Analog Devices Inc./Maxim Integrated MAX6383XR16D3-T

Overview

MAX6383XR16D3-T from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit designed to monitor +1.8V to +5.0V supply rails in embedded systems. It features a factory-set reset threshold of +1.58V (±2.5% over −40°C to +125°C), 140ms minimum reset timeout, 3μA supply current at +1.8V, and guaranteed valid reset output down to VCC = 1V. It is used in battery-powered instrumentation and critical μP power-up sequencing.

For engineers reviewing the MAX6383XR16D3-T datasheet, MAX6383XR16D3-T pinout, MAX6383XR16D3-T application, or MAX6383XR16D3-T equivalent, key selection considerations include its open-drain active-low reset output, SC70-3 package footprint, 140ms timeout delay, ±2.5% threshold accuracy across temperature, and compatibility with 1V–5.5V VCC operation.

Technical Context

The MAX6383XR16D3-T implements a precision voltage comparator with internal +1.58V reference and hysteresis-free detection logic. Its reset assertion is triggered solely by VCC falling below the fixed threshold, followed by a deterministic 140ms (min) timeout after VCC recovery - no manual reset or auxiliary input is present.

This variant belongs to the MAX6383 family subset with open-drain active-low RESET output, 3-pin SC70 packaging, and no MR or RESET IN terminals. It lacks debounced manual reset capability and dual-voltage monitoring, distinguishing it from MAX6384–MAX6390 and MAX6387–MAX6389 variants.

Key Specifications

Pinout & Package

MAX6383XR16D3-T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208). The device has no internal connections on unused pins - only three terminals are functional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383XR16D3-T, MAX809TRD3-T simplifies BOM by eliminating the pullup resistor but forfeits reset bus flexibility, while TPS3123E16DBVR offers tighter threshold tolerance and lower current at the expense of automotive reliability assurance and documented noise immunity.

Availability

MAX6383XR16D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383XR16D3-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, automotive, and computing applications, with expertise in power management and supervisory circuits.

The MAX6381–MAX6390 product line delivers ultra-low-power, factory-trimmed reset supervisors optimized for battery longevity, wide-temperature reliability, and minimal PCB area in space- and power-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of MAX6383XR16D3-T and how stable is it over temperature?

The MAX6383XR16D3-T has a nominal reset threshold of +1.58V, with guaranteed tolerance of ±2.5% across the full operating temperature range of −40°C to +125°C. This stability is achieved through laser-trimmed on-chip references and BiCMOS process matching, ensuring consistent brownout detection without external calibration - critical for applications like portable medical sensors where supply rails drift near threshold limits.

Does MAX6383XR16D3-T support manual reset functionality?

No, MAX6383XR16D3-T does not include a manual reset (MR) input. It is a dedicated VCC-only supervisor with open-drain active-low RESET output. Manual reset capability is present only in MAX6384/MAX6385/MAX6386/MAX6390 variants. For designs requiring operator-initiated reset, consider MAX6384XR16D3-T instead - it shares the same threshold and timeout but adds an MR pin with internal pullup.

Can MAX6383XR16D3-T operate reliably at VCC = 1.0V?

Yes, MAX6383XR16D3-T guarantees correct reset output logic state down to VCC = 1.0V, as confirmed in the Electrical Characteristics table. At this voltage, the open-drain RESET output maintains VOL ≤0.3V when asserted (ISINK = 80µA), enabling safe μP hold during ultra-low-power wake-up sequences - a key differentiator versus many competing supervisors that fail below 1.2V.

What package type and footprint does MAX6383XR16D3-T use?

MAX6383XR16D3-T uses a 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), measuring 1.25mm × 0.85mm with 0.65mm pin pitch. This RoHS-compliant, lead-free package is pin-compatible with industry-standard SC70-3 footprints and supports reflow soldering per JEDEC J-STD-020 (peak 260°C). No thermal pad or exposed die attach is present.

Is MAX6383XR16D3-T qualified for automotive applications?

MAX6383XR16D3-T is not explicitly AEC-Q100 qualified - that designation applies only to parts with "/V" suffix (e.g., MAX6383XR16D3/V+T). However, it is rated for −40°C to +125°C operation and meets all electrical specifications across that range, making it suitable for non-safety-critical automotive subsystems such as infotainment power sequencing or body electronics where formal qualification is not mandated.