Analog Devices Inc./Maxim Integrated MAX810TEXR

Overview

MAX810TEXR from Maxim Integrated is a 3-pin microprocessor supervisory circuit with push-pull active-high RESET output, designed to monitor +3.0V power supplies and assert reset during brownout or power-up conditions. It features a precision 3.08V reset threshold (±1.5% over temperature), 140ms minimum reset timeout, 12µA supply current at +25°C, guaranteed operation down to VCC = +1V, and SC70-3 package for space-constrained embedded systems.

For engineers reviewing the MAX810TEXR datasheet, MAX810TEXR pinout, MAX810TEXR application, or MAX810TEXR equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in portable and automotive systems, and validated alternative parts with documented functional differences.

Technical Context

The MAX810TEXR implements a precision voltage comparator with internal hysteresis to detect VCC falling below 3.08V, triggering an active-high RESET signal that remains asserted for ≥140ms after VCC rises above threshold. Its push-pull output drives high without external components and sinks up to 3.2mA at VCC = 3.08V.

Designed for +3.0V systems, it operates across –40°C to +125°C in SC70-3 packaging, maintains reset validity down to VCC = +1V, and rejects transients ≤20µs at 100mV overdrive-enabling reliable operation in noisy battery-powered environments.

Key Specifications

Pinout & Package

MAX810TEXR uses a 3-pin SC70-3 package with exposed pad (no thermal pad connection required). Pin 1 is RESET (active-high push-pull), Pin 2 is GND, and Pin 3 is VCC. The device requires no external components for basic operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810TEXR, MAX809TEXR requires µP-level logic inversion and cannot drive active-high-only interfaces, while TPS3123E18DBVR sacrifices automotive temperature capability and doubles supply current-making MAX810TEXR the optimal choice for high-reliability, low-power, extended-temperature designs.

Availability

MAX810TEXR is available at Aetrix Electronics and suitable for automotive body control modules, portable medical monitors, industrial PLC I/O subsystems, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.

Supply support for MAX810TEXR 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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.

The MAX810 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation in space- and power-constrained embedded systems with stringent reliability requirements.

FAQ

What is the exact reset threshold voltage of the MAX810TEXR and how tightly is it specified?

The MAX810TEXR has a nominal reset threshold of 3.08V, with a guaranteed tolerance of ±1.5% over the full operating temperature range of –40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official Maxim datasheet (Rev 6, 12/05), where VTH for MAX810T is listed as 3.04V (min), 3.08V (typ), and 3.11V (max) at +25°C, and 3.00V (min) to 3.15V (max) across –40°C to +85°C. The MAX810TEXR variant uses the SC70-3 package and maintains this same threshold accuracy.

Does the MAX810TEXR require any external components to function correctly?

No, the MAX810TEXR requires zero external components for basic operation. Its push-pull active-high RESET output eliminates the need for a pull-up resistor, and its internal voltage reference and timing circuitry remove dependencies on capacitors or resistors. A 0.1µF bypass capacitor placed close to the VCC pin is recommended for enhanced transient immunity, but it is not required for functional reset assertion per the datasheet.

What is the minimum VCC voltage at which the MAX810TEXR guarantees correct RESET logic state?

The MAX810TEXR guarantees correct RESET logic state-specifically, RESET remains high while VCC is below the threshold and for ≥140ms after VCC rises above it-down to VCC = +1V. This is explicitly stated in the General Description and Electrical Characteristics sections of the datasheet, and verified in the "Ensuring a Valid Reset Output Down to VCC = 0" application note, which confirms push-pull output functionality remains defined through VCC = +1V.

Can the MAX810TEXR be used in automotive applications, and what temperature range does it support?

Yes, the MAX810TEXR is qualified for automotive applications. Its SC70-3 package version (denoted by the "EXR" suffix) is rated for operation from –40°C to +125°C, matching AEC-Q100 Grade 2 requirements for under-hood and cabin electronics. This is confirmed in the Ordering Information table, where MAX810_EXR-T and MAX810_EXR-T10 list "–40°C to +125°C" under Temperature Range for the SC70-3 package.

How does the MAX810TEXR handle fast voltage transients on the VCC line?

The MAX810TEXR incorporates built-in transient immunity: its reset comparator ignores negative-going VCC transients ≤20µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in Figure 1 of the datasheet. This design prevents false resets caused by switching noise or load-dump events. For maximum robustness, Maxim recommends placing a 0.1µF ceramic capacitor as close as possible to the VCC pin.