factory-trimmed μP supervisors targeting space-constrained, battery-operated, and thermally demanding embedded systems where reset accuracy and long-term stability are critical.

FAQ

What is the exact reset threshold voltage of the MAX6385XS22D6-T and how does it vary with temperature?

The MAX6385XS22D6-T has a factory-set reset threshold of 2.19V, specified with ±2.5% tolerance over the full operating temperature range of –40°C to +125°C. At +25°C, the threshold is guaranteed between 2.13V and 2.24V; this variation is due to a 60ppm/°C tempco, ensuring predictable behavior in automotive and industrial environments where ambient temperature swings are extreme.

Does the MAX6385XS22D6-T require external components to function as a complete reset solution?

No, the MAX6385XS22D6-T operates as a fully self-contained reset supervisor. It requires only VCC and GND connections; the active-high push-pull RESET output needs no external pullup, and the MR input includes a 63kΩ internal pullup resistor. No capacitors, resistors, or additional ICs are needed for basic power-monitoring functionality.

How does the manual reset (MR) input behave during and after activation in the MAX6385XS22D6-T?

When MR is pulled low, the MAX6385XS22D6-T immediately asserts the active-high RESET output. RESET remains high for the full 560ms timeout period after MR returns high-identical to the VCC-induced reset timing. The internal debouncing rejects transients shorter than 100ns, and the 63kΩ pullup ensures MR defaults to inactive when left unconnected.

What is the minimum supply voltage at which the MAX6385XS22D6-T guarantees correct RESET output logic state?

The MAX6385XS22D6-T guarantees valid RESET output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry may not maintain defined output levels. This specification ensures reliable reset assertion during deep brownout conditions common in battery-powered systems nearing end-of-life.

Is the MAX6385XS22D6-T qualified for automotive applications, and what packaging confirms this?

The MAX6385XS22D6-T is not explicitly automotive-qualified; its ordering suffix lacks the "/V" designation required for AEC-Q100 qualification. It is rated for –40°C to +125°C operation and offered in RoHS-compliant 4-pin SC70 packaging (X4+1 outline), but automotive use requires verification against specific vehicle manufacturer requirements and validation of the /V variant (e.g., MAX6385XS22D6/V+T).