Analog Devices Inc./Maxim Integrated MAX6506UTP065+T

Overview

MAX6506UTP065+T from Maxim Integrated is a dual-threshold, push-pull output temperature switch with factory-programmed +65°C ALARM trip point and WARN threshold set to +55°C (ΔTAW = +10°C). It operates from +2.5V to +5.5V, consumes 30µA typical supply current, and delivers ±0.5°C typical threshold accuracy over –40°C to +125°C. Used for fail-safe thermal monitoring in microprocessor systems requiring early warning and hard shutdown signals.

For engineers reviewing the MAX6506UTP065+T datasheet, MAX6506UTP065+T pinout, MAX6506UTP065+T application, or MAX6506UTP065+T equivalent, key selection criteria include its push-pull logic outputs, pin-selectable ΔTAW (5/10/20/30°C), SOT23-6 package, and absence of external components for trip-point configuration.

Technical Context

The MAX6506UTP065+T integrates two precision bandgap references-one with positive and one with negative temperature coefficient-to generate a voltage crossing point defining the +65°C ALARM threshold. Its WARN output activates at +55°C using the same die-sensing element, with hysteresis controlled by internal comparator design and pin-strapping of S0/S1.

Unlike open-drain variants, the MAX6506UTP065+T uses complementary MOS push-pull outputs capable of sourcing up to 800µA and sinking up to 3.2mA, eliminating external pull-up resistors. The device requires only a 0.1µF ceramic bypass capacitor on VCC and exhibits negligible self-heating (ΔTJ < 0.3°C at full load) due to its 30µA quiescent current and 115°C/W θJA.

Key Specifications

Pinout & Package

SOT23-6 package: ultra-compact surface-mount outline with 0.95mm pitch, thermally optimized for direct PCB mounting adjacent to heat sources.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6505UTP065+T and LM75BIMM/NOPB, the MAX6506UTP065+T uniquely delivers push-pull immediacy, ±0.5°C analog accuracy, and dual-hardwired thresholds-making it optimal for safety-critical, latency-sensitive thermal cutoffs where MCU involvement is undesirable or unavailable.

Availability

MAX6506UTP065+T is available at Aetrix Electronics and suitable for microprocessor thermal guardrails, fan speed control triggers, power supply overtemperature lockout, and industrial motor drive thermal backup requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6506UTP065+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, computing, and communications applications, emphasizing high accuracy, low power, and small form factor.

The MAX6505–MAX6508 family was engineered specifically for hardware-based thermal management-delivering factory-trimmed dual thresholds in minimal SOT23 packaging to replace discrete sensor+comparator solutions in space-constrained, safety-critical systems.

FAQ

What is the exact ALARM and WARN trip temperature for MAX6506UTP065+T?

The MAX6506UTP065+T has a factory-programmed ALARM trip temperature of +65°C and a WARN trip temperature of +55°C. This +10°C delta (ΔTAW) is achieved by strapping S0 to VCC and S1 to GND per Table 1 in the datasheet. Both thresholds are trimmed during wafer sort and guaranteed across –40°C to +125°C operating range.

Does MAX6506UTP065+T require external pull-up resistors on its outputs?

No, the MAX6506UTP065+T does not require external pull-up resistors because it features push-pull (totem-pole) outputs on both ALARM and WARN pins. Each output can source up to 800µA and sink up to 3.2mA, enabling direct connection to standard CMOS inputs without additional components.

Can the trip temperatures of MAX6506UTP065+T be adjusted after manufacturing?

No, the trip temperatures of MAX6506UTP065+T are factory-laser-trimmed and permanently fixed at +65°C (ALARM) and +55°C (WARN). There is no user-adjustable potentiometer, register, or digital interface-this is a dedicated hardware thermal switch, not a programmable sensor.

What is the recommended bypass capacitor for MAX6506UTP065+T?

A 0.1µF ceramic capacitor is required between VCC and GND, placed as close as possible (<2mm trace length) to the MAX6506UTP065+T's VCC pin. This ensures stable internal reference operation and suppresses supply noise that could affect ±0.5°C threshold accuracy, especially during fast temperature transients.

How does self-heating affect the accuracy of MAX6506UTP065+T?

Self-heating in the MAX6506UTP065+T is negligible-typical power dissipation is 155µW (5.5V × 30µA), resulting in <0.02°C die temperature rise (ΔTJ = P × θJA = 0.000155W × 115°C/W). This is well below the ±0.5°C accuracy spec and does not require derating in standard PCB layouts.