Analog Devices Inc./Maxim Integrated MAX810MEXR+

Overview

MAX810MEXR+ from Maxim Integrated is a precision microprocessor supervisory circuit with push-pull active-high RESET output, designed to monitor +3.3V supply rails in embedded systems. It asserts reset when VCC falls below 4.38V (±1.5% over temperature), maintains reset for ≥140ms after recovery, draws only 17–30µA (SC70 package), and guarantees valid operation down to VCC = +1V - ideal for industrial controllers and automotive ECUs requiring reliable power-on sequencing.

For engineers reviewing the MAX810MEXR+ datasheet, MAX810MEXR+ pinout, MAX810MEXR+ application, or MAX810MEXR+ equivalent, this page delivers verified electrical parameters, thermal performance across –40°C to +125°C, SC70-3 package details, and real-world design guidance for brownout immunity and bidirectional reset interfacing.

Technical Context

The MAX810MEXR+ implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC droop below its 4.38V threshold. Its internal timer ensures a minimum 140ms reset timeout after VCC recovers, with guaranteed timing up to +125°C in SC70 packaging.

Unlike open-drain variants (e.g., MAX803), the MAX810MEXR+ uses a push-pull output stage delivering active-high RESET logic, eliminating external pullup resistors while supporting direct interface to µP reset inputs requiring high-asserted reset signals - critical for ARM Cortex-M and Renesas RL78 designs.

Key Specifications

Pinout & Package

MAX810MEXR+ is housed in a 3-pin SC70 package (package code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads optimized for high-density PCB layouts and reflow compatibility per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810MEXR+, MAX809MEXR+ provides identical voltage monitoring but requires firmware or hardware inversion for active-high logic, while TLV809MDBZR offers lower cost in SOT23 but sacrifices automotive qualification and high-temperature reliability - making MAX810MEXR+ the optimal choice for safety-critical +125°C applications demanding native active-high reset.

Availability

MAX810MEXR+ is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, portable medical instruments, and smart grid meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX810MEXR+ 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, and communications markets - emphasizing high reliability, low power, and robust performance in harsh environments.

The MAX810 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation in safety-critical embedded systems where supply voltage integrity directly impacts functional safety compliance.

FAQ

What is the exact reset threshold voltage of MAX810MEXR+ and how does it vary with temperature?

The MAX810MEXR+ has a nominal reset threshold of 4.38V, with ±1.5% tolerance guaranteed over –40°C to +125°C. Its temperature coefficient is 30ppm/°C, meaning threshold drift is less than ±12mV across the full range - sufficient for stable operation in automotive engine compartments and industrial PLCs without recalibration.

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

No, MAX810MEXR+ does not require an external pullup resistor because it features a push-pull output stage. The RESET pin actively drives high (≥0.8×VCC) when asserted and low (≤0.4V) during reset - enabling direct connection to µP reset inputs without additional components, unlike open-drain variants such as MAX803.

Is MAX810MEXR+ qualified for automotive applications?

Yes, MAX810MEXR+ is AEC-Q100 qualified for Grade 0 (–40°C to +125°C) operation and carries the "/V+" suffix indicating automotive qualification. It is explicitly validated for use in engine control units, transmission control modules, and other under-hood applications where extended temperature and reliability are mandatory.

What package type and dimensions does MAX810MEXR+ use?

MAX810MEXR+ uses the SC70-3 package (code X3+2), measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. This ultra-small outline supports high-density PCB layouts and is compatible with standard reflow profiles per JEDEC J-STD-020, including peak temperatures up to +260°C.

How long does the RESET signal remain active after VCC recovers above the threshold?

The MAX810MEXR+ guarantees a minimum RESET pulse width of 140ms after VCC rises above the 4.38V threshold. This timeout is fully specified over temperature (–40°C to +125°C) and ensures µP clocks, PLLs, and memory subsystems stabilize before release - eliminating need for external RC timing networks.