Analog Devices Inc./Maxim Integrated MAX6384XS46D3

Overview

MAX6384XS46D3 from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 4.63V reset threshold, 140ms minimum reset timeout, active-low push-pull reset output, and debounced manual reset input. It monitors +1.8V to +5.0V supply rails in battery-powered embedded controllers and portable instrumentation where ultra-low quiescent current (3µA at +1.8V) and guaranteed reset validity down to VCC = 1V are critical.

For engineers reviewing the MAX6384XS46D3 datasheet, MAX6384XS46D3 pinout, MAX6384XS46D3 application, or MAX6384XS46D3 equivalent, this page delivers verified electrical parameters, SC70-4 package mapping, reset timing behavior under brownout and manual trigger conditions, and validated alternative options for power-supply monitoring in space-constrained industrial and portable designs.

Technical Context

The MAX6384XS46D3 integrates a precision voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and a temperature-stable internal timer that guarantees ≥140ms reset assertion after VCC recovery. Its MR input features a 63kΩ internal pullup resistor and supports TTL/CMOS logic levels with 1µs minimum pulse width and 100ns glitch rejection.

This device operates across 1.0V to 5.5V supply range and maintains valid reset output state down to VCC = 1V. The active-low push-pull RESET output sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, eliminating need for external pull-up resistors unlike open-drain variants.

Key Specifications

Pinout & Package

MAX6384XS46D3 is housed in a lead-free 4-pin SC70 package (X4-1), measuring 1.5mm × 1.0mm × 0.8mm, suitable for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR46D3, the MAX6384XS46D3 adds MR functionality in a 4-pin SC70 footprint; versus TPS3808G33DBVR, it offers precise factory-set 4.63V detection without external components but lacks an enable input-making it optimal for cost-sensitive, space-limited applications needing guaranteed brownout response and manual reset.

Availability

MAX6384XS46D3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX6384XS46D3 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, emphasizing low power, high reliability, and small form factor.

The MAX6381–MAX6390 family delivers single/dual low-voltage µP reset circuits optimized for battery-powered and space-constrained systems where supply monitoring must coexist with minimal quiescent current and guaranteed timing behavior.

FAQ

What is the exact reset threshold voltage of the MAX6384XS46D3?

The MAX6384XS46D3 has a factory-set 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 value is confirmed in the Reset Thresholds table of the datasheet, where suffix "46" corresponds to VTH(nom) = 4.63V, VTH(min) = 4.51V, and VTH(max) = 4.74V. The MAX6384XS46D3 does not require external resistor networks to set this threshold.

Does the MAX6384XS46D3 support manual reset functionality?

Yes, the MAX6384XS46D3 includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 140ms timeout period after MR is released. This feature is explicitly documented in the Selector Guide and Pin Description sections, distinguishing MAX6384XS46D3 from non-MR variants like MAX6381/MAX6382.

What package type and dimensions does the MAX6384XS46D3 use?

The MAX6384XS46D3 is supplied in a lead-free 4-pin SC70 package (package code X4-1), with outline dimensions of 1.5mm × 1.0mm × 0.8mm. This is confirmed in the Ordering Information table, where "XS" denotes the 4-pin SC70 variant, and the Package Information section provides mechanical drawings labeled "SC70, 4L.EPS". It is not offered in µDFN or 3-pin SC70 configurations.

How does the MAX6384XS46D3 behave during deep brownout conditions?

The MAX6384XS46D3 guarantees valid reset output state down to VCC = 1V, meaning its RESET pin remains logically correct (asserted low during fault, deasserted high otherwise) even as supply voltage collapses. This is specified in the Electrical Characteristics table under "RESET Output State Guaranteed Valid Down to VCC = 1V", enabling robust fail-safe behavior in systems experiencing severe undervoltage events.

Is the MAX6384XS46D3 pin-compatible with older Maxim reset ICs like MAX809?

Yes, the MAX6384XS46D3 is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy Maxim supervisors per the Features section. However, due to its 4-pin SC70 footprint (VCC, RESET, MR, GND), direct replacement requires verifying that the target PCB layout allocates space for the fourth MR pin - unlike 3-pin MAX809 variants which lack MR. Functional equivalence holds for VCC supervision, but MR functionality adds capability not present in MAX809.