Analog Devices Inc./Maxim Integrated MAX810SEUR-T

Overview

MAX810SEUR-T from Maxim Integrated is a 3-pin SOT23-packaged microprocessor supervisory circuit with push-pull active-high RESET output, 2.93V ±1.5% reset threshold (−40°C to +105°C), 140ms minimum reset timeout, 12μA supply current at +25°C, and guaranteed operation down to VCC = 1V - used for reliable power-on/brownout reset assertion in embedded μP systems.

For engineers reviewing the MAX810SEUR-T datasheet, MAX810SEUR-T pinout, MAX810SEUR-T application, or MAX810SEUR-T equivalent, this page delivers verified electrical behavior, package-specific timing, thermal operating limits, reset polarity confirmation, and real-world interface guidance for industrial controllers, portable instrumentation, and automotive-grade monitoring circuits.

Technical Context

The MAX810SEUR-T implements a precision voltage comparator with built-in hysteresis and a monostable timer to generate a minimum 140ms active-high RESET pulse upon VCC falling below 2.93V or rising above it after dropout. Its push-pull output drives directly into CMOS inputs without external pullup.

Designed for +2.5V/+3.0V/+3.3V systems, it guarantees valid reset assertion across −40°C to +105°C, tolerates VCC transients ≤20μs at 100mV overdrive, and maintains RESET logic state integrity down to VCC = 1V - enabling robust boot sequencing in battery-backed and low-voltage microcontroller applications.

Key Specifications

Pinout & Package

MAX810SEUR-T is housed in a RoHS-compliant 3-pin SOT23 package (package code U3-1), with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads. Thermal resistance θJA = 250°C/W (FR-4, 1-in² copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810SEUR-T, MAX809SEUR-T demands logic inversion in reset-handling firmware or hardware, while TPS3808G33DBVR trades guaranteed 140ms timing for lower ICC and longer timeout - making MAX810SEUR-T optimal for timing-critical, cost-sensitive industrial controllers.

Availability

MAX810SEUR-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical instrumentation, automotive body control modules, and smart energy metering hardware requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX810SEUR-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 markets, with emphasis on high-reliability, low-power, and small-footprint solutions.

The MAX810SEUR-T belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic power-monitoring in resource-constrained embedded systems where reset accuracy, timing predictability, and thermal robustness are non-negotiable.

FAQ

What is the exact reset threshold voltage of the MAX810SEUR-T and how does it vary with temperature?

The MAX810SEUR-T has a nominal reset threshold of 2.93V, specified as 2.85V (min) to 3.00V (max) over −40°C to +85°C, and 2.78V (min) to 3.08V (max) over −40°C to +105°C. This ±1.5% tolerance ensures consistent triggering across its full automotive-grade operating range without calibration. The MAX810SEUR-T uses trimmed on-chip resistors and bandgap references to achieve this stability, with tempco limited to 30ppm/°C.

Does the MAX810SEUR-T require an external pullup resistor on the RESET pin?

No, the MAX810SEUR-T features a push-pull active-high RESET output and does not require an external pullup resistor. Its output actively drives high during reset and low otherwise, eliminating floating-state risk and reducing BOM count. This differs from the open-drain MAX803 series, which mandates a pullup. The MAX810SEUR-T's VOH ≥ 0.8×VCC at 150μA ensures compatibility with standard CMOS inputs.

What is the minimum VCC voltage at which the MAX810SEUR-T guarantees valid RESET output logic states?

The MAX810SEUR-T guarantees correct RESET logic state (high during reset, low otherwise) for VCC down to 1.0V. Below 1.0V, output behavior is not specified. This feature enables fail-safe shutdown sequencing in systems where controlled power-down is required - for example, preserving EEPROM writes or disabling power switches before VCC collapses completely. The MAX810SEUR-T achieves this via internal biasing independent of VCC regulation.

Can the MAX810SEUR-T be used in automotive applications, and what qualifications does it meet?

Yes, the MAX810SEUR-T is rated for −40°C to +105°C operation and is offered in lead-free, RoHS-compliant SOT23 packaging. While not explicitly AEC-Q100 qualified, its temperature range, transient immunity (≤20μs glitches), and 1.2V–5.5V VCC range align with automotive body electronics requirements. For AEC-Q100 Grade 2 compliance, consider the pin-compatible MAX810SEUR/V+T variant - the MAX810SEUR-T itself is widely deployed in non-safety-critical automotive modules.

How does the MAX810SEUR-T handle fast transients on the VCC supply line?

The MAX810SEUR-T incorporates comparator hysteresis and internal filtering to reject VCC transients ≤20μs in duration when the overdrive (VTH − VCC) is ≤100mV - verified per Figure 1 in the datasheet. This prevents false resets caused by switching regulator noise or ESD coupling. A 0.1μF ceramic capacitor placed within 2mm of the VCC pin further enhances immunity, making the MAX810SEUR-T suitable for noisy industrial power environments.