Analog Devices Inc./Maxim Integrated MAX6384XS22D3+

Overview

MAX6384XS22D3+ from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 2.19V reset threshold, 140ms minimum VCC reset timeout, active-low push-pull reset output, and debounced manual reset input (MR). It operates from +1.0V to +5.5V supply, consumes only 3µA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in portable battery-powered equipment to prevent code execution errors during power-up and brownout.

For engineers reviewing the MAX6384XS22D3+ datasheet, MAX6384XS22D3+ pinout, MAX6384XS22D3+ application, or MAX6384XS22D3+ equivalent, key selection considerations include its 2.19V ±2.5% threshold accuracy over -40°C to +125°C, SC70-4 package footprint, MR input with internal 63kΩ pullup, and immunity to negative-going VCC transients up to 35µs at 200mV overdrive.

Technical Context

The MAX6384XS22D3+ integrates a precision voltage comparator with ±2.5% threshold accuracy across temperature, an internal reset timer with guaranteed 140ms minimum timeout after VCC recovery, and a debounced manual reset input with 1µs minimum pulse width and 100ns glitch rejection. Its push-pull active-low RESET output drives low with VOL ≤ 0.3V at 80µA sink current for VCC ≥ 1.0V.

It features a dedicated MR input with internal 63kΩ pullup resistor to VCC, enabling direct connection of a momentary switch to GND without external debounce components. The device ensures reliable reset assertion during VCC falling-edge transients by rejecting pulses shorter than the maximum transient duration defined by comparator overdrive - e.g., up to 35µs at 200mV below threshold.

Key Specifications

Pinout & Package

MAX6384XS22D3+ is housed in a lead-free 4-pin SC70 package (X4-1), measuring 1.0mm × 1.0mm × 0.5mm, with 0.65mm pitch and exposed pad option not specified. Pin 1 is RESET, Pin 2 is VCC, Pin 3 is MR, and Pin 4 is GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD3+T and TPS3808G125DBVR, MAX6384XS22D3+ offers the unique combination of factory-set 2.19V threshold, integrated MR input, SC70-4 footprint, and ultra-low 3µA supply current - making it optimal for space-constrained, battery-sensitive applications where precision and simplicity are critical.

Availability

MAX6384XS22D3+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter battery backup systems requiring stable component supply and long-term lifecycle support.

Supply support for MAX6384XS22D3+ 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 power, sensing, and interface applications in industrial, automotive, and computing markets.

The MAX6381–MAX6390 family was developed specifically for low-voltage, low-power microprocessor reset supervision in space- and energy-constrained systems, emphasizing factory-trimmed accuracy, minimal quiescent current, and robust transient immunity.

FAQ

What is the exact reset threshold voltage of MAX6384XS22D3+ and how stable is it over temperature?

The MAX6384XS22D3+ has a factory-set nominal reset threshold of 2.19V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimming during production and confirmed by electrical characterization data showing tempco of 60ppm/°C. The MAX6384XS22D3+ meets this specification without requiring external calibration.

Does MAX6384XS22D3+ require external components for manual reset functionality?

No, MAX6384XS22D3+ does not require external components for manual reset. It integrates a 63kΩ internal pullup resistor on the MR pin, allowing direct connection of a normally open momentary switch between MR and GND. The device also provides built-in debounce with 100ns glitch rejection and 1µs minimum pulse width requirement, eliminating need for RC filters or Schmitt triggers.

What is the minimum VCC voltage at which MAX6384XS22D3+ guarantees correct RESET output logic state?

MAX6384XS22D3+ guarantees that its active-low push-pull RESET output maintains a valid logic state down to VCC = 1.0V. Below this voltage, the internal circuitry may not operate reliably, but at and above 1.0V, the RESET pin will correctly assert low during fault conditions and deassert high when VCC exceeds 2.19V for ≥140ms. This is verified across temperature and process corners.

How does MAX6384XS22D3+ handle short negative-going transients on the VCC rail?

MAX6384XS22D3+ rejects negative-going VCC transients based on magnitude and duration, as characterized in the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph. For example, it ignores transients ≤35µs wide when the overdrive (VTH – VCC) is 200mV. This immunity prevents false resets in electrically noisy environments like motor drives or switching power supplies, without requiring additional input filtering capacitors beyond the recommended 0.1µF.

What package type and dimensions does MAX6384XS22D3+ use, and is it RoHS-compliant?

MAX6384XS22D3+ uses the lead-free 4-pin SC70 package (pkg code X4-1), with body dimensions of 1.0mm × 1.0mm × 0.5mm and 0.65mm pin pitch. The "+" suffix in the part number explicitly denotes RoHS-compliant, lead-free construction per JEDEC J-STD-609. This package supports high-density PCB layouts and is compatible with standard reflow soldering profiles.