Analog Devices Inc./Maxim Integrated MAX6383XR29D2+T

Overview

MAX6383XR29D2+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), and 20ms minimum reset timeout. It monitors VCC from +1.0V to +5.5V, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered embedded controllers for reliable power-up sequencing and brownout protection.

For engineers reviewing the MAX6383XR29D2+T datasheet, MAX6383XR29D2+T pinout, MAX6383XR29D2+T application, or MAX6383XR29D2+T equivalent, key selection criteria include its 3-pin SC70 open-drain configuration, 2.93V threshold accuracy, 20ms timeout, immunity to negative-going VCC transients, and compatibility with dual-voltage monitoring systems requiring external pullup.

Technical Context

The MAX6383XR29D2+T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco. Its internal timer initiates a fixed 20ms reset assertion window after VCC recovers above 2.93V, independent of supply ramp rate.

As an open-drain active-low device, it requires an external pullup resistor on RESET and supports wired-OR configurations. It lacks MR or RESET IN pins - confirming single-supply monitoring only - and operates with guaranteed logic validity down to VCC = 1V, enabling use in ultra-low-voltage brownout detection.

Key Specifications

Pinout & Package

MAX6383XR29D2+T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with 0.65mm pitch and 1.25mm × 0.85mm footprint - optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383XR29D2+T, MAX809TRD2+T eliminates the need for a pullup resistor but increases quiescent current 5×, while TPS3808G18DBVR offers broader voltage support but trades off automotive qualification and ultra-low power - making MAX6383XR29D2+T optimal for space- and battery-constrained AEC-Q100–aligned designs.

Availability

MAX6383XR29D2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply and long-term lifecycle assurance.

Supply support for MAX6383XR29D2+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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and thermally harsh systems - engineered specifically for reliable μP boot integrity under brownout, startup, and transient conditions.

FAQ

What is the exact reset threshold voltage of MAX6383XR29D2+T and how stable is it over temperature?

The MAX6383XR29D2+T has a factory-set nominal reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is limited to ±0.03V across the entire temperature span - critical for maintaining consistent reset behavior in automotive and industrial environments where MAX6383XR29D2+T is commonly deployed.

Does MAX6383XR29D2+T support manual reset functionality?

No, MAX6383XR29D2+T does not include a manual reset (MR) input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which features only VCC monitoring and open-drain reset output. Models like MAX6384 or MAX6390 add MR capability; MAX6383XR29D2+T is intentionally simplified for cost- and space-sensitive applications where only automatic power-supply supervision is required.

What package type and dimensions does MAX6383XR29D2+T use?

MAX6383XR29D2+T uses the 3-pin SC70 package (outline number 21-0075), measuring 1.25mm × 0.85mm with 0.65mm pin pitch. This RoHS-compliant, lead-free package is optimized for high-density PCB layouts in portable and wearable electronics - and is distinct from the 4-pin SC70 or 6-pin μDFN variants used by other members of the MAX6381–MAX6390 family.

Can MAX6383XR29D2+T monitor a second voltage rail?

No, MAX6383XR29D2+T does not support auxiliary voltage monitoring. It lacks the RESET IN pin found on MAX6387–MAX6389 variants. Its function is strictly limited to supervising the VCC supply rail. For dual-rail applications - such as monitoring both core and I/O voltages - designers must select a member of the MAX6387 series or implement discrete solutions alongside MAX6383XR29D2+T.

What is the minimum VCC voltage at which MAX6383XR29D2+T guarantees correct reset output logic state?

MAX6383XR29D2+T guarantees valid reset output logic state down to VCC = 1.0V. Below this, the internal circuitry cannot maintain defined output behavior. This specification ensures deterministic reset assertion during deep brownout recovery - a key differentiator versus competitors whose reset outputs may float or glitch below 1.5V. The guarantee applies to both asserted and deasserted states of the open-drain RESET line.