Analog Devices Inc./Maxim Integrated MAX6383XR32D2+T

Overview

MAX6383XR32D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.20V reset threshold (±2.5% over -40°C to +125°C), and 20ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V while consuming only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered instrumentation and embedded controllers requiring reliable power-on reset.

For engineers reviewing the MAX6383XR32D2+T datasheet, MAX6383XR32D2+T pinout, MAX6383XR32D2+T application, or MAX6383XR32D2+T equivalent, key selection considerations include its 3-pin SC70 package, open-drain reset architecture requiring external pullup, ±2.5% threshold accuracy over temperature, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Technical Context

The MAX6383XR32D2+T implements a precision voltage comparator with internal 3.20V reference and an independent monostable 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 = 1V, enabling robust reset signaling even during brownout recovery.

No manual reset input (MR) or auxiliary RESET IN is present - this variant is optimized for single-supply monitoring with minimal external components. The device uses BiCMOS process technology and operates across -40°C to +125°C, meeting AEC-Q100 requirements when ordered with /V suffix.

Key Specifications

Pinout & Package

MAX6383XR32D2+T is housed in a RoHS-compliant 3-pin SC70 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm. This ultra-compact footprint supports high-density PCB layouts in space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2+T and TPS3808G33DBVR, MAX6383XR32D2+T uniquely balances 20ms precision timing, 3.20V threshold accuracy, open-drain flexibility, and AEC-Q100 readiness - making it optimal for compact, battery-sensitive, and automotive-grade reset supervision where short, deterministic reset pulses are critical.

Availability

MAX6383XR32D2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383XR32D2+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 industrial, automotive, communications, and computing applications.

The MAX6381–MAX6390 family delivers low-power, high-accuracy μP reset supervision for systems demanding guaranteed reset behavior across wide voltage and temperature ranges - especially where board space, battery life, and reliability are critical.

FAQ

What is the exact reset threshold voltage of MAX6383XR32D2+T and how stable is it over temperature?

The MAX6383XR32D2+T has a factory-set nominal reset threshold of 3.20V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed internal references and BiCMOS process design, ensuring no external calibration is needed. The MAX6383XR32D2+T maintains this accuracy without drift, making it suitable for automotive and industrial applications where thermal variation could otherwise cause unreliable reset behavior.

Does MAX6383XR32D2+T include a manual reset input (MR) or auxiliary voltage monitor (RESET IN)?

No, MAX6383XR32D2+T does not include a manual reset input (MR) or auxiliary RESET IN pin. It is a dedicated single-supply supervisor with only three terminals: RESET (open-drain), VCC, and GND. This simplifies layout and reduces BOM count for applications requiring only basic VCC monitoring. Other variants like MAX6384XR32D2+T add MR, and MAX6387XR32D2+T adds RESET IN - but those are distinct part numbers with different pinouts and functionality.

What is the minimum VCC voltage at which MAX6383XR32D2+T guarantees correct reset output logic state?

The MAX6383XR32D2+T guarantees valid reset output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry may not operate reliably, but the open-drain RESET output remains in a high-impedance state (not actively driven), allowing external pullup to maintain defined logic levels. This feature ensures deterministic microcontroller behavior during brownout recovery and is explicitly verified per the device's Absolute Maximum Ratings and Electrical Characteristics tables in the official datasheet.

Can MAX6383XR32D2+T be used in a wired-OR reset bus configuration with other supervisors?

Yes, MAX6383XR32D2+T is specifically designed for wired-OR reset bus use due to its open-drain active-low RESET output. When multiple MAX6383XR32D2+T or compatible open-drain supervisors share a common reset line with a single pullup resistor, any device asserting reset (pulling low) will hold the entire bus in reset - enabling coordinated system-level reset across distributed power domains. This architecture is widely deployed in multi-rail systems such as FPGAs with separate core/I/O supplies.

Is MAX6383XR32D2+T qualified for automotive applications?

The base MAX6383XR32D2+T is RoHS-compliant and specified for -40°C to +125°C operation, but it is not automatically AEC-Q100 qualified. Automotive qualification requires the /V suffix (e.g., MAX6383XR32D2/V+T), which denotes additional stress testing and lot traceability per AEC-Q100 standards. Always verify ordering code suffixes and consult Maxim's official ordering information table to confirm automotive qualification status for your specific production requirement.