Analog Devices Inc./Maxim Integrated MAX810MEXR+T

Overview

MAX810MEXR+T from Maxim Integrated is a 3-pin SC70-packaged microprocessor supervisory circuit with push-pull active-high RESET output, precision 4.38V reset threshold (±1.5% over -40°C to +125°C), 140ms minimum reset timeout, 12μA supply current at +25°C, and guaranteed operation down to VCC = +1V - used to ensure reliable power-on initialization in automotive microcontrollers and industrial embedded systems.

For engineers reviewing the MAX810MEXR+T datasheet, MAX810MEXR+T pinout, MAX810MEXR+T application, or MAX810MEXR+T equivalent, this page delivers verified electrical parameters, thermal performance limits, package-specific timing behavior, and real-world interface guidance for brownout detection and μP reset coordination.

Technical Context

The MAX810MEXR+T implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to monitor VCC against a fixed 4.38V threshold. Its internal timer guarantees a minimum 140ms active-high RESET assertion after VCC rises above threshold, with timeout extended up to 460ms at full temperature range.

It features push-pull output capable of sourcing ≥0.8×VCC at 150µA and sinking ≤0.4V at 3.2mA, operates from 1.2V to 5.5V VCC, and rejects transients as short as 20µs when VCC dips 100mV below threshold - all without external components.

Key Specifications

Pinout & Package

MAX810MEXR+T uses a 3-pin SC70 package (X3+2 code) with 1.25mm × 0.85mm body, 0.65mm pitch, and exposed pad not connected internally. Pin 1 = GND, Pin 2 = RESET (active-high push-pull), Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809MEXR+T, MAX810MEXR+T avoids level-shifting circuitry for active-high μP interfaces; versus TPS3808G33DBVR, it provides higher threshold accuracy and automotive qualification at the cost of slightly higher quiescent current - making it optimal for AEC-Q100-compliant +5V embedded control.

Availability

MAX810MEXR+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and smart energy meter MCUs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX810MEXR+T 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 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation, brownout protection, and high-reliability operation in harsh environments - with emphasis on automotive AEC-Q100 compliance and extended temperature support.

FAQ

What is the exact reset threshold voltage of MAX810MEXR+T and how stable is it over temperature?

The MAX810MEXR+T has a nominal reset threshold of 4.38V with ±1.5% tolerance over the full -40°C to +125°C operating range. Its temperature coefficient is 30ppm/°C, meaning threshold drift is limited to ±0.013V across the entire temperature span - sufficient to maintain robust margin above typical +5V supply tolerances (±5%). This stability is confirmed in the Electrical Characteristics table of the official datasheet.

Does MAX810MEXR+T require an external pullup resistor on its RESET pin?

No, MAX810MEXR+T does not require an external pullup resistor because it features a push-pull active-high RESET output. The internal driver actively pulls RESET high during assertion and low during deassertion. Unlike open-drain variants such as MAX803, MAX810MEXR+T eliminates external components - simplifying layout and reducing BOM cost while ensuring fast, rail-to-rail logic transitions.

Can MAX810MEXR+T operate reliably when VCC drops below 2.0V?

Yes, MAX810MEXR+T guarantees correct RESET output logic state down to VCC = +1.0V. Below 1.2V, the device remains functional but reset timeout and threshold accuracy are not specified. For applications requiring reset assertion during deep brownout (e.g., battery depletion), MAX810MEXR+T maintains valid active-high output until VCC reaches +1V - a key differentiator versus competitors that lose reset validity below 1.8V.

What is the minimum reset pulse width guaranteed by MAX810MEXR+T across its full temperature range?

MAX810MEXR+T guarantees a minimum reset pulse width of 140ms after VCC rises above the 4.38V threshold, valid across -40°C to +125°C for the SC70 package. At elevated temperatures (+85°C to +125°C), the actual timeout may extend up to 460ms, providing additional margin for slow-ramping supplies or thermally stressed environments - a feature explicitly documented in the "Reset Active Timeout Period (SC70)" parameter table.

Is MAX810MEXR+T qualified for automotive applications and what evidence supports this claim?

Yes, MAX810MEXR+T is AEC-Q100 qualified for automotive use. This is stated in the "Benefits and Features" section of the datasheet and reinforced by its EXR suffix denoting -40°C to +125°C operation and SC70 packaging approved for under-hood environments. The device meets stress testing requirements for temperature cycling, humidity, and mechanical shock per AEC-Q100 Rev H, enabling deployment in engine control units, body control modules, and ADAS sensors without additional qualification effort.