Analog Devices Inc./Maxim Integrated MAX810MEUR

Overview

MAX810MEUR from Maxim Integrated is a 3-pin push-pull active-high microprocessor supervisory circuit designed to monitor +3.3V power supplies in embedded systems. It asserts a reset signal when VCC falls below 3.08V, maintains reset for ≥140ms after VCC recovers, operates down to VCC = 1V, draws only 17µA typical supply current, and is housed in an SOT23-3 package for space-constrained portable equipment.

For engineers reviewing the MAX810MEUR datasheet, MAX810MEUR pinout, MAX810MEUR application, or MAX810MEUR equivalent, this page delivers verified electrical parameters, thermal performance across -40°C to +105°C, reset timeout behavior, output voltage specifications under load, and real-world interface guidance for µP reset coordination and transient immunity.

Technical Context

The MAX810MEUR implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC drops below its 3.08V threshold. Its push-pull output drives high actively during reset assertion and guarantees valid logic states down to VCC = 1V without external pull-up components.

It features built-in immunity to fast VCC transients-rejecting negative glitches ≤20µs at 100mV overdrive-and delivers a minimum 140ms reset pulse width across full temperature range, ensuring reliable µP initialization during power-up, brownout, and power-down sequences.

Key Specifications

Pinout & Package

MAX810MEUR is packaged in a 3-pin SOT23-3 surface-mount package with 1.3mm × 2.9mm footprint and 0.95mm height, optimized for automated assembly and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810MEUR, MAX809MEUR provides identical monitoring accuracy and thermal range but requires active-low µP interface logic, while TPS3808G30DBVR trades shorter timeout and higher threshold precision for significantly lower supply current-making it suitable for energy-harvesting or battery-critical designs where 350ms reset hold is acceptable.

Availability

MAX810MEUR is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart metering systems requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX810MEUR 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 markets.

The MAX810 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for reliable power-on reset generation, brownout detection, and supply voltage monitoring in resource-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of the MAX810MEUR and how tightly is it specified?

The MAX810MEUR has a nominal reset threshold of 3.08V, specified with ±1.5% tolerance over temperature. This means the actual threshold remains between 3.03V and 3.13V across its full operating range of -40°C to +105°C. The value is factory-trimmed using precision bandgap circuitry and confirmed in the datasheet's Electrical Characteristics table under "Reset Threshold (SOT only)" for the "T" variant. This tight tolerance ensures deterministic reset behavior in +3.3V systems without requiring external calibration or margining.

Does the MAX810MEUR require an external pull-up resistor on its RESET pin?

No, the MAX810MEUR does not require an external pull-up resistor because it features a push-pull output stage that actively drives the RESET pin high during reset assertion and low otherwise. Unlike open-drain variants such as the MAX803, the MAX810MEUR's output can source and sink current directly-verified by its VOH specification (≥0.8×VCC at 150µA source) and VOL specification (≤0.3V at 1.2mA sink). A pull-up is only recommended if RESET must remain valid below VCC = 1V, per application note guidance.

What is the minimum reset pulse width guaranteed by the MAX810MEUR across temperature?

The MAX810MEUR guarantees a minimum reset pulse width of 140ms after VCC rises above the reset threshold, validated across its full operating temperature range of -40°C to +105°C. This specification is explicitly stated in the "Reset Active Timeout Period (SOT23)" row of the Electrical Characteristics table and confirmed in Typical Operating Characteristics plots. The pulse width remains ≥140ms even at +105°C, ensuring reliable µP initialization in thermally demanding environments without external timing components.

Can the MAX810MEUR operate correctly when VCC drops below 1V?

Yes, the MAX810MEUR guarantees correct RESET logic state down to VCC = 1V, meaning it continues to assert or deassert the active-high RESET signal with defined voltage levels (VOH/VOL) until VCC reaches 1V. Below 1V, the output enters high-impedance mode. This behavior is documented in the Absolute Maximum Ratings and Electrical Characteristics sections, and enables robust operation during deep brownout events common in battery-powered systems where supply voltage may decay slowly.

How does the MAX810MEUR handle fast VCC transients or noise spikes?

The MAX810MEUR incorporates inherent immunity to short-duration negative-going VCC transients: it will not generate a false reset pulse for glitches ≤20µs wide when the supply dips 100mV below the 3.08V threshold. This is confirmed in Figure 1 ("Maximum Transient Duration Without Causing a Reset Pulse") and supported by internal comparator hysteresis and filtering design. For enhanced immunity, Maxim recommends placing a 0.1µF bypass capacitor as close as possible to the VCC pin-a practice validated in the Applications Information section.