Analog Devices Inc./Maxim Integrated MAX6382XR29D3+

Overview

MAX6382XR29D3+ from Maxim Integrated is a single-supply, active-high push-pull microprocessor supervisory circuit with factory-set 2.93V reset threshold and 140ms minimum reset timeout. It monitors VCC from +1.8V to +5.0V, consumes only 3µA at +1.8V, guarantees valid reset output down to VCC = 1V, and operates across –40°C to +125°C for use in battery-powered industrial controllers.

For engineers reviewing the MAX6382XR29D3+ datasheet, MAX6382XR29D3+ pinout, MAX6382XR29D3+ application, or MAX6382XR29D3+ equivalent, key selection considerations include its fixed 2.93V threshold accuracy (±2.5% over temperature), SC70-3 package footprint, active-high push-pull output drive capability, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Technical Context

The MAX6382XR29D3+ integrates a precision voltage comparator referenced to an internal bandgap, a temperature-compensated reset timer with 140ms nominal delay, and a push-pull output stage that actively drives high during reset assertion. Its reset logic asserts when VCC falls below 2.93V and holds for ≥140ms after VCC rises above threshold.

No manual reset (MR) or auxiliary RESET IN inputs are present - this variant is a dedicated single-voltage monitor with fixed timing and threshold. The device uses BiCMOS process technology and contains 647 transistors, optimized for low quiescent current and stable operation across automotive-grade temperature range.

Key Specifications

Pinout & Package

MAX6382XR29D3+ is housed in a 3-pin SC70-3 package (package code X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6382XR29D3+, MAX6326TRD3+T offers identical electrical specs but larger SOT23-3 packaging and higher supply current, while TPS3808G33DBVR delivers lower ICC and tighter threshold tolerance but mandates external biasing and longer timeout - both require schematic and layout review before substitution.

Availability

MAX6382XR29D3+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, automotive body control modules, and medical point-of-care monitors requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6382XR29D3+ 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 industrial, automotive, and computing applications, with emphasis on power management, sensing, and interface solutions.

The MAX6381–MAX6390 family was developed specifically for low-power, high-accuracy microprocessor supervision in space-constrained and thermally demanding environments - delivering guaranteed reset behavior across voltage, temperature, and transient conditions.

FAQ

What is the exact reset threshold voltage of MAX6382XR29D3+ and how tightly is it specified?

The MAX6382XR29D3+ has a factory-set reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This specification is confirmed in the Electrical Characteristics table under "VCC Reset Threshold" and applies directly to the MAX6382XR29D3+ variant, not just the broader MAX6382 family. The threshold is trimmed during production and does not require external calibration.

Does MAX6382XR29D3+ include a manual reset input (MR) or auxiliary RESET IN pin?

No, MAX6382XR29D3+ does not include MR or RESET IN functionality. Per the Selector Guide and Pin Description tables, only MAX6384–MAX6390 variants feature MR, and only MAX6387–MAX6389 include RESET IN. The MAX6382XR29D3+ is a minimal three-pin device (VCC, GND, RESET) with fixed single-rail supervision - confirmed by its SC70-3 pinout and absence of MR/RESET IN pins in all configuration diagrams.

What is the reset output structure of MAX6382XR29D3+ and what are its drive capabilities?

MAX6382XR29D3+ features an active-high push-pull reset output. As specified in the Electrical Characteristics table, VOH is ≥0.8×VCC (with ISOURCE = 150µA at VCC ≥1.8V), and VOL is ≤0.3V (with ISINK = 80µA at VCC ≥1.0V). This eliminates the need for an external pull-up resistor and allows direct connection to µP reset inputs requiring active-high assertion, unlike open-drain alternatives.

Can MAX6382XR29D3+ operate reliably at VCC = 1.0V, and what happens to the reset output below that?

Yes, MAX6382XR29D3+ guarantees correct reset output logic state down to VCC = 1.0V, as explicitly stated in the Absolute Maximum Ratings and Detailed Description sections. Below 1.0V, the device is outside its specified operating range; the reset output is not characterized, and proper reset assertion cannot be assured. System designers must ensure VCC remains ≥1.0V during reset assertion for guaranteed behavior.

What package type and dimensions does MAX6382XR29D3+ use, and is it RoHS compliant?

MAX6382XR29D3+ uses the SC70-3 package (package code X3-2), with nominal dimensions of 2.0mm × 2.1mm × 0.95mm and gull-wing leads. The "+" suffix in the part number denotes a lead-free, RoHS-compliant construction, as confirmed in the Ordering Information section and Package Information notes. Footprint and soldering profiles follow JEDEC MO-203-AB standards.