Analog Devices Inc./Maxim Integrated MAX6501UKP035-T

Overview

MAX6501UKP035-T from Maxim Integrated is a factory-programmed, hot-temperature-threshold micropower temperature switch in SOT23-5 package, asserting an active-low open-drain output when die temperature exceeds +35°C. It operates from +2.7V to +5.5V, consumes 30µA typical supply current, features ±0.5°C typical threshold accuracy over full range, and supports pin-selectable 2°C or 10°C hysteresis. It is used for microprocessor reset initiation in high-speed computing thermal monitoring.

For engineers reviewing the MAX6501UKP035-T datasheet, MAX6501UKP035-T pinout, MAX6501UKP035-T application, or MAX6501UKP035-T equivalent, key selection criteria include trip-point precision (+35°C), open-drain output compatibility with µP reset inputs, low quiescent current for battery-sensitive systems, thermal response in still air (12s to 90% step), and SOT23-5 footprint constraints.

Technical Context

The MAX6501UKP035-T integrates two on-die temperature-dependent voltage references-one with positive and one with negative temperature coefficient-whose intersection defines the +35°C trip point. Its comparator drives an open-drain output stage that sinks up to 1.2mA at VCC > 2.7V, with guaranteed VOL ≤ 0.3V under that condition.

A dedicated HYST input selects hysteresis: GND yields 2°C, VCC yields 10°C. Internal power-on reset holds TOVER in known state for 50µs at startup. The device requires no external components beyond a 100kΩ pullup resistor on TOVER and exhibits negligible self-heating (ΔTJ < 0.042°C at 1mA sink).

Key Specifications

Pinout & Package

SOT23-5 package with exposed pad not electrically connected; Pin 2 provides lowest thermal resistance to die and must be tied to ground with short, wide copper trace for accurate thermal coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature switch applications.

Compared with LM75BIMM/NOPB and TC74A0-5.0VCTTR, the MAX6501UKP035-T delivers immediate, autonomous reset signaling without MCU involvement, lower power consumption, and tighter threshold tolerance-making it optimal for safety-critical, low-latency thermal protection where simplicity and determinism are paramount.

Availability

MAX6501UKP035-T is available at Aetrix Electronics and suitable for microprocessor thermal reset, fan control initiation, temperature alarm systems, and fail-safe thermal monitoring requiring stable component supply across industrial, computing, and medical electronics programs.

Supply support for MAX6501UKP035-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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX6501–MAX6504 family was developed specifically for cost-sensitive, space-constrained thermal protection tasks-delivering factory-trimmed accuracy, micropower operation, and direct µP interface capability in ultra-small SOT23 packages.

FAQ

What is the exact temperature trip point of the MAX6501UKP035-T?

The MAX6501UKP035-T has a factory-programmed hot-temperature threshold of +35°C. It asserts its active-low TOVER output when the die temperature rises above this point. This value is trimmed during manufacturing and specified with ±0.5°C typical accuracy across the full operating range of -55°C to +125°C.

Does the MAX6501UKP035-T require external components to operate?

No, the MAX6501UKP035-T requires no external passive components for core functionality. Only a 100kΩ pullup resistor on the TOVER pin is needed to interface with standard µP reset inputs. No capacitors, resistors, or trimming networks are necessary-enabling minimal footprint and simplified layout.

How is hysteresis configured on the MAX6501UKP035-T?

Hysteresis on the MAX6501UKP035-T is selected via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. This pin must not be left floating, as intermediate voltages increase supply current. The actual hysteresis value also depends on the programmed trip point, per the device's typical operating characteristics.

Can the MAX6501UKP035-T drive a microprocessor reset input directly?

Yes, the MAX6501UKP035-T's active-low open-drain TOVER output is designed explicitly for µP reset interface. When paired with a 100kΩ pullup resistor to VCC (or a higher rail), it pulls the reset line low upon overtemperature detection, meeting standard reset timing requirements without additional buffering or level translation.

What is the thermal response time of the MAX6501UKP035-T in still air?

The MAX6501UKP035-T exhibits a thermal step response of approximately 12 seconds to reach 90% of final temperature in still air when mounted on 0.75in² of 2 oz. copper. This response time reflects the SOT23-5 package's thermal mass and interface quality-critical for aligning thermal event detection with actual system thermal dynamics.