Analog Devices Inc./Maxim Integrated MAX6501UKP075

Overview

MAX6501UKP075 from Maxim Integrated is a factory-programmed, micropower temperature switch with +75°C hot-trip threshold, active-low open-drain output, and pin-selectable 2°C/10°C hysteresis. It operates from +2.7V to +5.5V, consumes 30µA typical supply current, achieves ±0.5°C typical threshold accuracy over -55°C to +125°C, and requires no external components. It interfaces directly with microprocessor reset inputs in high-speed computing thermal monitoring.

For engineers reviewing the MAX6501UKP075 datasheet, MAX6501UKP075 pinout, MAX6501UKP075 application, or MAX6501UKP075 equivalent, key selection factors include its SOT23-5 package, +75°C trip point, open-drain logic compatibility with µP reset lines, and hysteresis configuration via HYST pin-critical for stable thermal alarm triggering without oscillation near threshold.

Technical Context

The MAX6501UKP075 integrates two on-die temperature-dependent voltage references (one positive TC, one negative TC) whose intersection defines the +75°C trip point. Its internal comparator drives an open-drain output that asserts low when die temperature exceeds +75°C.

Hysteresis is controlled by the HYST pin: grounded for 2°C hysteresis, tied to VCC for 10°C hysteresis-preventing output chatter during slow thermal transitions. The device includes a power-on reset circuit ensuring defined output state for 50µs at startup.

Key Specifications

Pinout & Package

SOT23-5 package with exposed thermal pad not electrically connected; Pin 2 provides lowest thermal resistance path to die for optimal temperature tracking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6502UKP075, MAX6501UKP075 offers µP-reset compatibility but requires external pull-up; compared with LM75BIMM-3/NOPB, it delivers lower power, tighter accuracy, and simpler implementation at the cost of no temperature telemetry.

Availability

MAX6501UKP075 is available at Aetrix Electronics and suitable for microprocessor thermal monitoring, fan control enable signaling, and fail-safe shutdown circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6501UKP075 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 industrial, computing, and communications applications.

The MAX6501–MAX6504 family was engineered as low-cost, micropower thermal switches for deterministic overtemperature response in space- and power-constrained systems-eliminating calibration and external components in reset and alarm functions.

FAQ

What is the exact temperature trip point of the MAX6501UKP075?

The MAX6501UKP075 has a factory-programmed hot-trip threshold of +75°C. When the die temperature exceeds this value, the TOVER output asserts low. This threshold is trimmed during manufacturing and specified with ±0.5°C typical accuracy across the full operating temperature range of -55°C to +125°C. The "P075" suffix explicitly denotes the +75°C trip point.

How does the HYST pin affect hysteresis behavior in the MAX6501UKP075?

In the MAX6501UKP075, the HYST pin selects between two hysteresis values: connecting HYST to GND configures 2°C hysteresis, while connecting it to VCC configures 10°C hysteresis. This prevents output oscillation when temperature approaches the +75°C trip point. Leaving HYST floating increases supply current and is prohibited per the datasheet; the pin must be driven solidly to either rail.

Can the MAX6501UKP075 drive a microprocessor reset input directly?

Yes, the MAX6501UKP075 can drive a microprocessor reset input directly. Its active-low open-drain TOVER output is designed for this purpose: when the die temperature exceeds +75°C, TOVER pulls low, and with a properly sized external pull-up resistor (e.g., 100kΩ to VCC), it meets standard µP reset voltage thresholds. No level-shifting or buffering is required.

What is the supply current consumption of the MAX6501UKP075 under typical operating conditions?

The MAX6501UKP075 consumes 30µA typical supply current across its full operating temperature range (-55°C to +125°C) and supply voltage range (+2.7V to +5.5V). This ultra-low quiescent current minimizes self-heating (ΔT_J < 0.05°C), preserving measurement accuracy and enabling use in battery-backed or energy-harvesting thermal monitoring systems.

Is the MAX6501UKP075 available in a lead-free package?

Yes, the MAX6501UKP075 is offered in a lead(Pb)-free/RoHS-compliant SOT23-5 package, indicated by the "+" suffix in the ordering code (e.g., MAX6501UKP075+T). The package outline and land pattern comply with JEDEC standards, and Maxim's official documentation confirms RoHS compliance for all +T tape-and-reel variants shipped after February 2011.