Analog Devices Inc./Maxim Integrated MAX6382XR46D3

Overview

MAX6382XR46D3 from Maxim Integrated is a single-supply, active-high push-pull microprocessor supervisory circuit with factory-set 4.63V reset threshold and 140ms minimum reset timeout. It monitors VCC from +1.8V to +5.5V, consumes only 3µA at +1.8V, guarantees valid reset output down to VCC = 1V, and is used in portable battery-powered equipment for reliable power-on reset sequencing.

For engineers reviewing the MAX6382XR46D3 datasheet, MAX6382XR46D3 pinout, MAX6382XR46D3 application, or MAX6382XR46D3 equivalent, key selection criteria include its precise 4.63V ±2.5% threshold over –40°C to +125°C, SC70-3 package compatibility, active-high push-pull output drive capability, and immunity to negative-going VCC transients up to 140µs at 100mV overdrive.

Technical Context

The MAX6382XR46D3 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer generating a guaranteed-minimum 140ms reset assertion period after VCC recovery. Its active-high push-pull output drives directly into µP reset inputs without external pull-up components.

This device operates as a standalone VCC monitor only (no auxiliary RESET IN or manual reset input), supports supply voltages from 1.0V to 5.5V, and maintains correct logic state on RESET even as VCC drops to 1V - enabling robust brownout detection in low-voltage embedded systems.

Key Specifications

Pinout & Package

MAX6382XR46D3 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. Pin 1 = VCC, Pin 2 = RESET (active-high push-pull), Pin 3 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR46D3, MAX6382XR46D3 delivers 40% lower supply current and guaranteed operation down to VCC = 1V - critical for energy-harvesting and long-life battery applications. Versus TPS3808G33DBVR, it offers exact 4.63V threshold alignment and SC70-3 footprint compatibility, eliminating layout changes in existing 5V µP designs.

Availability

MAX6382XR46D3 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial PLC I/O modules, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX6382XR46D3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The MAX6381–MAX6390 family was designed specifically for low-power, precision voltage monitoring in space-constrained embedded systems - delivering factory-trimmed thresholds, nanoscale packaging, and guaranteed operation across extended temperature ranges.

FAQ

What is the exact reset threshold voltage of MAX6382XR46D3?

The MAX6382XR46D3 has a factory-set nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "46" corresponds to VTH(nom) = 4.63V, VTH(min) = 4.51V, and VTH(max) = 4.74V. The MAX6382XR46D3 uses this fixed threshold to monitor VCC without external components.

Does MAX6382XR46D3 support manual reset functionality?

No, the MAX6382XR46D3 does not include a manual reset (MR) input. Per the Selector Guide and Pin Description sections, only MAX6384/MAX6385/MAX6386/MAX6390 variants feature MR. The MAX6382XR46D3 is a dedicated VCC monitor with no auxiliary inputs - its pinout consists solely of VCC, RESET, and GND. This simplifies design for applications requiring only automatic power-on/brownout reset.

What package type and dimensions does MAX6382XR46D3 use?

The MAX6382XR46D3 is supplied in a 3-pin SC70-3 package (package code X3-2), with overall dimensions of 2.0mm × 2.1mm × 0.95mm and gull-wing surface-mount leads. This compact footprint is documented in Package Information section 21-0075 and matches the top-view pinout: Pin 1 = VCC, Pin 2 = RESET, Pin 3 = GND. The SC70-3 package enables high-density placement in portable and wearable electronics.

Can MAX6382XR46D3 operate with supply voltages below 1.8V?

Yes, the MAX6382XR46D3 operates from VCC = 1.0V to 5.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. While supply current is characterized at 1.8V (3µA), the device guarantees valid reset output down to VCC = 1V - meaning RESET remains correctly asserted or deasserted even during deep brownout. This capability is explicitly verified and not extrapolated.

Is MAX6382XR46D3 pin-compatible with other devices in the MAX6381–MAX6390 family?

The MAX6382XR46D3 shares the same 3-pin SC70-3 pinout (VCC–RESET–GND) with MAX6381XRxxDx and MAX6383XRxxDx variants, making it mechanically and electrically pin-compatible within that subgroup. However, it is not compatible with 4-pin SC70 or 6-pin µDFN variants (e.g., MAX6384–MAX6390), which add MR or RESET IN pins. Always verify pin function mapping using the Pin Description table before substitution.