Analog Devices Inc./Maxim Integrated MAX6383XR29D2-T

Overview

MAX6383XR29D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and guaranteed valid operation down to VCC = 1.0V. It monitors single supply rails in battery-powered or space-constrained embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6383XR29D2-T datasheet, MAX6383XR29D2-T pinout, MAX6383XR29D2-T application, or MAX6383XR29D2-T equivalent, key selection criteria include its 3-pin SC70 package, 3μA supply current at 1.8V, ±2.5% threshold accuracy over temperature, open-drain output requiring external pullup, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Technical Context

The MAX6383XR29D2-T implements a precision voltage comparator with internal 2.93V reference and an on-chip timer that asserts reset for ≥20ms after VCC rises above threshold. Its open-drain RESET output requires an external pullup resistor and remains valid down to VCC = 1.0V, enabling robust reset signaling even during deep brownout conditions.

No manual reset input (MR) or auxiliary RESET IN is present - this variant is optimized for simple single-rail monitoring without user-initiated reset or dual-voltage supervision. It belongs to the MAX6381–MAX6390 family sharing BiCMOS process, AEC-Q100-qualified variants, and pin-compatible footprint across select members.

Key Specifications

Pinout & Package

MAX6383XR29D2-T is housed in a RoHS-compliant 3-pin SC70 package (outline 21-0075, land pattern 90-0208), measuring 1.25mm × 0.85mm × 0.95mm with gull-wing leads. Thermal resistance θ_JA = 340.4°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2-T and TPS3808G33DBVR, the MAX6383XR29D2-T uniquely balances ultra-low 3μA supply current, precise 2.93V threshold matching common 3.0V system rails, and open-drain output for flexible reset bus design - making it optimal for space- and power-constrained applications where timing and voltage alignment are critical.

Availability

MAX6383XR29D2-T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, automotive body control modules, and medical diagnostic handhelds requiring stable component supply and long-term production continuity.

Supply support for MAX6383XR29D2-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits targeting compact, battery-sensitive systems needing reliable reset under brownout, cold-crank, or noisy supply conditions.

FAQ

What is the exact reset threshold voltage of the MAX6383XR29D2-T and how stable is it over temperature?

The MAX6383XR29D2-T 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 via laser-trimmed on-chip references and BiCMOS process optimization - ensuring consistent brownout detection in automotive and industrial environments without external calibration.

Does the MAX6383XR29D2-T include a manual reset input (MR) or auxiliary voltage monitor (RESET IN)?

No, the MAX6383XR29D2-T does not include MR or RESET IN functionality. It is a dedicated single-rail supervisor with only VCC monitoring. The "XR" prefix and 3-pin SC70 package confirm this simplified configuration - unlike MAX6384–MAX6390 (4-pin SC70 with MR) or MAX6387–MAX6389 (4-pin SC70 with RESET IN).

What is the minimum VCC voltage at which the MAX6383XR29D2-T guarantees correct reset output logic state?

The MAX6383XR29D2-T guarantees valid reset output logic state down to VCC = 1.0V. Below this, the internal comparator and timer may become indeterminate. This feature ensures deterministic reset behavior during deep brownout events - critical for systems recovering from near-dead-battery conditions or severe supply sag.

Can the MAX6383XR29D2-T be used in AEC-Q100 qualified automotive designs?

Yes - while the standard MAX6383XR29D2-T is not automotive-qualified, Maxim offers /V-grade variants (e.g., MAX6383XR29D2/V+T) that are AEC-Q100 qualified for Grade 1 (-40°C to +125°C). These share identical electrical specs and 3-pin SC70 packaging but undergo additional automotive reliability testing and traceability controls.

What external components are required for proper operation of the MAX6383XR29D2-T?

The MAX6383XR29D2-T requires only one external component: a pullup resistor on the open-drain RESET pin. A 10kΩ to 100kΩ resistor to the monitored VCC rail is typical. No bypass capacitor is mandatory, but a 0.1μF ceramic capacitor placed close to VCC and GND improves immunity to high-frequency transients per Maxim's application guidance.