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STMicroelectronics STM8S105C6T3TR
- Part No.:
- STM8S105C6T3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8S105C6T3TR.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
STM8S105C6T3TR from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 32 Kbyte Flash, 1 Kbyte data EEPROM, 10-bit ADC with 10 channels, and integrated UART, SPI, and I²C interfaces - deployed in industrial sensor nodes, motor control subsystems, and smart appliance UI controllers.
For engineers reviewing the STM8S105C6T3TR datasheet, STM8S105C6T3TR pinout, STM8S105C6T3TR application, or STM8S105C6T3TR equivalent, key selection considerations include Flash endurance (10 kcycles), EEPROM retention (20 years at 55 °C), LQFP48 package compatibility, and support for SmartCard/IrDA/LIN via UART2.
Technical Context
The STM8S105C6T3TR implements a Harvard-architecture 16 MHz STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in resource-constrained embedded systems. Its clock system integrates four master sources: user-trimmable 16 MHz RC, low-power 128 kHz RC, crystal resonator, and external clock - all monitored by a dedicated clock security system.
Interrupt handling uses a nested controller supporting 32 interrupts and up to 37 external inputs across six vectors, while memory architecture separates program (Flash), data (EEPROM + RAM), and register spaces - with hardware-assisted scan mode for ADC and remappable alternate functions for all I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 16 MHz STM8 8-bit CPU with Harvard architecture and 3-stage pipeline - enables deterministic timing for motor commutation and sensor sampling loops. |
| Flash Memory | 32 Kbyte on-chip Flash with 20-year data retention at 55 °C after 10,000 write/erase cycles - supports field firmware updates without external storage. |
| Data EEPROM | 1 Kbyte true data EEPROM rated for 300,000 write/erase cycles - stores calibration coefficients, device IDs, or runtime configuration persistently. |
| ADC | 10-bit SAR ADC with ±1 LSB INL, up to 10 multiplexed inputs, scan mode, and analog watchdog - suitable for precision temperature and voltage monitoring. |
| Timers | One 16-bit advanced control timer (TIM1) with dead-time insertion and complementary outputs; two 16-bit general-purpose timers (TIM2/TIM3); one 8-bit basic timer (TIM4) - enables 3-phase motor control and PWM generation. |
| Communication | UART2 with LIN master, SmartCard, and IrDA support; SPI up to 8 Mbit/s; I²C up to 400 kbit/s - provides interoperability with automotive sensors, displays, and power management ICs. |
| I/O Capability | Up to 38 I/Os in LQFP48 package, including 16 high-sink outputs (20 mA) - drives LEDs, relays, and optocouplers directly without external buffers. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40 to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 2.95–5.5 V supply rails; decoupling required per datasheet Section 10.3.1 (VCAP capacitor). |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset button or supervisor IC integration. |
| PA0–PA7 | Port A I/O bank | 8-bit bidirectional port with alternate functions including TIM1/UART2/SPI/I²C - remappable via option bytes. |
| PB0–PB7 | Port B I/O bank | 8-bit bidirectional port supporting TIM2/TIM3/ADC/UART2 - includes high-sink capability on PB5–PB7 (20 mA). |
| PC0–PC7 | Port C I/O bank | 8-bit bidirectional port with TIM1/ADC/SPI/I²C functions - PC6/PC7 serve as crystal oscillator inputs (HSE). |
| PD0–PD7 | Port D I/O bank | 8-bit bidirectional port with TIM1/TIM2/UART2 functions - PD0/PD1 are UART2 TX/RX; PD2–PD4 support SPI. |
| PE0–PE7 | Port E I/O bank | 8-bit bidirectional port with TIM1/ADC/I²C functions - PE0–PE3 used for I²C SCL/SDA and ADC inputs. |
| SWIM | Single-wire interface module | Debug and programming interface using single pin (PD7) - enables in-circuit programming and real-time debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power operation | Three low-power modes (wait, active-halt, halt) with individual peripheral clock gating - reduces system standby current to <1 µA in halt mode. |
| Robust I/O design | Immunity to current injection per IEC 61000-4-2 Level 4 (±8 kV contact discharge) - ensures reliability in noisy industrial environments. |
| Hardware safety | Clock security system with dedicated monitor and independent/window watchdog timers - prevents runaway code due to clock fault or software hang. |
| Unique device identity | 96-bit factory-programmed unique ID accessible via memory-mapped registers - enables secure device authentication and license binding. |
| Flexible clock trimming | User-adjustable 16 MHz RC oscillator calibrated to ±1% over temperature and voltage - eliminates need for external crystal in cost-sensitive applications. |
Applications
| Industrial Sensor Node | Smart Appliance UI Controller |
|---|---|
Use Scenario: Standalone temperature/humidity/pressure sensing node with local display and RS-485 communication. IC Role / Device Role / Timing Role: Main MCU executing sensor acquisition, linearization, and protocol stack (Modbus RTU over UART). Use Value: Integrated 10-bit ADC with analog watchdog and 32 Kbyte Flash enable firmware-over-air updates and sensor self-diagnostics without external components. |
Use Scenario: Front-panel control unit for washing machine with rotary encoder, LED indicators, buzzer, and relay drivers. IC Role / Device Role / Timing Role: Real-time UI coordinator managing input debouncing, LED PWM dimming, buzzer tone generation, and motor relay sequencing. Use Value: 16 high-sink I/Os drive LEDs and relays directly; TIM1 dead-time insertion safely controls dual-coil solenoid actuation. |
| BLDC Motor Starter | Energy Meter Communication Module |
Use Scenario: Low-cost 3-phase BLDC starter for fans or pumps with Hall-effect rotor position feedback. IC Role / Device Role / Timing Role: Commutation engine generating six-step PWM with precise timing and phase synchronization. Use Value: TIM1's complementary outputs with programmable dead-time prevent shoot-through; 16 MHz core ensures sub-microsecond interrupt latency for Hall edge detection. |
Use Scenario: PLC-connected energy meter add-on module supporting DLMS/COSEM over RS-485 and HAN over M-Bus. IC Role / Device Role / Timing Role: Protocol bridge translating between meter's SPI interface and external communication PHYs (MAX485/MAX13050). Use Value: UART2's LIN master mode and IrDA encoding simplify integration with legacy utility infrastructure; 1 Kbyte EEPROM stores tariff tables and event logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8S003F3P6 | 16 Kbyte Flash, 1 Kbyte RAM, no data EEPROM, LQFP32 package - lacks integrated EEPROM and has reduced peripheral count (no TIM1, limited ADC channels). | Suitable for simpler UI or sensor readout where EEPROM persistence is handled externally or omitted. | Select when cost and footprint are primary constraints and EEPROM-based calibration is unnecessary. |
| STM8L052C6T6 | Ultra-low-power variant with 32 Kbyte Flash, 2 Kbyte RAM, 1 Kbyte EEPROM, but 12 MHz max clock and different low-power architecture (true stop mode <300 nA). | Better suited for battery-powered meters or wireless sensors requiring multi-year operation on coin cell. | Choose when sub-µA sleep current and extended battery life outweigh need for 16 MHz deterministic timing. |
Compared with STM8S105C6T3TR, STM8S003F3P6 trades EEPROM and advanced timers for lower cost and size, while STM8L052C6T6 prioritizes ultra-low-power operation over peak performance - making the STM8S105C6T3TR optimal for mains-powered industrial control with persistent parameter storage and motor timing demands.
Availability
STM8S105C6T3TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance UI controllers, BLDC motor starters, and energy meter communication modules requiring stable component supply and long-term production support.
Supply support for STM8S105C6T3TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM8S series targets cost-sensitive, high-reliability embedded applications requiring Flash-based programmability, robust I/O, and integrated peripherals - optimized for industrial automation, home appliances, and motor control.
FAQ
What is the maximum operating frequency and voltage range of the STM8S105C6T3TR?
The STM8S105C6T3TR operates at up to 16 MHz across a supply voltage range of 2.95 V to 5.5 V. Its fCPUmax scales linearly with VDD per Figure 11 in DS5855 Rev 16 - e.g., 16 MHz is guaranteed at VDD ≥ 4.5 V, while 12 MHz is supported down to 2.95 V. Internal clock sources include a trimmable 16 MHz RC oscillator and 128 kHz low-power RC.
Does the STM8S105C6T3TR support in-circuit debugging and programming?
Yes - it features a Single-Wire Interface Module (SWIM) accessible via PD7, enabling full-speed in-circuit debugging, flash programming, and memory inspection using ST-LINK/V2 or compatible debuggers. SWIM requires no additional pins beyond the debug interface and supports hot-plug connection without resetting the target.
How is the 1 Kbyte data EEPROM endurance and retention specified?
The integrated data EEPROM is rated for 300,000 write/erase cycles and guarantees 20 years of data retention at 55 °C ambient temperature. Retention degrades logarithmically with temperature - e.g., >100 years at 25 °C - and is validated per JEDEC JESD22-A117. Wear leveling must be implemented in firmware for extended lifetime.
Can the STM8S105C6T3TR drive high-current loads directly from its I/O pins?
Yes - 16 I/O pins (including PB5–PB7, PC0–PC7, PD0–PD3, PE0–PE3) are designated as high-sink outputs capable of sinking up to 20 mA each, with total package sink current limited to 80 mA. These pins can directly drive LEDs, small relays, or optocouplers without external transistors, provided thermal limits and pin grouping rules in Section 10.3.6 are observed.
STM8S105C6T3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM8S
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.95V ~ 5.5V
- Data Converters:
- A/D 10x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105C6T3TR FAQ
1.How can I place an order for STM8S105C6T3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105C6T3TR 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 STM8S105C6T3TR reliable?
The price and inventory of STM8S105C6T3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105C6T3TR is usually 5 days.
3.What payment methods are accepted for STM8S105C6T3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105C6T3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105C6T3TR?
STM8S105C6T3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105C6T3TR 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 STM8S105C6T3TR?
For technical support, including STM8S105C6T3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105C6T3TR requirements.
6.How does Aetrix verify that STM8S105C6T3TR is sourced from the original manufacturer or authorized distributors?
All STM8S105C6T3TR 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 STM8S105C6T3TR meets industry standards.
7.What is the process for return or replacement of STM8S105C6T3TR?
All STM8S105C6T3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105C6T3TR, 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 STM8S105C6T3TR part is unused and in its original packaging.
Return procedure for STM8S105C6T3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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