STMicroelectronics STTS75M2F

Overview

STTS75M2F from STMicroelectronics is a high-precision digital temperature sensor IC with integrated delta-sigma ADC, I²C/SMBus interface, and programmable thermal watchdog functionality. It measures from –55 °C to +125 °C with ±0.5 °C typical accuracy (±2 °C max in –25 °C to +100 °C), operates from 2.7 V to 5.5 V, draws 75 µA typical supply current, and delivers user-configurable 9–12-bit resolution (0.5 °C to 0.0625 °C). It is used in system thermal management for PCs, industrial controllers, and power supply modules.

For engineers reviewing the STTS75M2F datasheet, STTS75M2F pinout, STTS75M2F application, or STTS75M2F equivalent, key selection considerations include its open-drain OS/INT alert output, 8-device I²C bus addressability via A0–A2 pins, 45 ms typical 9-bit conversion time, shutdown/one-shot low-power modes, and factory-calibrated operation without external components.

Technical Context

The STTS75M2F integrates a bandgap-based temperature sensor with a 9–12-bit delta-sigma ADC and a fully compliant I²C/SMBus 2-wire interface supporting up to 400 kHz clock rates. Its internal comparator logic continuously evaluates measured temperature against user-programmable TOS (overlimit) and THYS (hysteresis) registers.

It supports dual operating modes on the OS/INT pin: comparator mode (latching alert with configurable fault tolerance queue) and interrupt mode (edge-triggered event signaling). Power-up defaults enable standalone thermostat operation without host intervention, and the configuration register controls resolution, polarity, one-shot activation, and fault tolerance settings.

Key Specifications

Pinout & Package

STTS75M2F is available in MSOP8 (TSSOP8) package - 8-lead, thin shrink small outline, 3.0 mm × 3.0 mm body, 0.65 mm pitch - optimized for space-constrained PCB layouts in portable and industrial equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM75BIMM/NOPB and MAX31826ATD+, STTS75M2F uniquely combines I²C address flexibility, fault-tolerant comparator logic, and selectable 9–12-bit resolution - making it optimal for robust, multi-sensor thermal management in resource-constrained embedded systems.

Availability

STTS75M2F is available at Aetrix Electronics and suitable for server thermal management, industrial PLCs, DC-DC converter protection, and battery pack safety monitoring requiring stable component supply across extended product lifecycles.

Supply support for STTS75M2F 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The STTS75 series belongs to ST's precision analog sensor portfolio, engineered specifically for high-reliability thermal monitoring in systems demanding factory-calibrated accuracy, low power, and hardware-based thermal safety without host processor dependency.

FAQ

What is the default I²C address of STTS75M2F at power-up?

The STTS75M2F powers up with I²C address 1001000 (0x48 hex) when all address pins A2, A1, and A0 are grounded. This default allows immediate communication without address configuration, and the three pins support seven additional addresses (0x49–0x4F) for multi-device bus configurations.

How does the OS/INT pin function in comparator versus interrupt mode?

In comparator mode, OS/INT latches active when temperature exceeds TOS for a fault-tolerance-defined number of consecutive conversions and remains active until temperature falls below THYS. In interrupt mode, OS/INT pulses low for one SCL cycle upon each TOS breach, enabling edge-triggered host response without polling.

Can STTS75M2F operate without a microcontroller?

Yes - power-up defaults configure it as a standalone thermostat: 9-bit resolution, active-low OS/INT, and comparator mode enabled. With TOS/THYS preprogrammed via initial I²C write, it autonomously asserts OS/INT when thresholds are breached, requiring no ongoing host interaction.

What is the impact of resolution setting on conversion time and power consumption?

Higher resolution increases conversion time linearly: 9-bit = 45 ms, 10-bit = 90 ms, 11-bit = 180 ms, 12-bit = 350 ms (all typ). Quiescent current remains ~75 µA regardless of resolution; however, longer conversions extend active time, increasing average current in polled systems.