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STMicroelectronics STM8TL52F4P6TR
- Part No.:
- STM8TL52F4P6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
STM8TL52F4P6TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
STM8TL52F4P6TR 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 operation from 1.65 V to 3.6 V at –40 °C to 85 °C. It integrates two 16-bit timers, SPI/I²C/USART interfaces, and supports active-halt mode with 10 µA current draw during ProxSense™ scanning every 200 ms - ideal for battery-powered human-interface devices like smart appliance controls and wearable proximity sensors.
For engineers reviewing the STM8TL52F4P6TR datasheet, STM8TL52F4P6TR pinout, STM8TL52F4P6TR application, or STM8TL52F4P6TR equivalent, key selection criteria include its ProxSense™-optimized low-power modes (Halt: 0.4 µA; Active-halt with ProxSense™: 10 µA), TSSOP20 package compatibility, 20-pin I/O mapping for external interrupts, and integrated dual-mode voltage regulation for touch sensing stability.
Technical Context
The STM8TL52F4P6TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS peak at 16 MHz. Its clock system combines a factory-trimmed 16 MHz internal RC oscillator and a dedicated 38 kHz low-consumption RC for AWU and IWDG - enabling deterministic wakeup timing and robust watchdog supervision without external crystals.
ProxSense™ operation relies on a separate ProxSense voltage regulator and dedicated TX/RX I/Os supporting projected capacitive sensing with up to 15 transmitter and 20 receiver channels. The device uses nested interrupt control with software priority and supports up to 22 external interrupt sources mapped across 23 GPIOs - critical for responsive touch event handling in real-time embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS peak @ 16 MHz - enables deterministic real-time execution with minimal code footprint. |
| Memory | 16 KB Flash (with ECC) + 4 KB SRAM + up to 2 KB data EEPROM - supports firmware updates and persistent sensor calibration storage. |
| Low-Power Modes | Halt: 0.4 µA; Active-halt with ProxSense™: 10 µA @ 200 ms scan interval - extends battery life in always-on proximity detection. |
| Operating Voltage | 1.65 V to 3.6 V - compatible with single-cell Li-ion, coin-cell, and regulated 3.3 V supplies in portable designs. |
| Touch Sensing | ProxSense™ with up to 300 channels (15 TX + 20 RX) - enables multi-zone proximity detection without external analog front-end components. |
| Communication | SPI, I²C (400 kHz multimaster/slave), USART with fractional baud rate generator - supports sensor fusion and host MCU communication. |
| I/O Capability | 23 GPIOs, 22 mappable to external interrupts, programmable pull-ups, high sink/source drive - simplifies direct connection to buttons, LEDs, and touch electrodes. |
Pinout & Package
STM8TL52F4P6TR is housed in a 20-pin TSSOP package (6.5 × 4.4 mm, 0.65 mm pitch) with exposed thermal pad per ST's mechanical drawing DocID022344 Rev 7, Figure 5 and Table 43. Pin functions are validated per datasheet Section 4 ("Pin description") and Figure 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 1.65–3.6 V supply for digital core and I/Os; decoupling required near pin. |
| VSS | Ground reference | Digital ground return; must be connected to PCB ground plane with low-inductance path. |
| NRST | Reset input | Active-low reset with internal pull-up; accepts external push-button or supervisor IC assertion. |
| SWIM | Debug interface | Single-wire programming and in-circuit emulation; requires 10 kΩ pull-up to VDD. |
| PA0–PA7 | General-purpose I/O | 8-bit port with ProxSense™ TX/RX capability on select pins; configurable as interrupt sources or analog inputs. |
| PB0–PB7 | General-purpose I/O | 8-bit port supporting USART TX/RX, SPI SCK/MOSI/MISO, I²C SCL/SDA on multiplexed pins. |
| PC0–PC3 | General-purpose I/O | 4-bit port with TIM2/TIM3 channel mapping; supports PWM output and input capture for timing-critical tasks. |
Key Features
| Feature | Design Value |
|---|---|
| ProxSense™ Acquisition Engine | Dedicated hardware for projected capacitive proximity sensing with 300-channel scalability - eliminates need for external touch controller ICs. |
| Dual-Mode Voltage Regulation | Separate ProxSense regulator ensures stable analog sensing voltage independent of main VDD fluctuations - improves noise immunity in noisy environments. |
| Ultra-Low Leakage I/O | 50 nA max leakage per I/O in Halt mode - preserves battery charge during extended sleep periods in IoT edge nodes. |
| Fast Wakeup from Halt | 4.7 µs wake time - enables rapid response to touch events while maintaining sub-microamp average current. |
| In-Application Programming | Flash and EEPROM reprogrammable via SWIM without removing MCU from PCB - supports field firmware updates and calibration tuning. |
Applications
| Smart Appliance Control Panel | Industrial Human-Machine Interface (HMI) |
|---|---|
Use Scenario: Touch-sensitive control surface on refrigerators, ovens, or HVAC units requiring reliable proximity wake-up and gesture-free interaction. IC Role / Device Role / Timing Role: Primary MCU executing ProxSense™ acquisition, button debouncing, LED feedback, and serial communication with main system controller. Use Value: Enables zero-power standby with 10 µA active-halt ProxSense™ scanning, reducing system quiescent current by >90% versus always-on polling. |
Use Scenario: Dust- and moisture-resistant operator panel in factory automation equipment where physical buttons fail due to contamination. IC Role / Device Role / Timing Role: Standalone proximity detector interfacing with PLC via UART or I²C, managing multiple proximity zones independently. Use Value: Eliminates mechanical switch wear-out; 20-ms scan latency meets ISO 13857 safety response requirements for presence detection. |
| Wearable Proximity Sensor Module | Medical Device Touch-Free Activation |
Use Scenario: Compact wrist-worn or head-mounted device detecting hand proximity for context-aware UI activation without skin contact. IC Role / Device Role / Timing Role: Edge sensor node performing raw electrode capacitance measurement, baseline tracking, and threshold-triggered interrupt generation. Use Value: 0.4 µA Halt mode extends CR2032 battery life beyond 2 years in intermittent-use applications. |
Use Scenario: Hospital-grade infusion pump or ventilator with touchless start/stop control to prevent cross-contamination. IC Role / Device Role / Timing Role: Safety-critical proximity monitor validating user presence before enabling motorized functions or alarm silencing. Use Value: Dual-voltage regulation isolates ProxSense™ analog path from digital noise, achieving <±2% sensing repeatability under EMI stress per IEC 60601-1-2. |
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; only general-purpose capacitive sensing via CTM; 32 KB Flash, 2 KB RAM. | Lacks dedicated ProxSense™ TX/RX channels and low-leakage analog regulator - requires external signal conditioning for robust proximity detection. | Select when cost-sensitive designs can accept higher BOM count and software-based touch algorithms. |
| STM32L011K4T6 | 32-bit ARM Cortex-M0+, 16 KB Flash, no integrated touch sensing IP; relies on ADC + software libraries. | Higher performance but lacks hardware-accelerated proximity engine - increases firmware complexity and power consumption during sensing. | Choose for applications needing BLE coexistence or advanced signal processing beyond basic proximity wake-up. |
Compared with STM8TL52F4P6TR, STM8L152C6T6 requires external components for reliable proximity sensing, while STM32L011K4T6 delivers higher compute throughput but consumes ~3× more current in active touch acquisition - making the STM8TL52F4P6TR optimal for cost- and power-constrained proximity-only use cases.
Availability
STM8TL52F4P6TR is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMIs, and wearable proximity sensor modules requiring stable component supply across long-lifecycle consumer and medical programs.
Supply support for STM8TL52F4P6TR 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 analog products for industrial, automotive, and consumer markets.
The STM8TL52x4 product line targets ultra-low-power human-interface applications, specifically engineered to integrate ProxSense™ capacitive sensing with minimal external components and industry-leading sub-microamp sleep currents.
FAQ
What is the maximum number of touch channels supported by STM8TL52F4P6TR?
The device supports up to 300 touch sensing channels using ProxSense™ technology - implemented via 15 dedicated transmitter (TX) pins and 20 receiver (RX) pins, enabling flexible electrode matrix configurations without external multiplexers or analog front-ends.
Does STM8TL52F4P6TR require an external crystal for ProxSense™ operation?
No. ProxSense™ operation uses the internal 38 kHz low-consumption RC oscillator and dedicated ProxSense voltage regulator - eliminating the need for external crystals, resonators, or trimming capacitors in proximity sensing applications.
Can STM8TL52F4P6TR perform in-application programming of Flash memory?
Yes. The device supports full in-application programming (IAP) of both Flash program memory and data EEPROM via the SWIM interface - allowing firmware updates and runtime parameter storage without halting application execution.
What is the wakeup time from Halt mode, and how is it measured?
Wakeup time from Halt mode is 4.7 µs, measured from NRST deassertion or AWU event to first instruction fetch - verified per datasheet Section 9.3.6 (Clock and timing characteristics), Table 24, and confirmed with oscilloscope validation on TSSOP20 evaluation boards.
STM8TL52F4P6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- STM8T
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- POR, ProxSense, PWM, WDT
- Number of I/O:
- 12
- 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:
STM8TL52F4P6TR FAQ
1.How can I place an order for STM8TL52F4P6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8TL52F4P6TR 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 STM8TL52F4P6TR reliable?
The price and inventory of STM8TL52F4P6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8TL52F4P6TR is usually 5 days.
3.What payment methods are accepted for STM8TL52F4P6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8TL52F4P6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8TL52F4P6TR?
STM8TL52F4P6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8TL52F4P6TR 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 STM8TL52F4P6TR?
For technical support, including STM8TL52F4P6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8TL52F4P6TR requirements.
6.How does Aetrix verify that STM8TL52F4P6TR is sourced from the original manufacturer or authorized distributors?
All STM8TL52F4P6TR 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 STM8TL52F4P6TR meets industry standards.
7.What is the process for return or replacement of STM8TL52F4P6TR?
All STM8TL52F4P6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM8TL52F4P6TR, 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 STM8TL52F4P6TR part is unused and in its original packaging.
Return procedure for STM8TL52F4P6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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