Analog Devices Inc./Maxim Integrated MAX6388XS30D4-T

Overview

MAX6388XS30D4-T from Maxim Integrated is a precision microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.00V ±2.5% reset threshold, and 1120ms minimum V_CC reset timeout. It monitors single supply voltage (V_CC) and auxiliary input (RESET IN), consumes only 3μA at 1.8V, and operates from -40°C to +125°C. Used in dual-voltage systems for reliable power-up sequencing and brownout protection.

For engineers reviewing the MAX6388XS30D4-T datasheet, MAX6388XS30D4-T pinout, MAX6388XS30D4-T application, or MAX6388XS30D4-T equivalent, key selection criteria include its 3.00V reset threshold accuracy, 1120ms timeout, auxiliary voltage monitoring capability, 4-pin SC70 package, and guaranteed reset validity down to V_CC = 1V.

Technical Context

The MAX6388XS30D4-T integrates a precision bandgap reference and comparator to monitor both V_CC and an external RESET IN signal against fixed (V_TH = 3.00V) and internal (V_THRST = 1.27V) thresholds. Reset assertion occurs when either falls below its respective threshold, with independent timing control.

Its auxiliary RESET IN input accepts resistor-divider networks for user-adjustable secondary voltage monitoring, while the active-high push-pull output drives directly into μP reset inputs without external pullup. The device guarantees correct logic state for V_CC ≥ 1V and exhibits immunity to negative-going transients up to 35µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6388XS30D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6388XS30D4-T, the MAX6388XS30D4+T offers identical functionality without automotive qualification, while the MAX6389XS30D4-T provides the same supervision features but requires external pullup due to open-drain output - making it suitable for shared reset bus implementations rather than direct μP reset drive.

Availability

MAX6388XS30D4-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6388XS30D4-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 medical applications, emphasizing low power, high reliability, and small form factors.

The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits with configurable reset thresholds, timeout periods, and dual-supply monitoring - engineered for fail-safe operation in safety-critical embedded systems.

FAQ

What is the exact reset threshold voltage of the MAX6388XS30D4-T?

The MAX6388XS30D4-T has a factory-set nominal reset threshold of 3.00V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This means the actual threshold falls between 2.93V and 3.08V at any temperature within specification, ensuring consistent power-fail detection across harsh environments.

Does the MAX6388XS30D4-T support monitoring of a second voltage rail?

Yes, the MAX6388XS30D4-T supports dual-voltage supervision via its dedicated RESET IN pin. This input compares an externally applied voltage-set by a resistor divider-to an internal 1.27V reference. When either V_CC drops below 3.00V or the RESET IN voltage falls below 1.27V, the device asserts its active-high reset output, making MAX6388XS30D4-T ideal for systems with multiple critical supply rails.

What is the function of the RESET output on the MAX6388XS30D4-T?

The RESET output of the MAX6388XS30D4-T is an active-high push-pull driver that transitions to logic high whenever V_CC or RESET IN falls below their respective thresholds. It remains high for the full 1120ms minimum timeout period after both monitored voltages recover, then returns low to release the microprocessor. This eliminates the need for external pullup resistors and ensures clean, fast reset signaling.

Is the MAX6388XS30D4-T qualified for automotive applications?

Yes, the MAX6388XS30D4-T carries the "/V" automotive qualification suffix and is AEC-Q100 qualified. Its specified operating temperature range of -40°C to +125°C, robust transient immunity, and guaranteed parametric performance under automotive stress conditions make it suitable for body control modules, infotainment power management, and other under-hood or cabin applications requiring automotive-grade reliability.

What package type does the MAX6388XS30D4-T use, and what are its key mechanical attributes?

The MAX6388XS30D4-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. It features gull-wing leads compatible with standard reflow soldering processes, a thermal resistance (θ_JA) of 322.6°C/W on multilayer boards, and RoHS-compliant lead-free construction - enabling high-density placement in space-constrained automotive and industrial PCBs.