Analog Devices Inc./Maxim Integrated MAX810LEUR

Overview

The MAX810LEUR from Maxim Integrated is a 3-pin SOT23-3 microprocessor supervisory circuit with push-pull active-high RESET output, designed to monitor +5V power supplies in embedded systems. It asserts reset when VCC falls below 4.63V, holds reset for ≥140ms after VCC recovers, operates down to VCC = 1V, draws only 12µA supply current, and features ±30ppm/°C reset threshold tempco - used in portable equipment, industrial controllers, and automotive ECUs.

For engineers reviewing the MAX810LEUR datasheet, MAX810LEUR pinout, MAX810LEUR application, or MAX810LEUR equivalent, this page delivers verified functional identity, exact reset threshold (4.63V), active-high push-pull output behavior, guaranteed 140ms timeout, and confirmed SOT23-3 package mapping - all validated against Maxim's official datasheet Rev 6 (12/2005).

Technical Context

The MAX810LEUR implements a precision voltage comparator with hysteresis-free detection of VCC decay below 4.63V, triggering an active-high push-pull RESET signal. Its internal reset timer guarantees minimum 140ms assertion after VCC rises above threshold, independent of supply ramp rate.

Designed for immunity to fast transients, it ignores VCC glitches ≤20µs at 100mV overdrive and maintains valid logic states down to VCC = 1V. The device requires no external components and supports operation across –40°C to +105°C in SOT23-3 packaging.

Key Specifications

Pinout & Package

MAX810LEUR is supplied in a 3-pin SOT23-3 surface-mount package with JEDEC MO-178AC outline, 1.3mm × 2.9mm footprint, and 0.95mm height - compatible with standard reflow profiles for leaded and lead-free assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX810LEUR, MAX809LEUR requires system-level signal inversion and lacks native compatibility with active-high reset architectures, while TPS3123QDBVRQ1 adds AEC-Q100 validation overhead and higher quiescent current - making MAX810LEUR optimal for cost-sensitive industrial and portable designs requiring precise active-high reset signaling.

Availability

MAX810LEUR is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical instruments requiring stable component supply with guaranteed long-term sourcing.

Supply support for MAX810LEUR 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 communications applications.

The MAX810LEUR belongs to Maxim's microprocessor supervisory product line, engineered specifically for reliable power-on reset generation in space-constrained embedded systems with strict current and timing requirements.

FAQ

What is the exact reset threshold voltage of the MAX810LEUR?

The MAX810LEUR has a factory-trimmed reset threshold of 4.63V ±1.5%, specified over –40°C to +105°C. This value is guaranteed per Maxim's datasheet Rev 6 and applies to the L-suffix variant in SOT23-3 packaging. The threshold remains stable with ±30ppm/°C tempco, ensuring consistent performance across operating temperature ranges without external calibration. MAX810LEUR uses this precise trip point to initiate reset before critical logic voltage margins are violated.

Does the MAX810LEUR require an external pull-up resistor on its RESET pin?

No, the MAX810LEUR does not require an external pull-up resistor because it features a push-pull active-high output stage. Its RESET pin actively drives high (≥0.8×VCC) when asserted and low (≤0.4V) when deasserted, eliminating reliance on external biasing. This differs from open-drain variants like MAX803LEUR. MAX810LEUR's integrated driver simplifies PCB layout and improves noise immunity in systems with multiple reset sources.

What is the minimum VCC voltage at which MAX810LEUR guarantees valid RESET output logic levels?

The MAX810LEUR guarantees correct RESET logic states down to VCC = 1V. Below this voltage, the output may become indeterminate. This specification ensures deterministic reset behavior during deep brownout conditions where the monitored supply collapses gradually. MAX810LEUR maintains this guarantee across its full operating temperature range (–40°C to +105°C), making it suitable for applications requiring fail-safe operation near power failure thresholds.

How long does the MAX810LEUR hold the RESET signal active after VCC rises above the threshold?

The MAX810LEUR holds the active-high RESET signal for a minimum of 140ms after VCC rises above 4.63V. This timeout is internally generated and independent of supply ramp rate or external components. The specification is guaranteed over temperature (–40°C to +105°C) and ensures sufficient hold time for even the slowest microprocessors to complete power-on initialization sequences. MAX810LEUR's fixed timeout eliminates variability introduced by RC-based reset circuits.

Is the MAX810LEUR compatible with both leaded and lead-free soldering processes?

Yes, the MAX810LEUR is available in both leaded and lead-free packaging configurations. To specify lead-free, replace the "-T" suffix with "+T" in the order code (e.g., MAX810LEUR+T). The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for standard reflow profiles including Pb-free SAC305. MAX810LEUR's SOT23-3 package supports compatibility with automated assembly lines using either process without redesign.