Analog Devices Inc./Maxim Integrated MAX6383XR46D2+

Overview

MAX6383XR46D2+ from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit designed to monitor +4.63V supply rails in space-constrained embedded systems. It features ±2.5% reset threshold accuracy over -40°C to +125°C, 20ms minimum reset timeout, and consumes only 3µA at +1.8V - enabling reliable power-up sequencing in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the MAX6383XR46D2+ datasheet, MAX6383XR46D2+ pinout, MAX6383XR46D2+ application, or MAX6383XR46D2+ equivalent, key selection criteria include its factory-set 4.63V reset threshold, SC70-3 open-drain output architecture, guaranteed reset validity down to VCC = 1V, and compatibility with manual reset integration via external pull-up.

Technical Context

The MAX6383XR46D2+ implements a precision bandgap-based voltage comparator with 60ppm/°C tempco to detect VCC drops below its fixed 4.63V threshold. Its internal timer enforces a 20ms minimum reset assertion after VCC recovery, independent of supply ramp rate.

This variant belongs to the MAX6383 subfamily - distinguished by 3-pin SC70 packaging, open-drain active-low RESET output requiring external pull-up, absence of MR or RESET IN pins, and operation across 1.0V–5.5V supply range with guaranteed functionality down to VCC = 1V.

Key Specifications

Pinout & Package

MAX6383XR46D2+ is housed in a 3-pin SC70 package (package code X3-2), measuring 2.0mm × 2.1mm × 0.95mm. This ultra-compact outline supports high-density PCB layouts in wearables and miniaturized edge nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2+T and TPS3808G18DBVR, MAX6383XR46D2+ offers the smallest footprint and native open-drain interface for mixed-voltage systems, though it lacks programmability and push-pull drive strength.

Availability

MAX6383XR46D2+ is available at Aetrix Electronics and suitable for industrial automation, portable medical instrumentation, automotive body electronics, and smart infrastructure requiring stable component supply and long-term manufacturability.

Supply support for MAX6383XR46D2+ 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.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervision in miniature packages - engineered specifically for battery-operated and thermally rugged embedded systems where reliability and size are critical.

FAQ

What is the exact reset threshold voltage of MAX6383XR46D2+ and how stable is it over temperature?

The MAX6383XR46D2+ has a factory-set reset threshold of 4.63V (nominal), with ±2.5% tolerance guaranteed over -40°C to +125°C. Its 60ppm/°C tempco ensures minimal drift across operating temperatures, making MAX6383XR46D2+ suitable for automotive and industrial applications where thermal stability is essential.

Does MAX6383XR46D2+ support manual reset functionality?

No, MAX6383XR46D2+ does not include a manual reset (MR) input. It is a dedicated single-supply monitor with only VCC, GND, and open-drain RESET pins. For manual reset capability, consider MAX6384XR46D2+ or MAX6390XR46D2+, which integrate MR with internal pull-up.

Can MAX6383XR46D2+ operate reliably at VCC = 1.2V?

Yes, MAX6383XR46D2+ guarantees correct reset output logic state down to VCC = 1.0V. At 1.2V, the device remains fully functional - monitoring the supply and asserting reset if VCC falls below 4.63V (though such a condition implies external level-shifting or measurement error, as 4.63V > 1.2V).

What external components are required for proper operation of MAX6383XR46D2+?

MAX6383XR46D2+ requires two external components: a 0.1µF ceramic decoupling capacitor between VCC and GND placed adjacent to the device, and an external pull-up resistor (typically 4.7kΩ–10kΩ) on the RESET pin to the target logic rail (e.g., 3.3V or 5V). No other passive components are needed.

Is MAX6383XR46D2+ pin-compatible with older Maxim reset ICs like MAX809?

No, MAX6383XR46D2+ is not pin-compatible with MAX809 series. While both offer 4.63V thresholds, MAX6383XR46D2+ uses a 3-pin SC70 package with GND/RESET/VCC ordering, whereas MAX809 uses SOT-23-3 with VCC/GND/RESET. Layout redesign is required when substituting MAX6383XR46D2+.