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STMicroelectronics STEVAL-MKI141V2
- Part No.:
- STEVAL-MKI141V2
- Manufacturer:
- STMicroelectronics
- Category:
- Expansion Boards, Daughter Cards
- Package:
- Datasheet:
-
STEVAL-MKI141V2.pdf
- Description:
- DIL24 ADAPTER BOARD HTS221
- Quantity:
- Payment:
- Shipping:
Inventory:4,229
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Product details
Overview
STEVAL-MKI141V2 from STMicroelectronics is an adapter board for the HTS221 digital humidity and temperature sensor, providing full pinout access via a standard DIL24 socket. It supports both SPI and I²C interfaces, includes on-board decoupling capacitors (100 nF and 2.2 µF), and is designed for rapid prototyping and evaluation in user-defined systems.
For engineers reviewing the STEVAL-MKI141V2 datasheet, STEVAL-MKI141V2 pinout, STEVAL-MKI141V2 application, or STEVAL-MKI141V2 equivalent, this board enables direct integration with the STEVAL-MKI109V2 motherboard, firmware-controlled sensor interrogation via Unico GUI, and thermal-isolated measurement setup using 20–30 cm interconnect cables.
Technical Context
The board implements a passive breakout interface between the HTS221 MEMS sensor and external host systems. It routes all 6 active HTS221 pins - VDD, GND, SCL, SDA, CS, and INT - to a dual-row 12-pin header (JP1/JP2), preserving native signal integrity without level-shifting or buffering.
No microcontroller or firmware resides on the STEVAL-MKI141V2 itself; it functions strictly as a mechanical and electrical adapter. Full functionality requires pairing with the STEVAL-MKI109V2 motherboard running eMotion v3.0.7+ firmware and Unico GUI v3.0.1.6beta+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Form Factor | DIL24 socket-compatible adapter board (no onboard MCU) |
| Supported Sensor | HTS221 - digital relative humidity & temperature sensor with I²C/SPI |
| Interface Support | Full pinout for both I²C (SCL/SDA) and SPI (CS/SDA/SCL) modes |
| Power Decoupling | 100 nF ceramic + 2.2 µF tantalum on VDD line for stable sensor supply |
| Thermal Isolation Guidance | 20–30 cm cable length recommended between this board and STEVAL-MKI109V2 to avoid thermal coupling |
| Compatibility | Fully interoperable with STEVAL-MKI109V2 motherboard only (not standalone) |
Availability
STEVAL-MKI141V2 is available at Aetrix Electronics and suitable for humidity sensing evaluation, embedded environmental monitoring prototyping, and MEMS sensor reference design validation requiring stable component supply and documented ST ecosystem integration.
Supply support for STEVAL-MKI141V2 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 board belongs to ST's STEVAL (ST Evaluation) series - purpose-built adapter and reference platforms that accelerate development around ST's MEMS and sensor portfolio, especially for rapid lab-based characterization and firmware integration.
FAQ
Does STEVAL-MKI141V2 include an onboard microcontroller?
No. The board contains no processing element. It is a passive adapter that breaks out the HTS221 sensor pins to a DIL24 footprint and headers. All communication and data processing must be handled externally - specifically by the STEVAL-MKI109V2 motherboard's 32-bit microcontroller and associated firmware.
What firmware and GUI versions are required to use this board?
The STEVAL-MKI109V2 motherboard must run eMotion firmware v3.0.7 or later. The PC-side Unico GUI must be version 3.0.1.6beta or later. Earlier versions lack HTS221 register mapping and calibration support, resulting in failed initialization or inaccurate readings.
Can STEVAL-MKI141V2 be used without STEVAL-MKI109V2?
No. The board lacks power regulation, clock generation, or host interface circuitry. It has no USB, UART, or debug connectivity. It is not functional as a standalone device and requires the STEVAL-MKI109V2 motherboard to provide power, clock, I/O bridging, and host communication.
Why is cable length specified for connection to STEVAL-MKI109V2?
Because the HTS221 is highly sensitive to local thermal gradients, ST specifies 20–30 cm cables to physically separate the sensor board from heat-generating components (e.g., MCU, regulators) on the STEVAL-MKI109V2. Shorter cables risk thermal conduction that biases humidity and temperature measurements.
STEVAL-MKI141V2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Platform:
- Professional MEMS Tool
- Type:
- Sensor
- Function:
- Humidity, Temperature
- Utilized IC / Part:
- HTS221
- Contents:
- Board(s)
STEVAL-MKI141V2 FAQ
1.How can I place an order for STEVAL-MKI141V2 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-MKI141V2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STEVAL-MKI141V2 reliable?
The price and inventory of STEVAL-MKI141V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-MKI141V2 is usually 5 days.
3.What payment methods are accepted for STEVAL-MKI141V2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-MKI141V2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-MKI141V2?
STEVAL-MKI141V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-MKI141V2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STEVAL-MKI141V2?
For technical support, including STEVAL-MKI141V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-MKI141V2 requirements.
6.How does Aetrix verify that STEVAL-MKI141V2 is sourced from the original manufacturer or authorized distributors?
All STEVAL-MKI141V2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STEVAL-MKI141V2 meets industry standards.
7.What is the process for return or replacement of STEVAL-MKI141V2?
All STEVAL-MKI141V2 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-MKI141V2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STEVAL-MKI141V2 part is unused and in its original packaging.
Return procedure for STEVAL-MKI141V2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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