STMicroelectronics STDS75M2F

Overview

STDS75M2F from STMicroelectronics is a high-precision digital temperature sensor IC with integrated delta-sigma ADC, I²C/SMBus interface, ±0.5 °C typical accuracy from –25 °C to +100 °C, 9–12-bit user-configurable resolution (0.5 °C to 0.0625 °C), and open-drain OS/INT alert output for thermal watchdog functionality - used in PC motherboard thermal management, power supply modules, and industrial controller temperature monitoring.

For engineers reviewing the STDS75M2F datasheet, STDS75M2F pinout, STDS75M2F application, or STDS75M2F equivalent, key selection criteria include its 2.7–5.5 V supply range, 125 µA typical operating current, MSOP8 package compatibility, and programmable TOS/THYS thresholds with fault-tolerant comparator/interrupt modes.

Technical Context

The STDS75M2F implements a bandgap-based temperature sensing element paired with a 9–12-bit delta-sigma ADC, delivering calibrated 16-bit two's complement temperature data over a 2-wire I²C interface operating up to 400 kHz. Its internal logic supports autonomous thermal alarm generation without host intervention.

It features three address pins (A0–A2) enabling up to eight devices on one bus, configurable OS/INT polarity (active-low default), and fault tolerance queueing (1–4 consecutive samples) to suppress noise-induced false triggers in industrial environments.

Key Specifications

Pinout & Package

STDS75M2F is housed in an MSOP8 (TSSOP8) package - 8-lead, 3 mm × 3 mm thin shrink small outline - compatible with standard surface-mount assembly and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875 and LM75B, STDS75M2F delivers superior accuracy and programmable fault tolerance in a pin-compatible DS75 form factor - making it optimal for upgrading existing thermal watchdog designs without layout change.

Availability

STDS75M2F is available at Aetrix Electronics and suitable for server thermal management, industrial power supply protection, and automotive infotainment cooling requiring stable component supply across extended product lifecycles.

Supply support for STDS75M2F 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.

The STDS75M2F belongs to ST's precision analog sensor portfolio, engineered specifically for embedded thermal monitoring applications demanding high accuracy, low power, and robust I²C integration without external calibration components.

FAQ

What is the default I²C address of STDS75M2F at power-up?

The STDS75M2F defaults to I²C slave address 0x48 (1001000b) when all address pins A2–A0 are grounded. Address is determined by the 3-bit combination A2A1A0 appended to the base 0x48 prefix, allowing eight unique addresses (0x48–0x4F) on one bus.

How does the OS/INT pin behave in comparator vs. interrupt mode?

In comparator mode, OS/INT remains asserted until temperature falls below THYS; in interrupt mode, OS/INT clears only upon register read or entry into shutdown mode. Both modes use the same TOS/THYS registers and fault tolerance settings, but differ in latching behavior and reset mechanism.

Can STDS75M2F operate without a microcontroller?

Yes - at power-up, STDS75M2F defaults to thermostat mode with factory-programmed thresholds and actively drives OS/INT as a comparator output. No host communication is required for basic overtemperature protection, making it suitable for standalone thermal cutoff circuits.

Is external calibration required for STDS75M2F?

No - STDS75M2F is factory-calibrated across its full –55 °C to +125 °C range and requires no external components or user calibration. The bandgap sensor and delta-sigma ADC are trimmed during production to meet ±0.5 °C typical accuracy specifications.