Analog Devices Inc./Maxim Integrated MAX6348XR41

Overview

The MAX6348XR41 from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.1V power supplies and assert a reset signal during brownout or power-up conditions. It features a factory-trimmed 4.100V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 100ms minimum reset timeout, ultra-low 1µA max supply current, and operates from VCC = 1.2V to 5.5V. It is used in portable/battery-powered equipment requiring reliable power-on reset functionality.

For engineers reviewing the MAX6348XR41 datasheet, MAX6348XR41 pinout, MAX6348XR41 application, or MAX6348XR41 equivalent, this device serves as a precision voltage-monitoring reset generator with open-drain output compatibility for bidirectional µP reset pins, transient immunity, and SC70-3 footprint suitability for space-constrained embedded designs.

Technical Context

The MAX6348XR41 implements a precision bandgap-based reset comparator with 40ppm/°C temperature coefficient and 9.5mV hysteresis to prevent chatter near threshold. Its open-drain RESET output requires an external pull-up and supports bidirectional reset assertion-enabling direct interface with µPs like the Motorola 68HC11 without additional logic.

It guarantees correct reset state down to VCC = 1.0V (1.2V min over full temperature range), ignores fast VCC transients ≤20µs (at 100mV overdrive), and delivers a minimum 100ms reset pulse width after VCC rises above threshold-ensuring stable processor initialization across industrial temperature range (-40°C to +85°C).

Key Specifications

Pinout & Package

MAX6348XR41 is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (marked "FZCF").

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6328XR41 (identical function, alternate marking), MAX6348XR41 offers same performance but with updated factory traceability and packaging compliance; versus TPS3808G33DBVR, it provides precise 4.1V detection and essential open-drain architecture for legacy µP interface-making it irreplaceable in brownout-critical 4.1V systems.

Availability

MAX6348XR41 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart utility meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6348XR41 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 industrial, communications, and consumer applications, with emphasis on power management, sensing, and reliability.

The MAX63xx family delivers ultra-low-power, factory-trimmed µP reset supervisors targeting battery-operated and space-constrained embedded systems where accuracy, stability, and minimal footprint are critical.

FAQ

What is the exact reset threshold voltage of the MAX6348XR41 and how tightly is it specified?

The MAX6348XR41 has a factory-trimmed nominal reset threshold of 4.100V. At +25°C, this is guaranteed within ±1.5% (4.038V to 4.161V). Over the full industrial temperature range (-40°C to +85°C), the threshold remains within ±2.5% (3.997V to 4.202V), as confirmed in Table 1 of the official datasheet. This precision eliminates need for external calibration components.

Does the MAX6348XR41 support operation at VCC voltages below 2.5V, and what is its minimum functional supply voltage?

Yes, the MAX6348XR41 operates down to VCC = 1.2V over the full -40°C to +85°C temperature range, and functions correctly at 1.0V at +25°C. Its internal circuitry remains in a known reset state throughout this range, enabling use in deep brownout scenarios and low-voltage battery backup systems where other supervisors fail.

What is the output configuration of the MAX6348XR41, and why does it matter for system design?

The MAX6348XR41 features an active-low open-drain RESET output. This allows wired-OR connection with other reset sources (e.g., manual reset buttons or watchdog outputs) and direct interfacing with microprocessors having bidirectional reset pins-such as the Motorola 68HC11-using only a single external pull-up resistor, simplifying board layout and reducing component count.

How long is the reset pulse width generated by the MAX6348XR41 after VCC rises above the threshold?

The MAX6348XR41 asserts RESET for a minimum of 100ms after VCC rises above the 4.100V threshold. The actual timeout ranges from 100ms to 280ms depending on temperature and unit variation, providing ample time for microprocessor initialization, PLL locking, and memory stabilization before release from reset.

Is the MAX6348XR41 pin-compatible with older Maxim reset supervisors like the MAX809, and what package does it use?

Yes, the MAX6348XR41 is pin-compatible with the MAX809 and other industry-standard 3-pin reset supervisors. It uses the SC70-3 package (2.0mm × 2.1mm), matching the footprint and pinout of the MAX809, MAX803, and MAX810-enabling direct replacement in existing designs without PCB modification.