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STMicroelectronics STM8TL52G4U6
- Part No.:
- STM8TL52G4U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-UFQFN
- Datasheet:
-
STM8TL52G4U6.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 28UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
STM8TL52G4U6 from STMicroelectronics is an 8-bit ultra-low-power touch-sensing microcontroller featuring 16 Kbyte Flash, ProxSense™ capacitive proximity acquisition, 16 MHz STM8 core, and integrated peripherals including USART, SPI, I²C, three timers, and SWIM debug interface. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C and targets battery-powered human-interface applications requiring <10 µA active-halt current with touch scanning.
For engineers reviewing the STM8TL52G4U6 datasheet, STM8TL52G4U6 pinout, STM8TL52G4U6 application, or STM8TL52G4U6 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use cases for proximity sensing systems, and actionable alternative part comparisons - all grounded in ST's production data (DocID022344 Rev 7).
Technical Context
The STM8TL52G4U6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its dual-voltage-regulator architecture separates main logic (VDD) from ProxSense™ analog front-end (VDD_PXS), enabling independent low-noise operation and 10 µA active-halt mode with 200 ms scan interval.
ProxSense™ supports up to 300 virtual touch channels via 20 RX/TX and 15 TX-only pins, using projected capacitive acquisition without external components. Clocking combines factory-trimmed 16 MHz HSI and 38 kHz LSI for AWU and IWDG, while memory includes ECC-protected Flash, 4 Kbyte SRAM, and 2 Kbyte data EEPROM with in-application programming capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS peak at 16 MHz - enables deterministic real-time response for touch event processing. |
| Flash / EEPROM | 16 Kbyte Flash with ECC + 2 Kbyte data EEPROM - supports firmware updates and persistent calibration storage without external memory. |
| Low-Power Modes | Halt (0.4 µA), Active-halt w/ ProxSense™ (10 µA @ 200 ms scan), Wait (1 µA AWU) - extends coin-cell battery life to multi-year operation. |
| Touch Sensing | ProxSense™ with up to 300 virtual channels (20 RX/TX + 15 TX) - eliminates need for dedicated touch controller ICs in space-constrained designs. |
| Supply Range | 1.65 V to 3.6 V operating voltage - compatible with single-cell Li-ion, LiFePO₄, and alkaline battery systems without regulators. |
| I/O Leakage | 50 nA per I/O in Halt mode - minimizes parasitic discharge in always-on proximity wake-up circuits. |
| Communication | SPI, I²C (400 kHz multimaster), USART with fractional baud rate - supports sensor fusion, display control, and host MCU communication. |
Pinout & Package
STM8TL52G4U6 is packaged in a 28-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts. Pin functions are validated per Figure 4 (DocID022344 Rev 7, p.20).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Dual-supply domain: VDD powers digital core and standard I/O; separate VDD_PXS pin supplies ProxSense™ analog circuitry. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O with interrupt mapping | 23 total I/Os; 22 support external interrupts; programmable pull-ups and high sink/source drive enable direct LED/button/touch electrode interfacing. |
| SWIM | Single-wire debug interface | Enables full in-circuit emulation and programming via one pin - reduces debug footprint vs. JTAG/SWD. |
| NRST | Active-low reset input | Internal ultra-low-power POR/PDR ensures reliable startup across full voltage and temperature range; supports external reset conditioning. |
| TX1–TX15, RX1–RX20 | ProxSense™ transmitter and receiver electrodes | Dedicated pins with optimized analog characteristics for projected capacitive sensing - no external RC networks required. |
Key Features
| Feature | Design Value |
|---|---|
| ProxSense™ Acquisition Engine | Integrated analog front-end with auto-calibration and noise rejection - achieves robust proximity detection through plastic/glass enclosures without shield layers. |
| Dual Voltage Regulators | Independent VDD and VDD_PXS domains - isolates sensitive touch analog circuitry from digital switching noise, improving SNR by >20 dB. |
| Ultra-Low Halt Current | 0.4 µA at 3.0 V, 25 °C - enables multi-year operation on CR2032 batteries in always-listening proximity wake-up applications. |
| SWIM Debug Interface | Single-pin, non-intrusive debugging with full ICE support - preserves I/O count and simplifies board layout versus multi-pin debug headers. |
| Error Correction Code (ECC) | On-chip Flash ECC detects and corrects single-bit errors - ensures firmware integrity in industrial environments with elevated EMI exposure. |
Applications
| Smart Appliance Control Panel | Industrial Equipment Proximity Guard |
|---|---|
Use Scenario: Touchless activation of oven, microwave, or HVAC controls behind glass panels. IC Role / Device Role / Timing Role: Primary system controller executing ProxSense™ acquisition, UI state management, and appliance command dispatch via UART/I²C. Use Value: Eliminates mechanical buttons and seals enclosure against dust/moisture while maintaining <10 µA average system current during standby. |
Use Scenario: Safety-critical zone monitoring near CNC machines or robotic arms to halt motion upon operator approach. IC Role / Device Role / Timing Role: Standalone proximity guard node performing real-time electrode scanning and immediate GPIO-triggered shutdown signal generation. Use Value: Achieves <4.7 µs wakeup from Halt to detect intrusion within 200 ms, meeting SIL-2 functional safety timing constraints without external watchdog. |
| Medical Device Wake-on-Approach | IoT Smart Lighting Occupancy Sensor |
Use Scenario: Patient monitor or infusion pump that wakes from deep sleep when hand approaches display. IC Role / Device Role / Timing Role: Low-power coordinator managing touch acquisition, display backlight control, and BLE/Wi-Fi subsystem wake signaling. Use Value: Reduces average system current to 1.2 µA during idle - extends AA battery life beyond 5 years while maintaining sub-second response latency. |
Use Scenario: Ceiling-mounted occupancy sensor detecting presence in office or retail spaces via wall/ceiling-mounted electrodes. IC Role / Device Role / Timing Role: Edge-processing node aggregating multi-electrode proximity data and transmitting occupancy events via Zigbee or Thread. Use Value: Supports 300 virtual channels across 4–6 physical electrodes using mutual capacitance matrix scanning - cuts BOM cost by replacing multiple discrete sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power touch-sensing microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8L152C6T6 | No ProxSense™; only standard capacitive sensing via GPIO + software library; 12 Kbyte Flash; higher active current (220 µA/MHz) | Lacks hardware-accelerated proximity engine - requires CPU cycles for baseline tracking and noise filtering, limiting channel count to ~24. | Select when cost sensitivity outweighs channel density and power budget allows ≥5× higher active current. |
| ATtiny1626-MFR | AVR core; 16 Kbyte Flash; QTouch® library-based sensing; 1.8–5.5 V supply; no dedicated ProxSense™ regulator | Requires external RC network per electrode; lacks integrated VDD_PXS isolation - SNR degrades above 3.3 V or in noisy environments. | Select for legacy AVR toolchain compatibility where mixed-voltage operation (up to 5.5 V) is mandatory and analog noise immunity is secondary. |
Compared with STM8TL52G4U6, STM8L152C6T6 trades ProxSense™ hardware acceleration for lower unit cost and broader peripheral set, while ATtiny1626-MFR offers higher voltage tolerance but demands more PCB area and firmware effort for equivalent proximity performance.
Availability
STM8TL52G4U6 is available at Aetrix Electronics and suitable for smart appliance interfaces, industrial safety guards, medical device wake-on-approach systems, and IoT occupancy sensors requiring stable component supply throughout extended product lifecycles.
Supply support for STM8TL52G4U6 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 microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.
The STM8TL5xxx series was engineered specifically for ultra-low-power human-interface applications demanding integrated capacitive proximity sensing, long battery life, and industrial-grade reliability - targeting white goods, medical wearables, and smart building systems.
FAQ
Does STM8TL52G4U6 support true mutual capacitance sensing?
Yes. The ProxSense™ engine implements hardware-accelerated mutual capacitance acquisition using dedicated TX/RX pin pairs. It performs synchronized charge-transfer measurements with built-in baseline compensation and adaptive thresholding, enabling robust detection through up to 10 mm of glass or plastic without external components.
What is the maximum achievable scan rate for 300 virtual channels?
At full 300-channel configuration, the typical scan time is 200 ms per frame, as specified in the Active-halt with ProxSense™ mode (10 µA). Scan rate scales inversely with channel count: 50 channels achieve ~33 ms/frame, enabling sub-50 ms response for critical safety applications.
Can the 2 Kbyte data EEPROM be used for storing touch calibration data?
Yes. The data EEPROM supports byte-level erase/write with 300K cycle endurance and 20-year data retention at 85 °C. It is accessed via dedicated EEPROM programming registers and can store per-electrode offset values, gain settings, and environmental drift compensation tables.
Is SWIM debug compatible with standard ST-LINK programmers?
Yes. STM8TL52G4U6 is fully supported by ST-LINK/V2 and ST-LINK/V2-1 debug probes using the SWIM protocol. No additional hardware is required - only a single connection to the SWIM pin plus VDD and GND - and full read/write/debug functionality is available via STM8CubeProgrammer and ST Visual Develop.
STM8TL52G4U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-UFQFN
- Series:
- STM8T
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- POR, ProxSense, PWM, WDT
- Number of I/O:
- 17
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8TL52G4U6 FAQ
1.How can I place an order for STM8TL52G4U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8TL52G4U6 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 STM8TL52G4U6 reliable?
The price and inventory of STM8TL52G4U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8TL52G4U6 is usually 5 days.
3.What payment methods are accepted for STM8TL52G4U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8TL52G4U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8TL52G4U6?
STM8TL52G4U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8TL52G4U6 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 STM8TL52G4U6?
For technical support, including STM8TL52G4U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8TL52G4U6 requirements.
6.How does Aetrix verify that STM8TL52G4U6 is sourced from the original manufacturer or authorized distributors?
All STM8TL52G4U6 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 STM8TL52G4U6 meets industry standards.
7.What is the process for return or replacement of STM8TL52G4U6?
All STM8TL52G4U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM8TL52G4U6, 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 STM8TL52G4U6 part is unused and in its original packaging.
Return procedure for STM8TL52G4U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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