Analog Devices Inc./Maxim Integrated MAX810ZEXR

Overview

The MAX810ZEXR from Maxim Integrated is a 3-pin microprocessor supervisory circuit with active-high push-pull reset output, designed to monitor +2.5V power supplies and assert reset during brownout or power-up conditions. It features a precision 2.32V reset threshold, guaranteed operation down to VCC = +1V, 140ms minimum reset timeout, 12µA supply current at +25°C, and SC70-3 packaging for space-constrained embedded systems.

For engineers reviewing the MAX810ZEXR datasheet, MAX810ZEXR pinout, MAX810ZEXR application, or MAX810ZEXR equivalent, this page delivers verified functional identity, exact reset threshold and timing behavior, package-specific thermal performance (–40°C to +125°C), and real-world interface guidance for µP reset line conditioning and low-voltage validity assurance.

Technical Context

The MAX810ZEXR implements a precision voltage comparator with 30ppm/°C tempco to detect VCC falling below 2.32V, triggering an active-high RESET signal that remains asserted for ≥140ms after VCC rises above threshold. Its push-pull output drives high to 0.8×VCC at 150µA source current and low to ≤0.4V at 3.2mA sink current.

Designed for +2.5V systems, it operates across full industrial temperature range (–40°C to +125°C) in SC70-3 package, with guaranteed reset validity down to VCC = +1V and immunity to transients ≤20µs when VCC dips 100mV below threshold.

Key Specifications

Pinout & Package

MAX810ZEXR is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm × 0.55mm height), optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810ZEXR, MAX809ZEXR requires µP-level logic inversion and lacks native compatibility with active-high reset pins, while TPS3808G12DBVR trades SC70 size and ultra-low ICC for longer timeout and broader vendor support-making MAX810ZEXR optimal for compact, battery-sensitive +2.5V systems demanding exact 2.32V trip point.

Availability

MAX810ZEXR is available at Aetrix Electronics and suitable for battery-powered IoT sensors, automotive body controllers, industrial PLC expanders, medical point-of-care devices, and portable instrumentation requiring stable component supply across extended temperature ranges.

Supply support for MAX810ZEXR 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, automotive, communications, and computing applications.

The MAX810 family delivers highly accurate, low-power reset supervision for +2.5V to +5V digital systems, targeting applications where deterministic power-on sequencing and brownout resilience are critical.

FAQ

What is the exact reset threshold voltage of the MAX810ZEXR and how is it specified over temperature?

The MAX810ZEXR has a nominal reset threshold of 2.32V, with ±20mV tolerance at +25°C and guaranteed operation across –40°C to +125°C. Its 30ppm/°C temperature coefficient ensures total drift remains under 0.5% over the full range, making MAX810ZEXR suitable for applications demanding stable trip points in varying thermal environments.

Does the MAX810ZEXR require an external pull-up resistor on its RESET pin?

No, the MAX810ZEXR features a push-pull output stage and does not require an external pull-up resistor. Its active-high RESET pin drives high to ≥0.8×VCC at 150µA and low to ≤0.4V at 3.2mA, enabling direct connection to standard CMOS reset inputs without additional components-unlike open-drain alternatives such as the MAX803 series.

What is the minimum VCC voltage at which the MAX810ZEXR guarantees valid RESET output behavior?

The MAX810ZEXR guarantees correct RESET logic state down to VCC = +1V. Below this level, output behavior is not specified. For applications requiring RESET validity down to 0V, a 100kΩ pull-down resistor on the RESET line is recommended to prevent floating states during deep brownout-this design consideration applies specifically to MAX810ZEXR in ultra-low-power shutdown scenarios.

How does the MAX810ZEXR handle fast power-supply transients on the VCC line?

The MAX810ZEXR's reset comparator is designed to ignore fast negative-going VCC transients; for example, a 100mV dip below threshold lasting ≤20µs will not trigger a false reset. This immunity is confirmed in the datasheet's transient rejection curves and ensures robust operation in noisy automotive or industrial environments where MAX810ZEXR is commonly deployed.

What package type and dimensions does the MAX810ZEXR use, and is it RoHS-compliant?

The MAX810ZEXR is supplied in a 3-pin SC70-3 package measuring 1.25mm × 0.85mm × 0.55mm (height). It is available in both leaded and lead-free versions; specify lead-free by ordering MAX810ZEXR+T instead of MAX810ZEXR-T. The SC70 footprint reduces board area by over 40% versus SOT23-3, supporting high-density designs where MAX810ZEXR's compact form factor is essential.