STMicroelectronics STEVAL-MKI141V1

Overview

STEVAL-MKI141V1 from STMicroelectronics is an evaluation adapter board for the HTS221 digital humidity and temperature sensor, designed to plug directly into a standard DIL24 socket with I²C interface only. It provides full HTS221 pinout, on-board decoupling (100 nF + 2.2 µF), RoHS compliance, and seamless compatibility with the STEVAL-MKI109V2 motherboard for PC-based sensor evaluation using Unico GUI.

For engineers reviewing the STEVAL-MKI141V1 datasheet, STEVAL-MKI141V1 pinout, STEVAL-MKI141V1 application, or STEVAL-MKI141V1 equivalent, this adapter enables rapid prototyping of environmental sensing subsystems in industrial monitoring, portable medical devices, and smart home nodes-where compact MEMS sensor integration and I²C-level validation are critical.

Technical Context

The board implements a passive breakout architecture with no active signal conditioning or level shifting-only direct HTS221 pin mapping to DIL24 footprint. Power delivery is simplified via single VDD input (1.7–3.6 V) with dual-stage decoupling (100 nF ceramic + 2.2 µF tantalum) adjacent to the sensor's VDD pin.

It relies entirely on external host control: the connected STEVAL-MKI109V2 motherboard supplies clocked I²C communication (SCL/SDA), power sequencing, and firmware-driven data acquisition. No onboard microcontroller or firmware resides on the STEVAL-MKI141V1 itself.

Key Specifications

Availability

STEVAL-MKI141V1 is available at Aetrix Electronics and suitable for environmental sensor prototyping, IoT node development, and educational lab setups requiring stable component supply and immediate plug-and-play sensor evaluation capability.

Supply support for STEVAL-MKI141V1 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 markets.

This board belongs to ST's STEVAL (ST Evaluation) product line-engineered specifically to accelerate MEMS sensor evaluation by providing standardized, motherboard-integrated, socket-based interfaces for rapid system-level testing.

FAQ

Does STEVAL-MKI141V1 include an onboard microcontroller or firmware?

No. The board contains only passive components and the HTS221 sensor. All processing, I²C timing, and data readout are handled externally by the STEVAL-MKI109V2 motherboard's 32-bit microcontroller and associated Unico GUI software stack.

Can STEVAL-MKI141V1 be used without the STEVAL-MKI109V2 motherboard?

Yes, but only with external I²C master hardware and custom firmware. The board exposes raw SCL/SDA/VDD/GND pins via JP1/JP2 headers; however, no pull-up resistors or voltage translation are included, requiring user-provided I²C infrastructure.

What is the operating voltage range supported by this adapter board?

The board supports the HTS221's native supply range: 1.7 V to 3.6 V DC applied to the VDD pin. It does not include voltage regulation or level-shifting circuitry, so the host system must supply clean, within-spec voltage directly.

Is STEVAL-MKI141V1 still in active production?

STMicroelectronics has marked STEVAL-MKI141V1 as obsolete (per DocID026083 Rev 1, March 2014). Aetrix Electronics maintains limited legacy stock for design continuity and replacement needs, with full traceability and documentation support.