Analog Devices Inc./Maxim Integrated MAX6383XR23D3+T

Overview

MAX6383XR23D3+T from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit with factory-set 2.31V reset threshold and 140ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6383XR23D3+T datasheet, MAX6383XR23D3+T pinout, MAX6383XR23D3+T application, or MAX6383XR23D3+T equivalent, key selection criteria include its 2.31V ±2.5% threshold accuracy over –40°C to +125°C, open-drain output requiring external pullup, SC70-3 package footprint, and immunity to negative-going VCC transients up to 100µs at 100mV overdrive.

Technical Context

The MAX6383XR23D3+T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer for deterministic 140ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup resistor and remains asserted during VCC drop below 2.31V or transient glitches exceeding specified overdrive-duration limits.

No manual reset (MR) input or auxiliary RESET IN is included - this variant belongs to the MAX6383 subgroup, which features only VCC monitoring and open-drain active-low reset, distinguishing it from MR-equipped (e.g., MAX6384–MAX6386) or dual-input (e.g., MAX6387–MAX6389) family members.

Key Specifications

Pinout & Package

MAX6383XR23D3+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, suitable for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383XR23D3+T, MAX6326XR23D3+T trades lower power and tighter threshold accuracy for broader commercial temperature support, while TPS3808G125DBVR offers lower ICC but introduces timing uncertainty and layout overhead - making MAX6383XR23D3+T optimal for fixed-timing, low-power, thermally demanding deployments.

Availability

MAX6383XR23D3+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX6383XR23D3+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 single/dual low-voltage, low-power μP reset circuits optimized for space-constrained, battery-sensitive systems where guaranteed reset behavior under brownout and transient conditions is non-negotiable.

FAQ

What is the exact reset threshold voltage of MAX6383XR23D3+T and how stable is it over temperature?

The MAX6383XR23D3+T has a factory-set nominal reset threshold of 2.31V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser-trimmed bandgap references and matched transistor ratios in Maxim's BiCMOS process, ensuring minimal drift across thermal extremes without external calibration.

Does MAX6383XR23D3+T include a manual reset input (MR) pin?

No, MAX6383XR23D3+T does not include a manual reset input. It belongs to the MAX6383 subgroup, which provides only VCC monitoring and open-drain active-low reset output. Models with MR functionality include MAX6384, MAX6385, MAX6386, and MAX6390 - all of which use 4-pin SC70 or 6-pin µDFN packages, unlike the 3-pin SC70 of MAX6383XR23D3+T.

What external components are required for proper operation of MAX6383XR23D3+T?

MAX6383XR23D3+T requires only one external component: a pullup resistor on the RESET pin (Pin 1). A 10kΩ to 100kΩ resistor to the host logic supply (e.g., 3.3V) is typical. No capacitors, dividers, or additional biasing are needed - the device is fully self-contained with factory-trimmed threshold and timeout, simplifying BOM and layout.

Can MAX6383XR23D3+T be used in automotive applications?

MAX6383XR23D3+T is rated for –40°C to +125°C and RoHS-compliant, but it is not AEC-Q100 qualified. For automotive-critical functions, Maxim offers /V suffix variants (e.g., MAX6383XR23D3/V+T) that undergo full AEC-Q100 stress testing and qualification. Always verify qualification status via official Maxim ordering information before deployment in safety-relevant vehicle subsystems.

How does the open-drain output of MAX6383XR23D3+T interface with a microcontroller reset input?

The open-drain RESET output of MAX6383XR23D3+T connects directly to a microcontroller's active-low reset pin, with an external pullup resistor (e.g., 47kΩ to 3.3V). When VCC is valid, RESET floats high (deasserted); when VCC drops below 2.31V, the internal FET pulls RESET low (asserted). This configuration supports voltage translation, shared reset buses, and avoids contention with other open-drain drivers on the same line.