Analog Devices Inc./Maxim Integrated MAX6383XR23D3

Overview

MAX6383XR23D3 from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.31V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and 3µA supply current at +1.8V. It monitors single-supply VCC in portable battery-powered equipment and embedded controllers requiring reliable power-on reset under brownout conditions.

For engineers reviewing the MAX6383XR23D3 datasheet, MAX6383XR23D3 pinout, MAX6383XR23D3 application, or MAX6383XR23D3 equivalent, key selection criteria include its open-drain reset architecture, guaranteed valid output down to VCC = 1V, ±2.5% threshold accuracy over temperature, and SC70-3 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX6383XR23D3 implements a precision bandgap-based voltage comparator with internal 1.27V reference for threshold detection, paired with a temperature-stable RC timer for the 140ms reset timeout. Its open-drain RESET output requires an external pullup resistor and asserts low when VCC falls below 2.31V, remaining asserted for ≥140ms after VCC recovers.

No manual reset (MR) input or auxiliary RESET IN is present-this variant is optimized for simple single-rail monitoring without user-initiated reset or dual-voltage supervision. It guarantees correct logic state down to VCC = 1V and exhibits negative-going VCC transient immunity up to 35µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6383XR23D3 is housed in a 3-pin SC70-3 package (package code X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with lead-free RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR23D3 and TPS3808G12DBVR, the MAX6383XR23D3 offers optimal balance of open-drain flexibility, industry-standard SC70-3 footprint, and proven transient immunity-making it preferred for multi-supervisor systems and compact industrial designs where reset bus sharing is required.

Availability

MAX6383XR23D3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for MAX6383XR23D3 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.

The MAX6381–MAX6390 family delivers low-power, high-accuracy µP supervisory circuits targeting space- and power-constrained embedded systems needing reliable reset functionality across extended temperature ranges.

FAQ

What is the exact reset threshold voltage of the MAX6383XR23D3?

The MAX6383XR23D3 has a factory-set nominal reset threshold of 2.31V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed by the "23" suffix in the part number and specified in the Reset Thresholds table of the datasheet.

Does the MAX6383XR23D3 include a manual reset input (MR)?

No, the MAX6383XR23D3 does not feature a manual reset input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which lacks MR functionality. Only MAX6384–MAX6386 and MAX6390 variants include MR; this omission simplifies design for applications requiring only power-supply monitoring.

What package type and dimensions does the MAX6383XR23D3 use?

The MAX6383XR23D3 uses the 3-pin SC70-3 package (package code X3-2), with outline dimensions of 2.0mm × 2.1mm × 0.95mm. It is RoHS-compliant and lead-free, matching industry-standard SC70 footprints for drop-in compatibility with existing assembly processes.

How does the open-drain output of the MAX6383XR23D3 affect system design?

The MAX6383XR23D3's open-drain RESET output requires an external pullup resistor to the host supply rail (e.g., 3.3V or 5V). This enables wired-OR connection with other open-drain reset sources on a shared reset bus, supporting multi-supervisor architectures without logic contention-unlike push-pull outputs found in alternatives like MAX6326XR23D3.

Is the MAX6383XR23D3 suitable for operation down to 1.0V VCC?

Yes, the MAX6383XR23D3 guarantees correct RESET output logic state down to VCC = 1.0V, as explicitly stated in the Electrical Characteristics table. This ensures deterministic reset behavior during severe brownout conditions where other supervisors may fail to assert or deassert reliably.