STMicroelectronics STEVAL-MKI203V1K

Overview

STEVAL-MKI203V1K from STMicroelectronics is a ready-to-use temperature probe evaluation kit built around the STCN75 digital temperature sensor IC and thermal watchdog, featuring ±0.5 °C accuracy from −25 °C to +100 °C, I²C interface (SCL/SDA), programmable over-temperature interrupt (INT1/INT2), and ultra-compact 5 mm × 5 mm × 0.8 mm probe form factor for minimal thermal coupling in precision thermal monitoring applications.

For engineers reviewing the STEVAL-MKI203V1K datasheet, STEVAL-MKI203V1K pinout, STEVAL-MKI203V1K application, or STEVAL-MKI203V1K equivalent, this kit enables rapid validation of STCN75-based thermal sensing in embedded systems, industrial process probes, and PC-connected environmental monitoring setups using the Unico GUI or custom firmware on the STEVAL-MKI109V3 motherboard.

Technical Context

The kit implements a two-board architecture: the STEVAL-MKI203V1K probe board hosts the STCN75 in a DFN8 package with decoupling capacitors (1 μF + 100 nF) on VDD, while the STEVAL-MKIGIBV1 adapter provides full DIL24 socket compatibility and routes SCL, SDA, INT1, INT2, VDD, and Vdd_IO to the motherboard. The STCN75 operates from 2.7 V to 5.5 V and supports 12-bit temperature resolution with programmable fault queue and hysteresis.

It interfaces exclusively via I²C at standard/fast mode (100/400 kHz), with fixed slave address 0x48 (A2=A1=A0=0) and dual open-drain interrupt outputs supporting thermal event detection without host polling. No SPI or analog output capability is present.

Key Specifications

Availability

STEVAL-MKI203V1K is available at Aetrix Electronics and suitable for thermal validation, embedded sensor prototyping, and PC-based environmental monitoring requiring stable component supply and immediate out-of-box usability with Unico GUI.

Supply support for STEVAL-MKI203V1K 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, designing and manufacturing microcontrollers, sensors, power ICs, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

This kit belongs to ST's MEMS & Sensors Evaluation Kit product line, engineered specifically to accelerate development of thermal, inertial, and environmental sensing subsystems using ST's validated signal chain components and GUI-based configuration tools.

FAQ

Does STEVAL-MKI203V1K include the STEVAL-MKI109V3 motherboard?

No. The STEVAL-MKI203V1K kit contains only the temperature probe board (STEVAL-MKI203V1K) and the DIL24 adapter board (STEVAL-MKIGIBV1). The STEVAL-MKI109V3 motherboard must be purchased separately to enable USB-to-I²C bridging and PC communication via the Unico GUI.

What is the role of the 0 Ω resistors (R1, R2) and DNM resistor (R3) on the probe board?

R1 and R2 are zero-ohm jumpers used to configure INT1/INT2 routing and SDO/SAO functionality per application needs; R3 is marked "DNM" (Do Not Mount) and reserved for optional ADC input path modification - no population required for standard STCN75 operation.

Can STEVAL-MKI203V1K operate independently without a motherboard?

No. It lacks onboard MCU, USB interface, or power regulation. It requires connection via flat cable to STEVAL-MKIGIBV1, then to STEVAL-MKI109V3 (or compatible STM32-based host), which supplies power, clocks, and I²C master control.

Is the STCN75 on this board reprogrammable for different temperature thresholds?

Yes. The STCN75's over-temperature (TOS) and hysteresis (THYST) registers are writable via I²C. Thresholds can be set in 0.0625 °C steps across −55 °C to +125 °C range, enabling field-configurable thermal trip points without hardware changes.