Analog Devices Inc./Maxim Integrated MAX6384XS28D2

Overview

The MAX6384XS28D2 from Maxim Integrated is a low-power microprocessor supervisory circuit with active-low push-pull reset output, factory-set 2.80V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and debounced manual reset input (MR) featuring internal 63kΩ pullup. It monitors single supply voltage in space-constrained portable electronics and industrial controllers.

For engineers reviewing the MAX6384XS28D2 datasheet, MAX6384XS28D2 pinout, MAX6384XS28D2 application, or MAX6384XS28D2 equivalent, this page delivers verified electrical parameters, SC70-4 package mapping, MR timing behavior, VCC reset assertion validity down to 1V, and direct alternatives for brownout detection in battery-powered µP systems.

Technical Context

This device implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and integrates a monostable timer for guaranteed 20ms reset assertion after VCC recovery. Its MR input accepts TTL/CMOS logic and drives reset low for ≥200ns after MR release.

The push-pull RESET output guarantees valid logic state at VCC ≥ 1.0V, sinks ≥1.2mA at VCC ≥ 2.5V (VOL ≤ 0.3V), and sources ≥500µA (VOH ≥ 0.8×VCC). Negative-going VCC transients <35µs (at 100mV overdrive) are rejected without false triggering.

Key Specifications

Pinout & Package

MAX6384XS28D2 uses a 4-pin SC70 package (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm with gull-wing leads. Pin 1 is marked by a dot; pin 4 is GND, providing low-inductance return path for reset signaling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6384XS28D2, MAX6326LTRD2+T saves board space but removes field-service reset capability, while TPS3808G18DBVR adds watchdog functionality at the cost of 2.7× higher supply current and larger SOT-23-5 footprint - making MAX6384XS28D2 optimal for MR-requiring, ultra-low-power, space-constrained designs.

Availability

MAX6384XS28D2 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 across extended temperature ranges and long production lifecycles.

Supply support for MAX6384XS28D2 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, with expertise in low-power supervisory circuits and high-reliability packaging.

MAX6384XS28D2 belongs to the MAX6381–MAX6390 family of single-supply µP reset supervisors engineered for battery-powered and thermally harsh environments where guaranteed reset assertion, minimal current draw, and compact packaging are critical.

FAQ

What is the exact reset threshold voltage and tolerance for MAX6384XS28D2?

The MAX6384XS28D2 has a factory-set nominal reset threshold of 2.80V, with ±2.5% accuracy guaranteed over the full operating temperature range of -40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "28" corresponds to VTH(nom) = 2.80V, VTH(min) = 2.73V, and VTH(max) = 2.87V.

Does MAX6384XS28D2 support manual reset, and how is it implemented?

Yes, MAX6384XS28D2 features a debounced manual reset input (MR) on pin 3. It includes an internal 63kΩ pullup resistor to VCC, so the pin remains inactive when left open. Driving MR low (to <0.3×VCC) asserts the active-low RESET output for the full 20ms timeout period, even if MR is released earlier - ensuring robust reset initiation in noisy environments.

What package type and dimensions does MAX6384XS28D2 use?

MAX6384XS28D2 is packaged in a 4-pin SC70 (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm with gull-wing leads. The pinout is VCC (pin 1), RESET (pin 2), MR (pin 3), and GND (pin 4). This matches the mechanical drawing 21-0098 and is distinct from the 3-pin SC70 used by MAX6381/MAX6382 variants.

Can MAX6384XS28D2 operate reliably at very low supply voltages?

Yes, MAX6384XS28D2 guarantees valid RESET output logic states down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Its push-pull output maintains VOL ≤ 0.3V (at ISINK = 1.2mA, VCC ≥ 2.5V) and VOH ≥ 0.8×VCC (at ISOURCE = 500µA), ensuring interoperability with µPs having low-voltage I/O thresholds.

How does MAX6384XS28D2 handle fast VCC transients, and what is its immunity level?

MAX6384XS28D2 provides negative-going VCC transient immunity up to 35µs duration when the overdrive (VTH – VCC) is 100mV, as shown in Figure 7 of the datasheet. This built-in filtering rejects common switching noise and load-dump spikes without requiring external RC networks, enhancing reliability in electrically noisy automotive or industrial settings.