Analog Devices Inc./Maxim Integrated MAX6384XS46D2

Overview

MAX6384XS46D2 from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 4.63V reset threshold, 20ms minimum reset timeout, active-low push-pull reset output, and debounced manual reset input (MR). It monitors VCC from +1.8V to +5.0V while consuming only 3µA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6384XS46D2 datasheet, MAX6384XS46D2 pinout, MAX6384XS46D2 application, or MAX6384XS46D2 equivalent, key selection criteria include its 4.63V ±2.5% threshold accuracy over –40°C to +125°C, MR internal 63kΩ pullup, SC70-4 package footprint, and compatibility with systems requiring fast 20ms reset assertion after VCC recovery.

Technical Context

The MAX6384XS46D2 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer for deterministic 20ms reset timeout. Its MR input features built-in glitch rejection (100ns) and 1µs minimum pulse width requirement, enabling robust manual reset initiation without external debounce.

This device uses BiCMOS process technology (647 transistors) and operates over full industrial temperature range (–40°C to +125°C). The push-pull active-low RESET output drives low with VOL ≤ 0.3V at ISINK = 80µA (VCC ≥ 1.0V), ensuring clean interface with µP reset inputs even under low-voltage brownout conditions.

Key Specifications

Pinout & Package

MAX6384XS46D2 is housed in a lead-free 4-pin SC70 package (X4-1), measuring 1.5mm × 1.0mm × 0.8mm, with pins arranged as follows:

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809S and TPS3808G33, MAX6384XS46D2 uniquely combines 4.63V precision threshold, 20ms fast timeout, MR functionality, and minimal SC70-4 footprint-making it optimal for space-constrained 5V embedded systems needing responsive, field-serviceable reset control.

Availability

MAX6384XS46D2 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 MAX6384XS46D2 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 demanding industrial, automotive, and computing applications, with emphasis on low-power, high-reliability performance.

The MAX6381–MAX6390 family was engineered specifically for ultra-low-power microprocessor supervision in battery-operated and thermally harsh environments, delivering factory-trimmed accuracy and deterministic timing in miniature packages.

FAQ

What is the exact reset threshold voltage of MAX6384XS46D2 and how stable is it over temperature?

The MAX6384XS46D2 has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This stability is achieved through factory trimming of an internal bandgap reference and is documented in the Electrical Characteristics table under "VCC Reset Threshold (VTH)" with min/nom/max values of 4.51V/4.63V/4.74V at TA = –40°C to +125°C. The tempco is specified at 60ppm/°C.

Does MAX6384XS46D2 require an external pullup resistor on the MR pin?

No, MAX6384XS46D2 does not require an external pullup resistor on the MR pin. It integrates a 63kΩ internal pullup resistor to VCC, allowing the MR pin to be left unconnected when manual reset functionality is not needed. If MR is used, a normally open momentary switch between MR and GND provides full reset capability without additional components.

What is the function of the RESET output on MAX6384XS46D2 and what are its drive capabilities?

The RESET output on MAX6384XS46D2 is an active-low push-pull driver. It asserts low when VCC falls below 4.63V or when MR is pulled low, and remains low for the full 20ms timeout period after VCC rises above threshold or MR is released. It sources/sinks up to 800µA (VOH/VOL) and guarantees VOL ≤ 0.3V at ISINK = 80µA down to VCC = 1.0V, ensuring interoperability with standard µP reset inputs.

Can MAX6384XS46D2 operate reliably during brief power supply transients?

Yes, MAX6384XS46D2 exhibits immunity to short negative-going VCC transients. Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive", it will not assert reset for transients shorter than ~20µs when the overdrive (VTH – VCC) is 100mV. Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances transient immunity in noisy environments.

What package type and dimensions does MAX6384XS46D2 use, and is it RoHS-compliant?

MAX6384XS46D2 uses a lead-free 4-pin SC70 package (package code X4-1), with nominal dimensions of 1.5mm × 1.0mm × 0.8mm. The package outline conforms to JEDEC MO-203AA and is RoHS-compliant (denoted by the "+" suffix in ordering information). Pin 1 is marked by a dot or beveled edge, and the device is rated for reflow soldering per J-STD-020.