Analog Devices Inc./Maxim Integrated MAX6382XR44D3+

Overview

The MAX6382XR44D3+ from Maxim Integrated is a single-supply, active-high push-pull microprocessor supervisory circuit with factory-set 4.38V reset threshold, 140ms minimum reset timeout, and 3µA supply current at +1.8V. It monitors VCC in low-power embedded systems and asserts RESET when voltage drops below threshold, ensuring reliable µP initialization during power-up, brownout, or transient events.

For engineers reviewing the MAX6382XR44D3+ datasheet, MAX6382XR44D3+ pinout, MAX6382XR44D3+ application, or MAX6382XR44D3+ equivalent, key selection factors include its SC70-3 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy over –40°C to +125°C, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Technical Context

The MAX6382XR44D3+ implements a precision bandgap-based reset comparator with 60ppm/°C tempco and internal timing capacitor for fixed 140ms reset timeout. Its active-high push-pull output drives directly into µP reset inputs without external pull-up, and operates across full 1.0V–5.5V VCC range.

Unlike variants with manual reset (MR) or auxiliary RESET IN, the MAX6382XR44D3+ is a minimal-function device: dedicated VCC monitoring only, no MR pin, no secondary voltage input, and no debouncing circuitry - optimized for space-constrained, cost-sensitive applications requiring only primary supply supervision.

Key Specifications

Pinout & Package

MAX6382XR44D3+ uses the 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 microprocessor reset applications.

Compared with MAX809TRD3+T and TPS3808G33DBVR, the MAX6382XR44D3+ delivers tighter threshold accuracy (±2.5% vs ±3%), lower quiescent current (3µA vs 10µA/1.8µA), and true zero-component operation - making it optimal for compact, battery-powered 4.3V–4.4V systems where deterministic 140ms reset hold time is required.

Availability

MAX6382XR44D3+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply and long-term production continuity.

Supply support for MAX6382XR44D3+ 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 was engineered specifically for ultra-low-power microprocessor supervision in space-constrained, battery-operated, and wide-temperature embedded systems - emphasizing accuracy, reliability, and minimal external components.

FAQ

What is the exact reset threshold voltage of the MAX6382XR44D3+?

The MAX6382XR44D3+ has a factory-set nominal reset threshold of 4.38V, 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 "44" corresponds to VTH(nom) = 4.38V. The MAX6382XR44D3+ does not support user adjustment or trimming of this threshold.

Does the MAX6382XR44D3+ include a manual reset input (MR)?

No, the MAX6382XR44D3+ does not feature a manual reset input. Per the Selector Guide and Pin Description sections, only MAX6384/MAX6385/MAX6386/MAX6390 include MR functionality. The MAX6382XR44D3+ is a dedicated VCC-monitoring device with three pins (VCC, RESET, GND) and no provision for external reset initiation - confirming its role as a minimal-footprint, single-function supervisor.

What is the reset timeout period for the MAX6382XR44D3+ and how is it determined?

The MAX6382XR44D3+ provides a fixed minimum reset timeout period of 140ms, as indicated by the "D3" suffix in its part number. This value is factory-programmed using an internal timing capacitor and is not adjustable. The datasheet specifies tRP = 140ms (min), with typical values up to 280ms, ensuring sufficient hold time for microprocessor power stabilization across all operating conditions.

Can the MAX6382XR44D3+ operate reliably at VCC = 1.2V?

Yes, the MAX6382XR44D3+ is fully specified to operate and guarantee correct RESET output logic state down to VCC = 1.0V, per the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.2V, the device continues to monitor voltage, assert RESET when below 4.38V (though physically impossible at that VCC), and maintain valid output drive - enabling robust brownout detection and recovery in ultra-low-voltage systems.

Is the MAX6382XR44D3+ pin-compatible with the MAX809 series?

Yes, the MAX6382XR44D3+ is pin-compatible with the MAX809 series in the SC70-3 package: Pin 1 = VCC, Pin 2 = RESET (active-high), Pin 3 = GND. However, functional differences exist - including reset threshold (4.38V vs 4.63V for MAX809TR), timeout (140ms vs 240ms), and supply current (3µA vs 10µA at 1.8V). System-level validation is required before substitution, despite identical pinout and footprint.