Analog Devices Inc./Maxim Integrated MAX6383XR29D1+T

Overview

MAX6383XR29D1+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.93V reset threshold (±2.5% over –40°C to +125°C), 1ms minimum reset timeout, and 3μA supply current at +1.8V. It monitors single V_CC supply in battery-powered or space-constrained embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6383XR29D1+T datasheet, MAX6383XR29D1+T pinout, MAX6383XR29D1+T application, or MAX6383XR29D1+T equivalent, key selection factors include its 3-pin SC70 package, guaranteed reset validity down to V_CC = 1V, immunity to negative-going V_CC transients, and compatibility with systems needing minimal quiescent current and precise voltage monitoring.

Technical Context

The MAX6383XR29D1+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 1ms minimum reset assertion period after V_CC recovers above 2.93V.

As an open-drain device, it requires an external pullup resistor on the RESET pin and guarantees valid logic state down to V_CC = 1V. It lacks manual reset (MR) and auxiliary RESET IN inputs-features reserved for other family members like MAX6384 or MAX6387.

Key Specifications

Pinout & Package

MAX6383XR29D1+T is housed in a RoHS-compliant 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with 0.65mm pitch and thermal resistance θ_JA = 340.4°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD1+T, MAX6383XR29D1+T reduces supply current by 75% at 1.8V while enabling voltage-level translation; versus TPS3808G12DBVR, it trades enable functionality for smaller footprint and simpler routing in cost-sensitive, static-reset applications.

Availability

MAX6383XR29D1+T is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smart meter battery backup, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for MAX6383XR29D1+T 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 power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions.

The MAX6381–MAX6390 family targets space- and energy-constrained embedded systems requiring dependable power-supply monitoring and reset generation with minimal overhead.

FAQ

What is the exact reset threshold voltage of MAX6383XR29D1+T and how stable is it over temperature?

The MAX6383XR29D1+T has a factory-set nominal reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts no more than ±0.007V across the entire range - sufficient for robust brownout detection in automotive and industrial environments where MAX6383XR29D1+T is commonly deployed.

Does MAX6383XR29D1+T support manual reset (MR) input functionality?

No, MAX6383XR29D1+T does not include a manual reset (MR) input. MR is only present on specific variants within the MAX6381–MAX6390 family, such as MAX6384, MAX6385, MAX6386, and MAX6390. The MAX6383XR29D1+T is a dedicated single-supply monitor with open-drain reset output and no MR or auxiliary RESET IN pins - confirmed by its 3-pin SC70 pinout and functional description in the datasheet.

What package type and dimensions does MAX6383XR29D1+T use, and is it RoHS-compliant?

MAX6383XR29D1+T uses a 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), measuring 1.25mm × 0.8mm with 0.65mm pin pitch. The "+T" suffix explicitly denotes lead(Pb)-free and RoHS-compliant construction per Maxim Integrated's ordering nomenclature, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.

Can MAX6383XR29D1+T operate reliably at V_CC levels below 1.8V?

Yes, MAX6383XR29D1+T is fully specified to operate down to V_CC = 1.0V, and its reset output remains guaranteed valid (correct logic state) at all V_CC ≥ 1V. At 1.0V, it delivers 80µA sink capability with VOL ≤ 0.3V - making it suitable for ultra-low-voltage applications such as energy-harvesting systems or deeply discharged battery scenarios where MAX6383XR29D1+T maintains deterministic reset behavior.

How does the open-drain output of MAX6383XR29D1+T differ from push-pull alternatives in system design?

The open-drain RESET output of MAX6383XR29D1+T requires an external pullup resistor, enabling wired-OR connection with other reset sources (e.g., watchdog timers or PMICs) on a shared reset bus. Unlike push-pull outputs, it avoids contention and supports mixed-voltage domains - for example, pulling up to 2.5V while monitoring a 3.3V V_CC. This flexibility is intrinsic to MAX6383XR29D1+T's architecture and documented in its typical operating circuit.