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STM8T143AU61TTR

Manufacturer Part Number:
STM8T143AU61TTR
Manufacturer / Brand
STMicroelectronics
Part of Description:
IC MCU SENSOR TOUCH/PROX 8UFDFPN
Datasheets:
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 6192 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number STM8T143AU61TTR
Manufacturer / Brand STMicroelectronics
Stock Quantity 6192 pcs Stock
Category Integrated Circuits (ICs) > Interface - Sensor, Capacitive Touch
Description IC MCU SENSOR TOUCH/PROX 8UFDFPN
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ STM8T143AU61TTR Datasheets STM8T143AU61TTR Details PDF
STM8T143AU61TTR Details PDF for FR.pdf
STM8T143AU61TTR Details PDF for IT.pdf
STM8T143AU61TTR Details PDF for ES.pdf
STM8T143AU61TTR Details PDF for DE.pdf
STM8T143AU61TTR Details PDF for KR.pdf
Voltage - Supply 2.3V ~ 5.5V
Type Buttons
Supplier Device Package 8-UFDFPN (2x3)
Series -
Resolution -
Proximity Detection Yes
Package / Case 8-UFDFN Exposed Pad
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C
Number of Inputs 1
Mounting Type Surface Mount
LED Driver Channels -
Interface -
Current - Supply 60µA
Base Product Number STM8T143

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges: (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



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STM8T143AU61TTR Product Details:

The STM8T143AU61TTR is a compact and versatile integrated circuit (IC) designed by STMicroelectronics for capacitive touch button applications. As an interface sensor, this device offers a reliable and robust solution for seamless touch-based user interactions.

Functionality-wise, the STM8T143AU61TTR is a capacitive touch buttons IC that can detect touch input on a single channel. It also features proximity detection, enabling users to interact with the device without direct contact. This makes it ideal for applications where touch-based control is preferred, such as household appliances, consumer electronics, and industrial equipment.

The device is encapsulated in a small 8-UFDFPN (2x3) package, which is RoHS-compliant and lead-free, ensuring it meets the latest environmental standards. The QFN8 package with an exposed pad provides efficient thermal management and easy integration into various circuit designs.

Key specifications of the STM8T143AU61TTR include an operating temperature range of -40°C to 85°C, a supply voltage of 2.3V to 5.5V, and a maximum supply current of 60A. These specifications make the IC suitable for a wide range of applications and environments, from industrial automation to consumer electronics.

The primary advantages of the STM8T143AU61TTR include its compact size, low power consumption, and robust capacitive touch sensing capabilities. This makes it an ideal choice for applications where space and power efficiency are critical, such as portable devices, home appliances, and industrial controls.

In terms of compatibility, the STM8T143AU61TTR is a standalone solution that can be easily integrated into various electronic systems. It is available in a Tape & Reel (TR) packaging format, which facilitates automated assembly processes and streamlines manufacturing workflows.

Regarding equivalent or alternative models, the STM8T143AU61TTR may be comparable to other capacitive touch button ICs from STMicroelectronics, such as the STM8T143AU61TR and the STM8T143AU61QFN. These devices may offer similar functionalities and specifications, catering to the specific needs of different applications and design requirements.

STM8T143AU61TTR Image
STM8T143AU61TTR (1)

STM8T143AU61TTR Key Technical Attributes

Manufacturer Part Number: STM8T143AU61TTR

Manufacturer: STMicroelectronics

Main Category: Integrated Circuits (ICs)

STM8T143AU61TTR Packing Size

Package Type: 8-UFDFPN (2x3)

Encapsulation: QFN8

Package: Tape & Reel (TR)

Moisture Sensitivity Level (MSL): 3 (168 Hours)

STM8T143AU61TTR Application

Designed for use in devices needing capacitive touch button functionality including consumer electronics like home appliances, handheld gadgets, and touch-enabled devices.

STM8T143AU61TTR Features

The STM8T143AU61TTR from STMicroelectronics is specialized in capacitive touch sensing technology which accommodates a single input touch button. Operating within a voltage range of 2.3 V to 5.5 V, it offers stable performance across a broad range of supply voltages, making it suitable for various electronic applications. Furthermore, it supports proximity detection, adding versatility to its usability in interfaces where non-contact user interaction is preferred. The operating temperature specification of -40°C to 85°C ensures reliability under diverse environmental conditions.

STM8T143AU61TTR Quality and Safety Features

This component adheres to RoHS compliance, indicating that it is manufactured without harmful substances like lead, ensuring environmental safety and quality. The device's encapsulation in a QFN8 package contributes to enhanced thermal characteristics and electrical reliability.

STM8T143AU61TTR Compatibility

Suited for integration into various consumer electronics requiring capacitive touch functionality thanks to its compact size (8-UFDFPN 2x3) and capability to handle a wide range of operating temperatures.

STM8T143AU61TTR Datasheet PDF

For the most detailed and authoritative specifications and operational guidelines for the STM8T143AU61TTR, we encourage our customers to download the datasheet PDF directly from our website on the product page.

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IC-Components is recognized as a premier distributor for STMicroelectronics products. We assure quality and authenticity with every component. Optimize your purchase experience by getting a quote directly from our website today, where trust and premium service meet.

Frequently Asked Questions

What are the key design constraints when integrating the STM8T143AU61TTR into a low-power portable device with fluctuating supply voltage?
The STM8T143AU61TTR operates within a 2.3 V to 5.5 V supply range, making it suitable for battery-powered applications, but its 60 µA typical supply current during active sensing requires careful power budgeting. Engineers must ensure stable voltage regulation—especially during brownout conditions—since noise or droop below 2.3 V can cause erratic touch detection or reset behavior. Additionally, the exposed pad in the 8-UFDFPN (2x3) package must be properly grounded to maintain signal integrity and thermal stability, which is critical in compact, high-density layouts common in portable designs.
Can the STM8T143AU61TTR be used reliably in industrial environments with high electromagnetic interference (EMI), and what layout practices mitigate risks?
While the STM8T143AU61TTR supports an operating temperature range of -40°C to 85°C, making it viable for industrial use, its capacitive sensing performance is sensitive to EMI. To ensure reliability, maintain a solid ground plane beneath the sensor electrodes, route sensing traces away from high-speed digital lines, and use guard rings connected to ground. The exposed pad must be soldered to a low-impedance ground pour to reduce noise coupling. Without these precautions, false triggers or reduced sensitivity may occur in electrically noisy environments.
Is the STM8T143AU61TTR suitable for proximity detection in outdoor or humid conditions, and what design modifications are necessary?
The STM8T143AU61TTR supports proximity detection, but its performance degrades in high-humidity or wet environments due to parasitic capacitance changes. For outdoor use, apply a conformal coating over the sensor area and ensure the electrode is covered with a non-conductive, hydrophobic material (e.g., polycarbonate) of consistent thickness. Avoid metal enclosures or conductive overlays that can shunt the electric field. Calibration during power-up helps compensate for environmental drift, but sustained condensation may still cause false detections.
What are the risks of replacing a legacy mechanical switch with the STM8T143AU61TTR in a safety-critical control panel, and how can they be mitigated?
Replacing mechanical switches with the STM8T143AU61TTR introduces risks related to software lockup, EMI-induced false triggers, or power glitches. Since it lacks built-in watchdog or hardware debounce, implement external monitoring (e.g., a supervisory IC) and periodic self-test routines in the host MCU. Use redundant sensing or combine with a physical fail-safe mechanism in safety-critical applications. Additionally, validate long-term reliability under expected environmental stressors, as capacitive sensors are more susceptible to drift over time compared to mechanical alternatives.
How does the moisture sensitivity level (MSL 3) of the STM8T143AU61TTR impact assembly and storage in high-volume manufacturing?
The STM8T143AU61TTR has an MSL 3 rating, meaning it can be exposed to ambient conditions for up to 168 hours after removal from its dry pack before requiring baking. In high-volume production, this necessitates strict moisture control: use dry storage cabinets, monitor floor life, and avoid prolonged exposure during pick-and-place operations. Failure to comply may result in popcorning during reflow, especially given the thin 8-UFDFN package. Always follow IPC/JEDEC J-STD-033 guidelines for handling.
Can the STM8T143AU61TTR be directly interfaced with a 1.8 V microcontroller, or is level shifting required?
No, the STM8T143AU61TTR cannot be directly interfaced with a 1.8 V MCU. Its I/O pins are not 5-V tolerant below 2.3 V and require a minimum supply of 2.3 V to operate. If your system uses a 1.8 V logic MCU, you must use a bidirectional level shifter on the communication lines (if using I²C or GPIO feedback) or power the STM8T143AU61TTR from a separate 3.3 V rail. Direct connection risks damage to the lower-voltage MCU and unreliable signal interpretation.
What are the trade-offs when migrating from a competing capacitive touch IC like the AT42QT1010 to the STM8T143AU61TTR?
Migrating from the AT42QT1010 to the STM8T143AU61TTR offers advantages in integration (built-in proximity detection) and wider voltage range (2.3–5.5 V vs. 2.5–5.5 V), but requires attention to package differences: the STM8T143AU61TTR uses an 8-UFDFN with an exposed pad, demanding better thermal and grounding design. Additionally, the STM8T143AU61TTR has a higher supply current (60 µA vs. ~20 µA), which may affect battery life in ultra-low-power applications. Firmware must also be adapted, as configuration methods and sensitivity tuning differ significantly between the two devices.
How should the electrode design be optimized for the STM8T143AU61TTR to ensure consistent touch response across varying overlay materials?
Electrode design for the STM8T143AU61TTR must account for overlay thickness and dielectric constant. Use a solid copper pad (typically 8–15 mm in diameter) with no gaps, and maintain a consistent distance between the electrode and the user’s touch point (recommended overlay thickness: 0.5–3 mm). Avoid sharp corners or narrow traces, which can create field distortions. For plastic overlays, ensure uniform thickness and avoid conductive paints or metallic decorations near the sensor area, as they can cause false triggers or reduce sensitivity.
What long-term reliability concerns should be considered when deploying the STM8T143AU61TTR in consumer appliances with extended lifecycle requirements?
Over long-term use, the STM8T143AU61TTR may experience drift in baseline capacitance due to temperature cycling, humidity absorption, or material aging of the overlay. This can lead to reduced sensitivity or false detections. To mitigate, implement periodic auto-calibration routines in firmware and avoid materials prone to outgassing or moisture retention near the sensor. Additionally, ensure the PCB assembly process minimizes flux residue under the package, which can cause leakage currents over time. Field data from similar deployments should inform maintenance schedules or design refreshes.

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