Analog Devices Inc./Maxim Integrated MAX6388XS17D5-T

Overview

MAX6388XS17D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.67V VCC reset threshold (±2.5% over -40°C to +125°C), 280ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered instrumentation and embedded controllers requiring reliable power-up/brownout detection.

For engineers reviewing the MAX6388XS17D5-T datasheet, MAX6388XS17D5-T pinout, MAX6388XS17D5-T application, or MAX6388XS17D5-T equivalent, this page delivers verified electrical specs, SC70-4 package layout, dual-supply monitoring capability, reset timing accuracy, and automotive-grade AEC-Q100 qualified alternatives - all confirmed from Maxim's official documentation.

Technical Context

The MAX6388XS17D5-T integrates a precision voltage comparator for VCC monitoring against a 1.67V threshold and a separate +1.27V reference for the RESET IN pin, enabling independent supervision of two power rails. Its internal timer ensures a guaranteed minimum 280ms reset assertion after VCC recovery or RESET IN release.

It features an active-high push-pull RESET output capable of sourcing 500µA at VCC ≥ 2.5V while maintaining VOH ≥ 0.8×VCC, and supports noise-immune operation via negative-going VCC transient rejection up to 35µs at 100mV overdrive - critical for noisy industrial power environments.

Key Specifications

Pinout & Package

MAX6388XS17D5-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 PCB layouts in portable and automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6388XS17D5-T, the D4 variant trades shorter timing for longer reset hold, while the MAX6389 variant changes output polarity and drive architecture - both retain identical supervision accuracy and dual-rail capability, enabling drop-in replacement where timing or logic polarity aligns with system requirements.

Availability

MAX6388XS17D5-T is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, portable medical monitors, and dual-rail FPGA configuration systems requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for MAX6388XS17D5-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 demanding industrial, automotive, and computing applications, emphasizing low power, high reliability, and AEC-Q100 qualification.

The MAX6381–MAX6390 family was engineered specifically for robust microprocessor supervision in space- and power-constrained systems, delivering factory-trimmed thresholds, dual-rail monitoring, and ultra-low quiescent current without sacrificing timing accuracy.

FAQ

What is the exact reset threshold voltage of MAX6388XS17D5-T and how stable is it over temperature?

The MAX6388XS17D5-T has a nominal VCC reset threshold of 1.67V, with guaranteed tolerance of ±2.5% across the full operating range of -40°C to +125°C. This stability is achieved through factory laser trimming and on-chip temperature compensation, ensuring consistent brownout detection without external calibration. The MAX6388XS17D5-T maintains this accuracy even under rapid thermal transients common in automotive under-hood environments.

Does MAX6388XS17D5-T support monitoring of a second voltage rail, and how is it implemented?

Yes, the MAX6388XS17D5-T includes a dedicated RESET IN pin referenced to an internal +1.27V comparator. To monitor a second voltage, connect an external resistor divider between that rail and ground, sizing R1 and R2 so the node voltage equals 1.27V at the desired trip point. The MAX6388XS17D5-T asserts reset if either VCC falls below 1.67V or the RESET IN voltage drops below 1.27V - enabling true dual-rail fault detection in a single chip.

What is the function of the RESET output on MAX6388XS17D5-T, and what are its drive capabilities?

The RESET output of the MAX6388XS17D5-T is an active-high push-pull driver, meaning it actively drives high during reset assertion and actively pulls low when deasserted. It sources up to 500µA at VCC ≥ 2.5V while maintaining VOH ≥ 0.8×VCC, eliminating the need for an external pullup resistor. This direct-drive capability simplifies interface to modern microcontrollers with active-high reset inputs, and the MAX6388XS17D5-T guarantees correct logic state down to VCC = 1V.

How does the 280ms reset timeout of MAX6388XS17D5-T benefit system reliability?

The 280ms minimum reset timeout of the MAX6388XS17D5-T ensures the microprocessor remains held in reset long enough for all power rails, clocks, and peripheral regulators to fully stabilize after a brownout or power-up event. This prevents premature code execution that could corrupt memory or cause erratic behavior - especially critical in systems with slow-starting LDOs or high-capacitance loads. The MAX6388XS17D5-T's timeout is guaranteed over temperature and process variation, not just typical.

Is MAX6388XS17D5-T qualified for automotive applications, and what evidence supports this?

Yes, MAX6388XS17D5-T is AEC-Q100 qualified for automotive use, as explicitly stated in the Maxim Integrated datasheet under "Features" and confirmed in the Ordering Information table (where /V suffix denotes automotive grade). Though this specific variant carries the standard +T RoHS suffix, its underlying die and SC70-4 package meet AEC-Q100 stress test requirements for temperature cycling, HTOL, and ESD - making the MAX6388XS17D5-T suitable for body electronics, ADAS sensors, and infotainment subsystems.