Analog Devices Inc./Maxim Integrated MAX6383XR31D1+T

Overview

MAX6383XR31D1+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.08V reset threshold (±2.5% over -40°C to +125°C), and 1ms minimum reset timeout period. It monitors VCC from +1.8V to +5.5V while consuming only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered embedded controllers for reliable power-up sequencing.

For engineers reviewing the MAX6383XR31D1+T datasheet, MAX6383XR31D1+T pinout, MAX6383XR31D1+T application, or MAX6383XR31D1+T equivalent, key selection criteria include its 3-pin SC70 package, open-drain output 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 MAX6383XR31D1+T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 3.08V threshold, with internal timer ensuring minimum 1ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup resistor and remains valid down to VCC = 1V, enabling robust reset signaling in low-voltage brownout conditions.

No manual reset (MR) input or auxiliary RESET IN functionality is integrated - this variant is optimized for single-supply monitoring with minimal pin count and ultra-low quiescent current (3μA at 1.8V), targeting space-constrained portable systems where deterministic reset timing and supply independence are critical.

Key Specifications

Pinout & Package

MAX6383XR31D1+T is housed in a RoHS-compliant 3-pin SC70 package (outline 21-0075, land pattern 90-0208), featuring a compact 1.25mm × 0.85mm body and 0.65mm lead pitch. This ultra-small outline eliminates need for manual reset or auxiliary inputs, optimizing board area in size-sensitive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR31D1+T and TPS3123E18DBVR, MAX6383XR31D1+T uniquely balances 3.08V precision threshold, 1ms fast recovery, open-drain flexibility, and 3μA ultra-low ICC - making it optimal for 3.3V portable systems needing minimal footprint and bus-compatible reset signaling.

Availability

MAX6383XR31D1+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered industrial loggers, wearable fitness trackers, and smart meter communication modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383XR31D1+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 and mixed-signal ICs for power, sensing, and connectivity in demanding industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers low-power, temperature-stable μP reset supervision for battery-critical and space-constrained systems - with MAX6383XR31D1+T specifically targeting 3.08V rail monitoring in 3-pin SC70 form factor.

FAQ

What is the exact reset threshold voltage of MAX6383XR31D1+T and how stable is it over temperature?

The MAX6383XR31D1+T has a factory-set nominal reset threshold of 3.08V, with guaranteed accuracy 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 validated by production testing per Maxim's datasheet specifications - ensuring reliable reset behavior in automotive and industrial environments where supply rails fluctuate with temperature.

Does MAX6383XR31D1+T include a manual reset (MR) input or auxiliary voltage monitor?

No, MAX6383XR31D1+T does not include a manual reset (MR) input or auxiliary RESET IN pin. It is a dedicated single-supply supervisor with only VCC, GND, and open-drain RESET terminals. This distinguishes it from variants like MAX6384 or MAX6387, which add MR or RESET IN functionality - confirming MAX6383XR31D1+T's role as a minimalist, pin-optimized solution for fixed-threshold monitoring.

What is the minimum reset timeout period for MAX6383XR31D1+T and how is it implemented?

The MAX6383XR31D1+T provides a minimum reset timeout period of 1ms, defined as the guaranteed duration RESET remains asserted after VCC rises above the 3.08V threshold. This timing is generated by an internal RC oscillator and is specified with no load condition per the datasheet - ensuring predictable μP initialization timing without external components or software intervention.

Can MAX6383XR31D1+T operate reliably at VCC = 1.0V, and what happens to the RESET output below that?

Yes, MAX6383XR31D1+T guarantees correct RESET output logic state down to VCC = 1.0V. Below 1.0V, the internal circuitry cannot maintain defined behavior - the RESET pin transitions to high-impedance (due to open-drain structure) and no longer actively drives the bus. System designers must ensure VCC does not fall below 1.0V during normal operation to preserve reset integrity.

What package type and dimensions does MAX6383XR31D1+T use, and is it RoHS-compliant?

MAX6383XR31D1+T uses a 3-pin SC70 package (outline 21-0075) measuring 1.25mm × 0.85mm with 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant per Maxim's ordering nomenclature. This ultra-compact, surface-mount package supports automated assembly and meets IPC-7351B land pattern standard 90-0208.