Analog Devices Inc./Maxim Integrated MAX6383XR22D3

Overview

MAX6383XR22D3 from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit in a 3-pin SC70 package. It monitors VCC from +1.0V to +5.5V with a factory-set reset threshold of +2.19V (±2.5% over –40°C to +125°C) and guarantees valid reset output down to VCC = 1V. It provides a 140ms minimum reset timeout period and consumes only 3µA at +1.8V, making it suitable for battery-powered embedded systems requiring reliable power-on reset.

For engineers reviewing the MAX6383XR22D3 datasheet, MAX6383XR22D3 pinout, MAX6383XR22D3 application, or MAX6383XR22D3 equivalent, key selection criteria include its open-drain active-low reset output, 2.19V threshold accuracy across automotive temperature range, 140ms timeout timing, ultra-low quiescent current, and compatibility with 1.8V/2.5V/3.3V/5V supply rails in space-constrained designs.

Technical Context

The MAX6383XR22D3 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer ensures a guaranteed minimum 140ms reset assertion after VCC rises above 2.19V, independent of supply ramp rate.

This device uses an open-drain RESET output requiring an external pull-up resistor and guarantees correct logic state down to VCC = 1V - enabling robust reset signaling during brownout conditions without external level-shifting circuitry.

Key Specifications

Pinout & Package

MAX6383XR22D3 is housed in a 3-pin SC70 package (package code X3-2), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD3+T and TPS3808G12DBVR, the MAX6383XR22D3 offers optimal balance of ultra-low ICC (3µA), industry-standard SC70-3 footprint, and open-drain flexibility - making it preferred for cost-sensitive, space-constrained, and multi-rail reset architectures where external pull-up is acceptable.

Availability

MAX6383XR22D3 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 with guaranteed long-term availability.

Supply support for MAX6383XR22D3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The MAX6381–MAX6390 family was designed specifically for low-voltage, low-power microprocessor reset supervision in battery-operated and thermally demanding applications - emphasizing precision threshold accuracy, nanoscale leakage control, and minimal footprint.

FAQ

What is the exact reset threshold voltage of the MAX6383XR22D3?

The MAX6383XR22D3 has a factory-set nominal reset threshold of +2.19V, with guaranteed limits of +2.13V (min) and +2.24V (max) over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet and reflects ±2.5% accuracy including process and temperature variation.

Does the MAX6383XR22D3 include a manual reset input (MR)?

No, the MAX6383XR22D3 does not include a manual reset input. According to the Selector Guide and Pin Description sections, only MAX6384/MAX6385/MAX6386/MAX6390 feature MR. The MAX6383XR22D3 is a dedicated VCC-monitoring device with RESET and GND pins only - confirmed by its 3-pin SC70 pinout and absence of MR in all functional block diagrams.

What is the minimum supply voltage at which the MAX6383XR22D3 guarantees correct reset output logic state?

The MAX6383XR22D3 guarantees valid reset output logic state down to VCC = 1.0V, as explicitly stated in the Electrical Characteristics table under "Reset Output State Guaranteed Valid Down to VCC = 1V". Below 1.0V, the device may not assert or deassert reset reliably - this specification enables robust brownout detection in low-voltage systems.

Can the MAX6383XR22D3 be used with a 5V supply rail?

Yes, the MAX6383XR22D3 supports VCC from +1.0V to +5.5V per Absolute Maximum Ratings and Electrical Characteristics tables. When used with a 5V rail, its 2.19V reset threshold still applies - meaning it will assert reset if the 5V supply drops below 2.19V, which is appropriate for detecting catastrophic failure rather than nominal regulation. For 5V-system supervision, a higher-threshold variant (e.g., MAX6383XR40D3) would be more suitable.

Is an external pull-up resistor required for the MAX6383XR22D3 RESET pin?

Yes, an external pull-up resistor is mandatory for the MAX6383XR22D3 because it features an open-drain active-low RESET output. The datasheet specifies that the RESET pin requires an external pull-up to define the high state when not asserted. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements - omission of this resistor will result in undefined or floating reset logic levels.