Analog Devices Inc./Maxim Integrated MAX6501CMP065

Overview

MAX6501CMP065 from Maxim Integrated is a factory-programmed, hot-temperature-threshold micropower temperature switch in TO-220-7 package with +65°C trip point, ±0.5°C typical accuracy, active-low open-drain output, and pin-selectable +2°C/+10°C hysteresis. It operates from +2.7V to +5.5V, draws 30µA supply current, and interfaces directly with µP reset inputs for thermal monitoring in high-speed computing systems.

For engineers reviewing the MAX6501CMP065 datasheet, MAX6501CMP065 pinout, MAX6501CMP065 application, or MAX6501CMP065 equivalent, key selection factors include its fixed +65°C overtemperature threshold, TO-220 thermal performance, open-drain logic compatibility, and hysteresis configuration via HYST pin voltage level.

Technical Context

The MAX6501CMP065 uses dual on-chip temperature-dependent voltage references (one positive, one negative TC) whose intersection defines the +65°C trip point. Its internal comparator asserts TOVER low when die temperature exceeds this threshold, with hysteresis determined by HYST pin voltage (GND = +2°C, VCC = +10°C).

No external components are required: the device integrates reference generation, comparison, and output drive. The TO-220-7 package provides low thermal resistance (75°C/W), enabling direct heatsink mounting and accurate ambient-to-die thermal coupling for system-level overtemperature protection.

Key Specifications

Pinout & Package

MAX6501CMP065 is housed in a 7-pin TO-220 package with exposed tab (pin 7) connected to GND. Pin 2 is the primary ground connection with lowest thermal resistance to the die. The package is designed for through-hole mounting and heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6501UKP065, the MAX6501CMP065 offers superior thermal response in heatsink-mounted applications due to its TO-220 package's 75°C/W θ_JA, while LM20BIMAX/NOPB requires additional circuitry to replicate basic overtemperature switching functionality.

Availability

MAX6501CMP065 is available at Aetrix Electronics and suitable for microprocessor thermal reset, industrial power supply protection, and PLC cabinet monitoring requiring stable component supply and long-term lifecycle support.

Supply support for MAX6501CMP065 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 markets.

The MAX6501–MAX6504 family delivers low-cost, micropower temperature switches with factory-trimmed thresholds for reliable overtemperature protection in cost-sensitive, high-volume thermal monitoring applications.

FAQ

What is the exact temperature trip point of the MAX6501CMP065?

The MAX6501CMP065 has a factory-programmed hot-temperature threshold of +65°C. This means the TOVER output goes low when the die temperature exceeds +65°C. The device achieves ±0.5°C typical accuracy across its operating range, with maximum error specified at ±6°C. This fixed threshold eliminates the need for external calibration components in production systems using MAX6501CMP065.

How does the HYST pin function on the MAX6501CMP065?

The HYST pin on MAX6501CMP065 selects hysteresis magnitude: connecting it to GND sets +2°C hysteresis, while connecting it to VCC sets +10°C hysteresis. This prevents output oscillation when die temperature approaches the +65°C trip point. The pin must not float - undefined voltages increase supply current. Hysteresis is implemented entirely within MAX6501CMP065 and requires no external components.

Can the MAX6501CMP065 interface directly with a 3.3V microprocessor reset input?

Yes, MAX6501CMP065 can directly interface with a 3.3V µP reset input. Its open-drain TOVER output sinks current when tripped and is compatible with pull-up resistors to 3.3V or 5V rails. The output voltage low (V_OL) is guaranteed ≤0.3V at I_SINK = 1.2mA, ensuring clean logic-low assertion of the reset line. No level-shifting circuitry is needed when using MAX6501CMP065 in 3.3V systems.

What is the thermal resistance of the MAX6501CMP065 package, and why does it matter?

The MAX6501CMP065 uses a TO-220-7 package with a typical junction-to-ambient thermal resistance (θ_JA) of 75°C/W. This low value enables efficient heat transfer from the die to an attached heatsink or PCB copper plane. Accurate temperature monitoring depends on minimizing thermal resistance between the monitored component and MAX6501CMP065's die - the TO-220 package's performance makes it ideal for direct heatsink mounting in power electronics applications.

Does the MAX6501CMP065 require any external components to operate?

No, MAX6501CMP065 requires no external components to function as a standalone temperature switch. It integrates two temperature-dependent voltage references, a comparator, and an open-drain output driver. Only a pull-up resistor on the TOVER pin is needed for proper logic-level interfacing - this is not part of the sensing circuit but rather an interface requirement for the open-drain topology used in MAX6501CMP065.