Analog Devices Inc./Maxim Integrated MAX6388XS16D2-T

Overview

MAX6388XS16D2-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.58V VCC reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and auxiliary RESET IN input for monitoring a second voltage source. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, targeting power-critical embedded systems requiring reliable brownout detection.

For engineers reviewing the MAX6388XS16D2-T datasheet, MAX6388XS16D2-T pinout, MAX6388XS16D2-T application, or MAX6388XS16D2-T equivalent, key selection criteria include its 1.58V reset threshold accuracy, 20ms VCC reset timeout, 4-pin SC70 package footprint, auxiliary voltage monitoring capability, and guaranteed reset validity down to VCC = 1V.

Technical Context

The MAX6388XS16D2-T integrates two independent reset comparators: one monitors VCC against a precision 1.58V internal reference, while the second compares an external voltage applied to the RESET IN pin against a fixed 1.27V internal reference. Reset assertion occurs if either monitored voltage falls below its respective threshold.

It features a push-pull active-high RESET output that transitions high during fault conditions and remains asserted for exactly 20ms after recovery, with no manual reset input - distinguishing it from MAX6384–MAX6386 and MAX6390 variants. Its 4-pin SC70 package omits MR and NC pins present in 6-pin μDFN versions.

Key Specifications

Pinout & Package

MAX6388XS16D2-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 PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6388XS16D2-T, the μDFN variant provides superior thermal dissipation but occupies more PCB area, while TLV809K33DBZR reduces cost and size at the expense of dual-voltage supervision and precise 1.58V threshold accuracy.

Availability

MAX6388XS16D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered medical sensors, automotive body control modules, and low-power edge AI accelerators requiring stable component supply and long-term lifecycle support.

Supply support for MAX6388XS16D2-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and AEC-Q100 qualification.

The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting power-sensitive embedded systems where guaranteed reset behavior across extreme temperatures and supply ranges is mandatory.

FAQ

What is the exact reset threshold voltage of MAX6388XS16D2-T and how stable is it over temperature?

The MAX6388XS16D2-T has a factory-set VCC reset threshold of 1.58V, with ±2.5% accuracy guaranteed over the full -40°C to +125°C operating range. This stability is achieved through laser-trimmed internal references and BiCMOS process design, ensuring consistent brownout detection without external calibration. The MAX6388XS16D2-T maintains this tolerance even under rapid thermal cycling typical in automotive under-hood environments.

Does MAX6388XS16D2-T support monitoring a second voltage, and how is it configured?

Yes, MAX6388XS16D2-T includes a dedicated RESET IN pin that compares an external voltage to a precise 1.27V internal reference. To configure a custom threshold (e.g., 3.3V), connect a resistor divider between the monitored rail and ground, with the midpoint feeding RESET IN. The MAX6388XS16D2-T asserts reset if either VCC drops below 1.58V or the divided voltage falls below 1.27V, enabling dual-rail supervision in compact designs.

What is the function of the RESET output on MAX6388XS16D2-T and what load can it drive?

The RESET output of MAX6388XS16D2-T is an active-high push-pull driver, meaning it actively sources current when asserted (high) and sinks current when deasserted (low). It can source up to 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC, and sink up to 3.2mA while holding VOL ≤ 0.4V. This eliminates external pullup resistors and allows direct connection to standard CMOS reset inputs without signal conditioning.

Is MAX6388XS16D2-T suitable for battery-powered applications with multi-year runtime requirements?

Yes, MAX6388XS16D2-T draws only 3μA at 1.8V and 6μA at 3.6V, making it ideal for long-life battery applications. In a typical coin-cell design (e.g., CR2032, 225mAh), the MAX6388XS16D2-T contributes less than 0.1% of total system current, enabling >10 years of operation when paired with duty-cycled microcontrollers. Its guaranteed operation down to VCC = 1.0V further extends usable battery capacity beyond conventional supervisors.

How does MAX6388XS16D2-T handle short VCC transients, and what protection is recommended?

MAX6388XS16D2-T provides inherent immunity to negative-going VCC transients shorter than values shown in the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph (e.g., ~300µs for 100mV overdrive). For enhanced robustness, place a 0.1µF ceramic capacitor as close as possible to the VCC pin. This reduces high-frequency noise coupling and extends the effective transient rejection window, particularly important in electrically noisy automotive or industrial settings where the MAX6388XS16D2-T is commonly deployed.