Analog Devices Inc./Maxim Integrated MAX6384XS29D1

Overview

MAX6384XS29D1 from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 2.93V reset threshold, 140ms minimum VCC reset timeout, active-low push-pull reset output, and debounced manual reset input (MR). It monitors +1.8V to +5.0V supply rails in battery-powered embedded systems, ensuring reliable µP initialization during brownout and power-up. Operating down to VCC = 1V with ±2.5% threshold accuracy over –40°C to +125°C, it delivers deterministic reset assertion under voltage fault conditions.

For engineers reviewing the MAX6384XS29D1 datasheet, MAX6384XS29D1 pinout, MAX6384XS29D1 application, or MAX6384XS29D1 equivalent, key selection criteria include its 2.93V reset threshold tolerance, MR input with internal 63kΩ pullup, 140ms VCC reset timeout, guaranteed reset validity at VCC ≥ 1V, and SC70-4 package compatibility with space-constrained portable designs.

Technical Context

The MAX6384XS29D1 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.93V threshold; reset asserts when VCC falls below this level and remains asserted for ≥140ms after VCC recovers. Its MR input features internal 63kΩ pullup and 1µs minimum pulse width support, enabling robust manual reset initiation without external components.

Reset output uses push-pull active-low logic with VOL ≤ 0.3V at ISINK = 80µA (VCC ≥ 1.0V), ensuring clean TTL/CMOS-compatible signaling. The device achieves 3µA supply current at +1.8V and maintains ±2.5% threshold accuracy across full industrial temperature range, making it suitable for low-voltage, high-reliability power monitoring.

Key Specifications

Pinout & Package

MAX6384XS29D1 is housed in a lead-free 4-pin SC70 package (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm with gull-wing leads. This compact outline supports high-density routing in portable and wearable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR29D3+, MAX6384XS29D1 adds MR functionality and push-pull output for simplified design; versus TPS3808G33DBVR, it offers tighter timeout matching and smaller package-critical for space-constrained portable electronics.

Availability

MAX6384XS29D1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX6384XS29D1 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 power management, sensing, and interface applications in industrial, automotive, and computing markets.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for battery-operated and space-constrained embedded systems requiring high-accuracy voltage monitoring and deterministic reset behavior.

FAQ

What is the exact reset threshold voltage of MAX6384XS29D1 and how stable is it over temperature?

The MAX6384XS29D1 has a factory-set nominal reset threshold of 2.93V, with guaranteed tolerance of ±2.5% across the full operating temperature range of –40°C to +125°C. This stability is achieved through laser-trimmed bandgap references and matched comparator design, eliminating need for external calibration. At +25°C, typical threshold is 2.93V with ±1.5% variation, tightening system-level voltage margining for 3.0V/3.3V rails.

Does MAX6384XS29D1 support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6384XS29D1 includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, drive MR below 0.3×VCC (e.g., <0.9V at 3.0V VCC) for ≥1µs. The pin rejects glitches <100ns and exhibits 200ns propagation delay from MR low-to-RESET low. Leaving MR unconnected defaults to high via internal pullup, disabling manual reset function.

What is the reset timeout period for MAX6384XS29D1, and is it guaranteed minimum or typical?

The MAX6384XS29D1 provides a guaranteed minimum VCC reset timeout of 140ms after VCC rises above the 2.93V threshold. This is not a typical value-it is production-tested and specified across temperature and process corners. The actual timeout may extend up to 280ms under worst-case conditions, ensuring µP remains held in reset well beyond typical power-supply stabilization times for LDOs and DC-DC converters.

Can MAX6384XS29D1 operate reliably at very low supply voltages, and what is the lowest functional VCC?

Yes, MAX6384XS29D1 guarantees correct reset output logic state down to VCC = 1.0V, enabling robust operation during deep brownout conditions. Below 1.0V, the internal regulator and comparator cease functioning, but the device remains non-destructive up to 0V. For applications requiring valid reset signaling all the way to 0V, external pulldown resistors on the push-pull RESET output are recommended per Maxim Application Note 4312.

What package type and dimensions does MAX6384XS29D1 use, and is it RoHS-compliant?

MAX6384XS29D1 is supplied in a lead-free 4-pin SC70 package (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm with 0.65mm pitch gull-wing leads. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH. The small outline supports high-density routing in wearables and compact IoT edge nodes.