Analog Devices Inc./Maxim Integrated MAX6505UTP065

Overview

MAX6505UTP065 from Maxim Integrated is a dual-threshold, open-drain temperature switch in SOT23-6 package, with factory-programmed ALARM trip at +65°C and WARN trip at +55°C (ΔT_AW = 10°C), ±0.5°C typical threshold accuracy, 30µA typical supply current, and operation from +2.5V to +5.5V. It enables fail-safe thermal monitoring in high-speed microprocessor systems where early warning and hard alarm outputs are required.

For engineers reviewing the MAX6505UTP065 datasheet, MAX6505UTP065 pinout, MAX6505UTP065 application, or MAX6505UTP065 equivalent, this page delivers verified functional identity, confirmed SOT23-6 pin mapping, exact trip-point configuration (+65°C ALARM / +55°C WARN), hysteresis behavior (≈2°C on ALARM, ≈5°C on WARN), and validated alternative options for thermal monitoring designs.

Technical Context

The MAX6505UTP065 integrates two precision bandgap-based temperature references and dual comparators to detect die temperature crossing factory-set thresholds. Its ALARM output asserts low when temperature exceeds +65°C; WARN asserts low when temperature exceeds +55°C - both with open-drain logic compatible with 3.3V/5V systems.

Delta-temperature selection is fixed by internal programming: S0 and S1 pins are internally tied to configure ΔT_AW = +10°C (per Figure 1 and Table 1). No external hysteresis components or calibration are needed, and self-heating impact is negligible (<0.3°C) due to 30µA quiescent current and 115°C/W θ_JA.

Key Specifications

Pinout & Package

SOT23-6 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6505UTP065, MAX6505UTP060 offers tighter thermal margins for conservative designs, while MAX6506UTP065 replaces open-drain flexibility with simplified push-pull interfacing - both retain identical accuracy, supply range, and SOT23-6 footprint.

Availability

MAX6505UTP065 is available at Aetrix Electronics and suitable for microprocessor thermal monitoring, fan control, industrial power supply protection, and embedded system fail-safe monitoring requiring stable component supply and guaranteed long-term availability.

Supply support for MAX6505UTP065 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 precision analog, mixed-signal, and power management ICs for industrial, computing, and communications applications.

The MAX6505–MAX6508 family was designed specifically for low-cost, high-accuracy, dual-threshold thermal monitoring in space-constrained systems - delivering factory-programmed trip points, zero-external-component operation, and SOT23-6 integration.

FAQ

What is the exact ALARM and WARN trip temperature for MAX6505UTP065?

The MAX6505UTP065 has a factory-programmed ALARM trip point of +65°C and a WARN trip point of +55°C, resulting in a fixed ΔT_AW of +10°C. These values are laser-trimmed during production and do not require external configuration. The MAX6505UTP065 datasheet Figure 1 explicitly confirms this configuration under "Temperature Response-MAX6505UTP065 Outputs".

Does MAX6505UTP065 require external pull-up resistors on its outputs?

Yes, MAX6505UTP065 features open-drain ALARM and WARN outputs, so external pull-up resistors are required to establish valid logic-high levels. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. The MAX6505UTP065 Electrical Characteristics table specifies RPULLUP = 100kΩ for supply current testing.

What is the hysteresis behavior of MAX6505UTP065's ALARM and WARN outputs?

The MAX6505UTP065 exhibits ≈2°C hysteresis on the ALARM output (e.g., trips at +65°C, releases at ≈+63°C) and ≈5°C hysteresis on the WARN output (e.g., trips at +55°C, releases at ≈+50°C). This behavior is inherent to the device architecture and confirmed in Figure 1 caption: "HYSTERESIS ≈ 2°C" and "HYSTERESIS ≈ 5°C".

Can MAX6505UTP065 operate from a 3.3V supply?

Yes, MAX6505UTP065 operates across +2.5V to +5.5V, fully supporting standard 3.3V logic rails. Its output voltage low (V_OL) is guaranteed ≤0.5V at I_SINK = 3.2mA, and input logic thresholds scale with V_CC, ensuring reliable interfacing with 3.3V MCUs without level shifters.

Is MAX6505UTP065 pin-compatible with other devices in the MAX6505–MAX6508 family?

Yes, all MAX6505–MAX6508 variants share the identical SOT23-6 pinout and footprint. However, output logic type differs: MAX6505/MAX6507 use open-drain outputs, while MAX6506/MAX6508 use push-pull. Swapping MAX6505UTP065 with MAX6506UTP065 requires verifying MCU input compatibility with active-high vs. active-low signaling.