Analog Devices Inc./Maxim Integrated MAX6388XS30D5-T

Overview

MAX6388XS30D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.00V reset threshold (±2.5% over –40°C to +125°C), 280ms minimum VCC 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 controllers and intelligent instrumentation requiring reliable power-up/brownout protection.

For engineers reviewing the MAX6388XS30D5-T datasheet, MAX6388XS30D5-T pinout, MAX6388XS30D5-T application, or MAX6388XS30D5-T equivalent, key selection criteria include its 3.00V threshold accuracy, 280ms timeout, 4-pin SC70 package, dual-supply monitoring capability via RESET IN, and compatibility with systems requiring active-high reset assertion without external pullup.

Technical Context

The MAX6388XS30D5-T integrates a precision voltage comparator monitoring VCC against a trimmed 3.00V threshold and a separate auxiliary comparator referenced to +1.27V at RESET IN, enabling independent monitoring of two supply rails. Its internal timer enforces a guaranteed minimum 280ms reset assertion after VCC recovery or RESET IN recovery.

It features an active-high push-pull RESET output capable of sourcing ≥500µA at VCC ≥2.5V while maintaining VOH ≥0.8×VCC, and accepts MR-level logic on RESET IN with ≤50nA leakage. The device operates across –40°C to +125°C and supports stable reset assertion during negative-going VCC transients up to 35µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6388XS30D5-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, optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6388XS30D5-T, MAX6388XS30D2-T offers reduced reset duration for speed-critical systems, while TLV803EB30DBZR trades dual-rail capability for smaller footprint and lower unit cost in single-rail deployments.

Availability

MAX6388XS30D5-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller supervision, dual-voltage microcontroller systems, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for MAX6388XS30D5-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, communications, and computing markets.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for resource-constrained embedded systems where reliability across extreme temperatures and dual-rail operation are critical.

FAQ

What is the exact reset threshold voltage of the MAX6388XS30D5-T and how stable is it over temperature?

The MAX6388XS30D5-T has a factory-set reset threshold of 3.00V with ±2.5% accuracy over the full –40°C to +125°C operating range. This specification is guaranteed by design and ensures consistent brownout detection across industrial and automotive environments without requiring external calibration. The MAX6388XS30D5-T maintains this stability using laser-trimmed references and BiCMOS process technology.

Does the MAX6388XS30D5-T support monitoring of two different voltage rails simultaneously?

Yes, the MAX6388XS30D5-T supports dual-rail monitoring: VCC is monitored against its 3.00V threshold, and the RESET IN pin monitors a second voltage against an internal +1.27V reference. By connecting a resistor divider to RESET IN, users can set a custom threshold for the auxiliary rail. The MAX6388XS30D5-T asserts reset if either rail falls below its respective threshold, making it ideal for SoC or multi-supply MCU systems.

What is the function of the RESET output on the MAX6388XS30D5-T and what drive capability does it provide?

The RESET output of the MAX6388XS30D5-T is an active-high push-pull driver, meaning it actively drives high during reset assertion and low otherwise-no external pullup is needed. At VCC ≥2.5V, it sources ≥500µA while maintaining VOH ≥0.8×VCC, ensuring compatibility with standard CMOS reset inputs. This architecture simplifies PCB layout and improves noise immunity compared to open-drain alternatives.

How long does the MAX6388XS30D5-T hold the reset signal after VCC recovers above the threshold?

The MAX6388XS30D5-T holds the RESET signal asserted for a minimum of 280ms after VCC rises above the 3.00V threshold. This guaranteed timeout is defined by an internal precision timer and ensures sufficient hold-off for microcontroller clock stabilization, PLL lock, and firmware initialization. The actual duration may vary slightly with temperature but remains ≥280ms across –40°C to +125°C.

Is the MAX6388XS30D5-T suitable for automotive applications and what qualifications does it meet?

The MAX6388XS30D5-T is not explicitly automotive-qualified; its ordering code lacks the "/V" suffix required for AEC-Q100 qualification. While it operates from –40°C to +125°C and meets industrial reliability standards, designers targeting automotive body control or infotainment systems should select the /V-qualified variant (e.g., MAX6388XS30D5/V+T) to ensure full AEC-Q100 compliance. The MAX6388XS30D5-T remains appropriate for industrial and extended-temperature commercial applications.