Analog Devices Inc./Maxim Integrated MAX6383XR16D1+T

Overview

MAX6383XR16D1+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), 1ms minimum reset timeout, and 3μA supply current at +1.8V. It monitors single VCC supply in battery-powered or space-constrained embedded systems requiring guaranteed reset assertion down to VCC = 1V.

For engineers reviewing the MAX6383XR16D1+T datasheet, MAX6383XR16D1+T pinout, MAX6383XR16D1+T application, or MAX6383XR16D1+T equivalent, key selection factors include its 3-pin SC70 package, open-drain output requiring external pullup, 1.58V threshold for 1.8V logic rails, immunity to negative-going VCC transients, and compatibility with critical μP power-up sequencing in portable equipment.

Technical Context

The MAX6383XR16D1+T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 1.58V threshold, with ±2.5% accuracy across −40°C to +125°C and 60ppm/°C tempco. Its internal timer guarantees a minimum 1ms reset assertion after VCC rises above threshold.

No manual reset input (MR) or auxiliary RESET IN is present-this variant is strictly single-supply, VCC-only monitoring with open-drain active-low RESET output. Reset state remains valid down to VCC = 1V, ensuring reliable behavior during brownout recovery.

Key Specifications

Pinout & Package

MAX6383XR16D1+T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383XR16D1+T, MAX809TRD1+T offers simpler interface at higher current cost, while TPS3808G15DBVR delivers superior accuracy and efficiency at the expense of 20× longer reset hold time-making MAX6383XR16D1+T optimal for 1ms-critical, open-drain–required, and automotive-qualified designs.

Availability

MAX6383XR16D1+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 MAX6383XR16D1+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 microprocessors in battery-constrained and thermally harsh environments-specifically targeting reliable power-up sequencing where minimal footprint and guaranteed VCC = 1V operation are essential.

FAQ

What is the exact reset threshold voltage of MAX6383XR16D1+T and how accurate is it over temperature?

The MAX6383XR16D1+T has a factory-set reset threshold of 1.58V (nominal), with guaranteed accuracy of ±2.5% over the full operating range of −40°C to +125°C. This is confirmed in the Electrical Characteristics table under "VCC Reset Threshold" with min/max bounds of 1.54V and 1.61V at temperature extremes. The device uses a precision bandgap reference and achieves 60ppm/°C tempco, ensuring stability across thermal cycling.

Does MAX6383XR16D1+T include a manual reset input (MR) or auxiliary RESET IN pin?

No, MAX6383XR16D1+T does not include MR or RESET IN functionality. Per the Selector Guide and Pin Configurations, only MAX6384–MAX6386 and MAX6390 feature MR, while MAX6387–MAX6389 include RESET IN. MAX6383XR16D1+T is a minimal-feature variant: VCC-only monitoring with open-drain active-low RESET output in 3-pin SC70.

What is the minimum reset timeout period for MAX6383XR16D1+T and how is it implemented?

The MAX6383XR16D1+T provides a minimum reset timeout period of 1ms (suffix D1), as defined in the Reset Timeout Delay table. This is a monolithic, temperature-compensated RC-based timer internal to the IC-no external components required. The timeout begins when VCC rises above the 1.58V threshold and guarantees RESET remains asserted for ≥1ms before deassertion, satisfying μP minimum pulse-width requirements.

Can MAX6383XR16D1+T operate reliably when VCC drops below 1.8V, and down to what voltage does reset remain valid?

Yes, MAX6383XR16D1+T is fully specified to operate down to VCC = 1.0V, and its RESET output state is guaranteed valid at that level. The Electrical Characteristics table confirms "Reset Output State Guaranteed Valid Down to VCC = 1V", with VOL ≤0.3V at ISINK = 80µA. This ensures deterministic behavior during brownout recovery-even as VCC decays from 1.8V to 1.0V, the open-drain RESET remains a solid logic low.

Is MAX6383XR16D1+T pin-compatible with other members of the MAX6381–MAX6390 family in the same package?

Yes, MAX6383XR16D1+T shares identical 3-pin SC70 pinout (RESET, VCC, GND) with MAX6381XRxxDx+T and MAX6382XRxxDx+T variants. However, output type differs: MAX6381 has push-pull active-low, MAX6382 has push-pull active-high, while MAX6383XR16D1+T uses open-drain active-low-requiring an external pullup resistor not needed for the push-pull versions.