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STMicroelectronics STM8TL53G4U6
- Part No.:
- STM8TL53G4U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-UFQFN
- Datasheet:
-
STM8TL53G4U6.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 28UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
STM8TL53G4U6 from STMicroelectronics is an 8-bit ultra-low-power touch-sensing microcontroller featuring 16 KB Flash, 4 KB RAM, ProxSense™ capacitive proximity acquisition (up to 300 channels), and integrated dual-mode voltage regulation for touch and core domains. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C and targets battery-powered human-interface applications such as appliance control panels and smart home sensors.
For engineers reviewing the STM8TL53G4U6 datasheet, STM8TL53G4U6 pinout, STM8TL53G4U6 application, or STM8TL53G4U6 equivalent, key selection criteria include its 10 µA Active-halt with ProxSense™ current (200 ms scan interval), 4.7 µs Halt-mode wakeup, 16 MHz STM8 Harvard core, 23 I/Os with programmable pull-ups, and UFQFPN28 package compatibility with touch-optimized pin mapping.
Technical Context
The STM8TL53G4U6 integrates a dedicated ProxSense™ analog front-end with separate TX/RX channel routing, dual voltage regulators (core and ProxSense), and hardware-accelerated capacitive sensing logic - enabling true single-chip proximity detection without external controllers. Its clock system includes factory-trimmed 16 MHz HSI and 38 kHz LSI oscillators, with independent watchdog, window watchdog, and auto-wakeup unit supporting robust low-power operation.
Interrupt handling uses a nested controller with software priority and up to 22 external sources; memory subsystem includes ECC-protected Flash, 2 KB data EEPROM, and flexible read/write protection. Communication peripherals comprise USART (fractional baud), SPI, and Fast I²C (400 kHz), all accessible in low-power modes via SWIM debug interface.
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 scanning and sensor fusion. |
| Flash / RAM | 16 KB Flash (with ECC and in-application programming) + 4 KB SRAM - supports firmware updates and runtime parameter storage in embedded systems. |
| Low-Power Modes | Halt (0.4 µA), Active-halt with ProxSense™ (10 µA @ 200 ms scan), Wait (1 µA with AWU) - extends battery life in always-on proximity detection. |
| ProxSense™ Channels | Up to 300 virtual channels (20 RX + 15 TX physical pins) - allows complex multi-zone touch/proximity interfaces with minimal PCB routing. |
| Supply Range | 1.65 V to 3.6 V operating voltage - compatible with coin cells (e.g., CR2032), Li-ion single-cell, and regulated 3.3 V rails. |
| I/O Count | 23 GPIOs, 22 mappable to external interrupts - supports direct button matrix scanning, LED drivers, and system control signaling. |
| Communication | SPI, I²C (400 kHz multimaster), USART with fractional baud - enables seamless integration with displays, sensors, and host MCUs. |
Pinout & Package
STM8TL53G4U6 is housed in a 28-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN28) package, 7 × 7 mm, 0.5 mm pitch, with exposed thermal pad. Pin functions are optimized for touch sensing: dedicated ProxSense™ TX/RX pins support differential capacitive measurement, while VDD_PXS and VSS_PXS provide isolated analog supply for noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital Core Supply | 1.65–3.6 V main power for CPU, timers, and digital peripherals; decoupling required near pin. |
| VSS | Digital Ground | Reference return path for digital circuitry; must be connected to low-impedance ground plane. |
| VDD_PXS | ProxSense™ Analog Supply | Independent 1.65–3.6 V rail for capacitive sensing circuitry; improves SNR and reduces coupling noise. |
| VSS_PXS | ProxSense™ Analog Ground | Separate analog ground for ProxSense™; requires star-point connection to VSS to avoid ground bounce. |
| PA0–PA7 | General-purpose I/O | 8-bit port with programmable pull-ups; PA0–PA3 configurable as ProxSense™ TX, PA4–PA7 as RX. |
| PB0–PB7 | General-purpose I/O | 8-bit port supporting external interrupts; PB0–PB3 usable as additional ProxSense™ TX/RX channels. |
| PC0–PC7 | General-purpose I/O | 8-bit port with high sink/source capability; PC0–PC6 support touch sensing; PC7 is NRST input. |
| SWIM | Single-Wire Debug Interface | Asynchronous serial interface for programming and real-time debugging using ST-LINK tools. |
Key Features
| Feature | Design Value |
|---|---|
| ProxSense™ Acquisition Engine | Hardware-accelerated capacitive sensing with automatic baseline compensation and noise rejection - eliminates need for external ADC or DSP. |
| Dual Voltage Regulation | Separate core (VDD) and ProxSense™ (VDD_PXS) regulators - isolates analog sensing domain from digital switching noise. |
| Ultra-Fast Halt Wakeup | 4.7 µs from Halt mode to first instruction execution - enables rapid response to touch events while maintaining sub-µA quiescent current. |
| Data EEPROM Emulation | 2 KB of Flash configured as EEPROM with wear leveling and error correction - stores calibration data and user settings reliably. |
| SWIM Debug Interface | Single-pin, non-intrusive in-circuit emulation and programming - simplifies production programming and field firmware updates. |
Applications
| Appliance Control Panel | Smart Home Occupancy Sensor |
|---|---|
Use Scenario: Touch-enabled oven, microwave, or washing machine control interface with gesture-free proximity wake-up. IC Role / Device Role / Timing Role: Primary MCU managing capacitive keys, display backlight, buzzer, and safety interlocks; ProxSense™ detects hand approach before touch. Use Value: Eliminates mechanical buttons, reduces front-panel sealing complexity, and enables low-power "instant-on" UX with <10 µA active-halt current. |
Use Scenario: Wall-mounted motionless occupancy detector for lighting or HVAC control in offices or residential spaces. IC Role / Device Role / Timing Role: Standalone proximity node performing continuous 200-ms scan cycles, local decision logic, and wireless trigger output via UART or GPIO. Use Value: Achieves >1-year battery life on CR2032 using Halt mode between scans and 4.7 µs wakeup latency for immediate response. |
| Interactive Kiosk Front Panel | Industrial Human-Machine Interface (HMI) |
Use Scenario: Public information kiosk with glove-compatible proximity activation and touch feedback in dusty or humid environments. IC Role / Device Role / Timing Role: Dedicated touch controller interfacing with host ARM processor via UART/I²C; handles raw sensor data and debouncing. Use Value: Supports projected capacitive sensing through thick glass (up to 10 mm), immune to water droplets and ESD per IEC 61000-4-2 Level 4. |
Use Scenario: Embedded panel controller for machinery with IP65-rated enclosure requiring sealed, no-aperture UI. IC Role / Device Role / Timing Role: Real-time touch coordinator managing up to 300 virtual zones across multiple PCB layers; communicates status via SPI to main controller. Use Value: Reduces BOM cost by replacing discrete touch ICs and FPGA-based solutions while delivering deterministic 20-ms scan-to-interrupt latency. |
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™ hardware; relies on software-based capacitive sensing using standard ADC and timers. | Limited to ~20 touch channels; higher CPU load and longer scan time; lacks dedicated analog isolation. | Select when cost sensitivity outweighs channel count and analog performance requirements. |
| ATtiny1616-MFR | AVR core with CFD (Capacitive Touch) peripheral; 16-channel native support; no integrated ProxSense™-grade noise rejection. | Requires external RC networks for extended range; no dual-regulator architecture for analog domain isolation. | Prefer for simple button/slider interfaces where ST's ProxSense™ advanced features (e.g., mutual capacitance, baseline drift compensation) are unnecessary. |
Compared with STM8L152C6T6 and ATtiny1616-MFR, the STM8TL53G4U6 delivers superior channel density, lower active power during sensing, and hardware-enforced analog/digital separation - making it uniquely suited for high-reliability, multi-zone proximity applications demanding long battery life and robust EMC performance.
Availability
STM8TL53G4U6 is available at Aetrix Electronics and suitable for appliance control panels, smart home occupancy sensors, interactive kiosks, and industrial HMIs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and voltage ranges.
Supply support for STM8TL53G4U6 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-grade components since 1987.
The STM8TL5xxx series was developed specifically for ultra-low-power human-interface applications, combining touch sensing, mixed-signal peripherals, and robust low-power architecture to replace mechanical switches and discrete proximity solutions in consumer and industrial markets.
FAQ
What is the maximum number of physical ProxSense™ pins supported on STM8TL53G4U6?
The STM8TL53G4U6 supports 20 physical receiver (RX) pins and 15 physical transmitter (TX) pins, mapped across GPIO ports PA, PB, and PC. These can be combined to implement up to 300 virtual touch/proximity channels using mutual capacitance techniques, as confirmed in Section 3.18 of the datasheet and Figure 1 of the reference manual RM0312.
Does STM8TL53G4U6 require external crystals for ProxSense™ operation?
No. The ProxSense™ subsystem operates autonomously using the internal 38 kHz low-consumption RC oscillator (LSI), which drives both the auto-wakeup unit and ProxSense™ timing. No external crystal or resonator is needed for basic proximity detection, though optional external clocks may be used for enhanced timing accuracy in specialized configurations.
Can the 2 KB data EEPROM be used for storing calibration coefficients during field operation?
Yes. The device provides dedicated data EEPROM functionality within Flash memory, supporting byte/word erase and write operations under firmware control. ST's Touch Sensing Library (TSL) v5.5+ includes validated routines for safe, wear-leveled storage of baseline offsets and sensitivity parameters in this area, with documented endurance of 100k cycles per sector.
Is SWIM debugging supported in all low-power modes?
SWIM is fully operational in Run, Wait, and Active-halt modes, allowing real-time variable inspection and breakpoint setting. However, SWIM communication is suspended in Halt mode; debug access resumes automatically upon wakeup, with full register and memory visibility restored within 4.7 µs - verified in UM0470 and the STM8 SWIM protocol specification.
STM8TL53G4U6 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:
STM8TL53G4U6 FAQ
1.How can I place an order for STM8TL53G4U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8TL53G4U6 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 STM8TL53G4U6 reliable?
The price and inventory of STM8TL53G4U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8TL53G4U6 is usually 5 days.
3.What payment methods are accepted for STM8TL53G4U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8TL53G4U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8TL53G4U6?
STM8TL53G4U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8TL53G4U6 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 STM8TL53G4U6?
For technical support, including STM8TL53G4U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8TL53G4U6 requirements.
6.How does Aetrix verify that STM8TL53G4U6 is sourced from the original manufacturer or authorized distributors?
All STM8TL53G4U6 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 STM8TL53G4U6 meets industry standards.
7.What is the process for return or replacement of STM8TL53G4U6?
All STM8TL53G4U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM8TL53G4U6, 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 STM8TL53G4U6 part is unused and in its original packaging.
Return procedure for STM8TL53G4U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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