Analog Devices Inc./Maxim Integrated MAX6382XR40D3+

Overview

MAX6382XR40D3+ from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.00V reset threshold, 140ms minimum reset timeout, and guaranteed operation down to VCC = 1.0V. It monitors single supply voltage in low-power embedded systems, asserts RESET high during brownout or power-up, and consumes only 3μA at +1.8V. Designed for space-constrained applications requiring precise voltage supervision and deterministic reset timing.

For engineers reviewing the MAX6382XR40D3+ datasheet, MAX6382XR40D3+ pinout, MAX6382XR40D3+ application, or MAX6382XR40D3+ equivalent, key selection criteria include its active-high push-pull output logic, ±2.5% reset threshold accuracy over –40°C to +125°C, SC70-3 package footprint, and compatibility with 1.8V–5.5V supply rails in battery-powered and industrial control systems.

Technical Context

The MAX6382XR40D3+ implements a precision bandgap-based voltage comparator with internal 4.00V threshold reference and a monolithic timer for fixed 140ms reset assertion after VCC recovery. Its push-pull output drives high during reset, eliminating need for external pullup resistors.

It operates across full industrial temperature range (–40°C to +125°C) with ±2.5% threshold tolerance and 60ppm/°C tempco, ensuring stable reset behavior under thermal stress. The device guarantees valid RESET state down to VCC = 1.0V, enabling reliable supervision even during deep brownout conditions.

Key Specifications

Pinout & Package

MAX6382XR40D3+ is housed in a 3-pin SC70 package (package code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, with 0.65mm lead pitch and RoHS-compliant matte-tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6382XR40D3+, the /V+ variant adds automotive qualification without altering timing or electrical behavior, while TLV803EB40DBZR requires board-level redesign due to output polarity and drive architecture differences - making MAX6382XR40D3+ optimal for new designs needing active-high push-pull reset with minimal footprint and ultra-low ICC.

Availability

MAX6382XR40D3+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensor nodes, automotive body control units, smart energy meter MCU subsystems, and portable/battery-powered equipment requiring stable component supply and long-term lifecycle support.

Supply support for MAX6382XR40D3+ 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, communications, and computing markets, with emphasis on power efficiency, small size, and high reliability.

The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits optimized for space-constrained, battery-sensitive applications requiring accurate reset thresholds and ultra-low quiescent current across extended temperature ranges.

FAQ

What is the exact reset threshold voltage of MAX6382XR40D3+ and how tightly is it specified?

The MAX6382XR40D3+ has a factory-set nominal reset threshold of 4.00V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. At +25°C, the threshold is specified as 3.90V (min) to 4.10V (max), and the tempco is 60ppm/°C. This precision eliminates need for external trimming components in most applications.

Does MAX6382XR40D3+ support manual reset functionality?

No, MAX6382XR40D3+ does not include a manual reset (MR) input. It belongs to the MAX6382 subgroup, which features only VCC monitoring and active-high push-pull RESET output. Manual reset capability is present only in MAX6384/MAX6385/MAX6386/MAX6390 variants - confirmed by the Pin Description table and Selector Guide in the datasheet.

Can MAX6382XR40D3+ operate reliably at VCC = 1.2V, and what happens to the RESET output below that?

Yes, MAX6382XR40D3+ guarantees valid RESET output logic states down to VCC = 1.0V. At 1.2V, RESET functions fully - asserting high during undervoltage and deasserting cleanly upon recovery. Below 1.0V, the internal regulator and comparator cease operation, and RESET state is no longer guaranteed; however, the device remains undamaged per absolute maximum ratings (VCC down to –0.3V).

What is the maximum sink current capability of the RESET output in MAX6382XR40D3+?

The RESET output of MAX6382XR40D3+ can sink up to 3.2mA while maintaining VOL ≤ 0.4V at VCC ≥ 4.5V, 1.2mA at VCC ≥ 2.5V (VOL ≤ 0.3V), and 80μA at VCC ≥ 1.0V (VOL ≤ 0.3V). These values are specified in the Electrical Characteristics table under "Push-Pull RESET Output Voltage" and define the maximum load the output can drive while staying within logic-valid voltage margins.

Is MAX6382XR40D3+ pin-compatible with legacy Maxim reset ICs like MAX809?

Yes, MAX6382XR40D3+ is explicitly listed in the datasheet as pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series. All share identical 3-pin SC70 pinout (VCC, GND, RESET), enabling drop-in replacement in existing layouts without PCB modification - provided the active-high output logic matches the host system's reset architecture.