Analog Devices Inc./Maxim Integrated MAX6383XR30D3+

Overview

MAX6383XR30D3+ from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.00V reset threshold (±2.5% over -40°C to +125°C), and 140ms minimum reset timeout period. It monitors VCC from +1.8V to +5.5V while drawing 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 MAX6383XR30D3+ datasheet, MAX6383XR30D3+ pinout, MAX6383XR30D3+ application, or MAX6383XR30D3+ equivalent, key selection considerations include its 3-pin SC70 open-drain configuration, ±2.5% threshold accuracy across automotive temperature range, 140ms timeout timing, and compatibility with dual-voltage monitoring systems requiring auxiliary reset inputs on related variants.

Technical Context

The MAX6383XR30D3+ implements a precision voltage comparator with internal 3.00V reference and hysteresis-free threshold detection. Its open-drain RESET output requires an external pullup resistor and sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V. The device asserts reset when VCC falls below 3.00V and holds it for ≥140ms after VCC rises above threshold.

No manual reset (MR) or auxiliary RESET IN input is present - this variant belongs to the MAX6383 base group (3-pin SC70, open-drain active-low only). It lacks internal pullup resistors or secondary comparators, distinguishing it from MR-equipped MAX6384–MAX6386 or dual-input MAX6387–MAX6389 variants.

Key Specifications

Pinout & Package

MAX6383XR30D3+ is housed in a 3-pin SC70 package (package code X3+2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm. Pin 1 is RESET (open-drain active-low), Pin 2 is VCC, and Pin 3 is GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR30D3+, MAX6383XR30D3+ trades ±0.5% threshold accuracy for broader automotive qualification and legacy design continuity; versus TLV803EB30DBZR, it provides guaranteed operation at +125°C and higher sink drive strength (3.2mA vs. 1.8mA), critical for noisy industrial buses.

Availability

MAX6383XR30D3+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383XR30D3+ 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 communications applications, with emphasis on low-power, high-reliability solutions.

MAX6383XR30D3+ belongs to the MAX6381–MAX6390 family of microprocessor supervisory circuits engineered for robust power-monitoring in space- and power-constrained embedded systems operating across -40°C to +125°C.

FAQ

What is the exact reset threshold voltage of MAX6383XR30D3+ and how accurate is it over temperature?

The MAX6383XR30D3+ has a factory-set nominal reset threshold of 3.00V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. At +25°C, the threshold is specified as 2.93V (min) to 3.08V (max). This tolerance ensures reliable brownout detection without requiring external calibration or trimming components in automotive and industrial applications.

Does MAX6383XR30D3+ include a manual reset input (MR) or auxiliary RESET IN pin?

No, MAX6383XR30D3+ does not include a manual reset input (MR) or auxiliary RESET IN pin. It is a 3-pin SC70 device with only RESET (pin 1), VCC (pin 2), and GND (pin 3). MR functionality is present only in 4-pin SC70 or 6-pin μDFN variants like MAX6384XRxxDx+ or MAX6390XSxxDx+. The MAX6383XR30D3+ is optimized for simplicity and minimal footprint in fixed-threshold, single-rail monitoring applications.

What is the minimum supply voltage at which MAX6383XR30D3+ guarantees correct reset output behavior?

MAX6383XR30D3+ guarantees valid reset output state down to VCC = 1.0V. Below this voltage, the internal comparator and output driver may become indeterminate. This feature ensures deterministic reset assertion during deep brownout events - for example, when a lithium battery discharges to 1.8V then sags further under load - preventing unintended MCU operation before full rail recovery.

Can MAX6383XR30D3+ be used in automotive applications, and what qualifications does it meet?

Yes, MAX6383XR30D3+ is qualified per AEC-Q100 Grade 1 (-40°C to +125°C) when ordered with the /V suffix (e.g., MAX6383XR30D3/V+T). The standard MAX6383XR30D3+ is rated for -40°C to +125°C and RoHS-compliant, but full automotive qualification requires explicit /V ordering. Its ±2.5% threshold stability and negative-going transient immunity make it suitable for body control, telematics, and infotainment power supervision.

What external components are required for proper operation of MAX6383XR30D3+?

MAX6383XR30D3+ requires only an external pullup resistor on the RESET pin (typically 10kΩ to VCC) due to its open-drain output architecture. No capacitors or resistive dividers are needed - the 3.00V threshold is factory-trimmed, and timing is internally generated. A 0.1μF ceramic bypass capacitor between VCC and GND, placed within 2mm of the pins, is strongly recommended to suppress high-frequency noise and improve transient immunity.