Analog Devices Inc./Maxim Integrated MAX6383LT16D3+T

Overview

MAX6383LT16D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.58V reset threshold (±2.5% over −40°C to +125°C), 140ms minimum reset timeout, and guaranteed operation down to VCC = 1.0V. It monitors single supply voltage in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6383LT16D3+T datasheet, MAX6383LT16D3+T pinout, MAX6383LT16D3+T application, or MAX6383LT16D3+T equivalent, key selection considerations include its open-drain reset architecture requiring external pullup, 3μA supply current at 1.8V, −40°C to +125°C operating range, and compatibility with compact 6-pin μDFN packaging for space-constrained designs.

Technical Context

The MAX6383LT16D3+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across temperature, coupled to a monolithic timer that guarantees minimum 140ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup resistor and remains valid down to VCC = 1.0V, enabling robust reset signaling even during deep undervoltage conditions.

No manual reset input (MR) or auxiliary RESET IN pin is present - this variant is optimized for single-supply monitoring only. The device uses BiCMOS process technology and is RoHS-compliant (+T suffix), with no automotive qualification (/V) indicated in the part number.

Key Specifications

Pinout & Package

MAX6383LT16D3+T is housed in a 6-pin μDFN package (outline 21-0147, land pattern 90-0080), measuring 1.5mm × 1.5mm with 0.5mm pitch and exposed pad for thermal enhancement. Pin 1 is marked by a dot or chamfered corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383LT16D3+T, MAX6326LTR16D3+T simplifies BOM by removing the pullup resistor but sacrifices reset bus flexibility, while TPS3808G16DBVR offers tighter threshold tolerance and lower current at the cost of vendor-specific design integration and loss of open-drain configurability.

Availability

MAX6383LT16D3+T is available at Aetrix Electronics and suitable for industrial automation, portable medical devices, smart metering, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383LT16D3+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 industrial, communications, computing, and consumer applications, emphasizing low power, high reliability, and small form factors.

The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting space- and power-sensitive embedded systems needing guaranteed reset behavior across harsh environmental conditions.

FAQ

What is the exact reset threshold voltage of MAX6383LT16D3+T and how stable is it over temperature?

The MAX6383LT16D3+T has a factory-set reset threshold of 1.58V, specified with ±2.5% accuracy over the full −40°C to +125°C operating range. This stability is achieved using a precision bandgap reference and laser-trimmed resistors, ensuring consistent brownout detection without external calibration. The MAX6383LT16D3+T maintains this tolerance across all production lots and temperature extremes, making it suitable for mission-critical industrial applications.

Does MAX6383LT16D3+T include a manual reset input (MR) or auxiliary voltage monitor (RESET IN)?

No, MAX6383LT16D3+T does not include a manual reset input or auxiliary RESET IN pin. It is a single-supply, open-drain reset supervisor only - the MR and RESET IN functions are present only in other variants like MAX6384–MAX6386 (MR) or MAX6387–MAX6389 (RESET IN). The MAX6383LT16D3+T pinout contains three N.C. pins and is optimized strictly for VCC monitoring with minimal external components.

What package type and dimensions does MAX6383LT16D3+T use, and is thermal performance documented?

MAX6383LT16D3+T uses a 6-pin μDFN package (1.5mm × 1.5mm, 0.5mm pitch) with exposed thermal pad (outline 21-0147). Its thermal resistance is characterized as θJA = 477°C/W and θJC = 122°C/W on a multilayer board per JEDEC JESD51-7. This package enables high-density placement while maintaining adequate power dissipation for its 3μA operating current - no heatsink is required in standard industrial applications.

Can MAX6383LT16D3+T drive a reset line directly, or does it require external components?

MAX6383LT16D3+T requires an external pullup resistor on its open-drain RESET pin - typically 10kΩ to 100kΩ connected to the host logic rail (e.g., 3.3V or 5V). It cannot drive the reset line directly like a push-pull device. This architecture enables wired-OR reset busing and voltage-level translation. The MAX6383LT16D3+T itself sinks ≤3.2mA when asserted and leaks <1.0μA when deasserted, meeting standard CMOS input requirements.

Is MAX6383LT16D3+T qualified for automotive applications?

No, MAX6383LT16D3+T is not automotive-qualified. Its part number lacks the "/V" suffix required for AEC-Q100 qualification. While it operates from −40°C to +125°C - matching the automotive ambient temperature range - it has not undergone the full AEC-Q100 stress testing (e.g., HTOL, TC, ESD). For automotive body electronics, consider MAX6383LT16D3/V+T or equivalent /V-suffixed variants explicitly certified to AEC-Q100 Rev H.