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STMicroelectronics STM8S105K6T3CTR
- Part No.:
- STM8S105K6T3CTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8S105K6T3CTR.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
STM8S105K6T3CTR from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 32 Kbyte Flash program memory, 1 Kbyte true data EEPROM (300 kcycle endurance), 2 Kbyte RAM, and integrated 10-bit ADC with 10-channel multiplexing. It supports UART, SPI, and I²C interfaces and targets cost-sensitive industrial control, appliance motor management, and sensor interface applications.
For engineers reviewing the STM8S105K6T3CTR datasheet, STM8S105K6T3CTR pinout, STM8S105K6T3CTR application, or STM8S105K6T3CTR equivalent, key selection criteria include its LQFP48 package compatibility, 2.95–5.5 V wide supply range, nested interrupt controller with 32 vectors, low-power modes (wait/active-halt/halt), and SWIM single-wire debug interface for in-circuit programming.
Technical Context
The STM8S105K6T3CTR implements a Harvard-architecture 8-bit core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution. Its clock system integrates four master sources: user-trimmable 16 MHz RC, 128 kHz low-power RC, crystal resonator oscillator, and external clock input - all monitored by a clock security system.
Peripheral integration includes an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs for motor control, two general-purpose 16-bit timers (TIM2/TIM3), an 8-bit basic timer (TIM4), independent/window watchdogs, and a 10-bit ADC with analog watchdog and scan mode - all accessible via configurable GPIOs on the LQFP48 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | STM8 8-bit Harvard architecture, 16 MHz max CPU frequency at 5.5 V - enables deterministic real-time control loops up to 1 µs resolution. |
| Flash Memory | 32 Kbyte on-chip Flash with 20-year data retention at 55 °C after 10 kcycles - supports field firmware updates without external memory. |
| Data EEPROM | 1 Kbyte true data EEPROM, rated for 300 kwrite cycles - stores calibration data, device configuration, or runtime counters reliably. |
| ADC | 10-bit SAR ADC with ±1 LSB INL, up to 10 multiplexed inputs, scan mode, and analog watchdog - suitable for precision sensor signal acquisition. |
| Supply Voltage | 2.95 V to 5.5 V operating range - allows direct interfacing with 3.3 V and 5 V logic systems without level-shifting. |
| Low-Power Modes | Wait, active-halt, and halt modes with individual peripheral clock gating - reduces active current to 230 µA (halt @ 3.3 V) for battery-powered operation. |
| I/O Count | Up to 38 I/Os in LQFP48 package, including 16 high-sink outputs (20 mA sink capability) - drives LEDs, relays, or MOSFET gates directly. |
| Debug Interface | Single Wire Interface Module (SWIM) - enables full in-circuit debugging and programming using one pin and no dedicated JTAG header. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply (core & I/O) | Primary 2.95–5.5 V supply input; decoupling required per datasheet layout guidelines. |
| VSS | Ground reference | Digital ground return path; separate analog ground (VSSA) available for ADC noise isolation. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external push-button or supervisor IC assertion. |
| SWIM | Single-wire debug interface | Bi-directional pin for programming, erasing, and debugging - eliminates need for multi-pin debug headers. |
| PA0–PA7 | Port A general-purpose I/O | 8-bit port with alternate functions including ADC1_IN0–IN7, TIM1_CH1–CH4, and UART1_TX/RX remapping capability. |
| PB0–PB7 | Port B general-purpose I/O | 8-bit port supporting SPI_CLK/MOSI/MISO, I²C_SCL/SDA, TIM2/TIM3 channels, and external interrupt inputs. |
| PC0–PC7 | Port C general-purpose I/O | 8-bit port with UART2_TX/RX, TIM1 complementary outputs (OCxN), and high-sink capability on PC0–PC7 (20 mA sink). |
| PD0–PD7 | Port D general-purpose I/O | 8-bit port supporting TIM2/TIM3 capture/compare, UART1/UART2, and external wake-up sources. |
| PE0–PE7 | Port E general-purpose I/O | 8-bit port with ADC1_IN8/IN9, TIM4, beeper output, and SWIM remapping option (PE1). |
| VDDA/VSSA | Analog power/ground | Dedicated 2.95–5.5 V analog supply and ground - isolates ADC reference from digital switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance - eliminates need for external serial EEPROM in parameter storage designs. |
| Flexible Clock System | Four selectable clock sources with automatic failover and clock security monitor - ensures robust timing under voltage or oscillator fault conditions. |
| Advanced Timer (TIM1) | 16-bit timer with 3 complementary PWM outputs and programmable dead-time insertion - enables 3-phase motor control without external gate drivers. |
| SWIM Debug Interface | Single-pin, non-intrusive in-circuit programming and debugging - reduces PCB footprint and BOM cost vs. SWD/JTAG solutions. |
| High-Sink I/Os | 16 pins capable of sinking 20 mA each - directly drives indicators, small solenoids, or N-channel MOSFET gates without external buffers. |
| Industrial Temp Range | –40 °C to +85 °C operation with guaranteed specs - validated for use in HVAC controllers, industrial sensors, and factory automation equipment. |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Washing machine main control board managing motor sequencing, water valve actuation, and temperature sensing. IC Role / Device Role / Timing Role: Central MCU executing state-machine logic, generating 3-phase PWM for brushless motor, and sampling thermistor/NTC inputs via ADC. Use Value: Integrated 32 Kbyte Flash and EEPROM store firmware and calibration data; high-sink I/Os drive valves and indicators directly. |
Use Scenario: Wireless environmental sensor node monitoring temperature, humidity, and CO₂ in smart building HVAC ducts. IC Role / Device Role / Timing Role: Data acquisition MCU reading analog sensors, processing values, and transmitting via UART-to-LoRa module. Use Value: Low-power halt mode (<230 µA @ 3.3 V) extends battery life; 10-bit ADC provides sufficient resolution for NTC-based temperature measurement. |
| Motor Drive Interface | Smart Power Outlet |
|
Use Scenario: Fan speed controller in commercial air handling units using sensorless BLDC commutation. IC Role / Device Role / Timing Role: Real-time motor controller generating synchronized PWM signals with dead-time control via TIM1. Use Value: Complementary PWM outputs and hardware dead-time insertion prevent shoot-through in half-bridge drivers - improves reliability and efficiency. |
Use Scenario: DIN-rail mounted smart outlet with energy metering, relay control, and RS-485 communication. IC Role / Device Role / Timing Role: System manager coordinating relay switching, current sensing ADC reads, and UART-based Modbus RTU protocol stack. Use Value: UART with clock output supports synchronous RS-485 transceiver timing; 38 GPIOs accommodate isolated relay drivers and status LEDs. |
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 - lower memory and missing EEPROM. | Suitable for simpler control tasks without persistent parameter storage; lacks ADC channel count and timer features. | Select when BOM cost is critical and EEPROM/ADC/timer requirements are reduced. |
| STM8L052C6T6 | Ultra-low-power variant (1.65–3.6 V), 32 Kbyte Flash, 2 Kbyte RAM, but no data EEPROM; uses different clock architecture. | Optimized for battery-powered devices; lacks high-sink I/Os and industrial temp rating. | Prefer for energy-harvesting or coin-cell applications where supply voltage is ≤3.3 V and EEPROM is not required. |
Compared with STM8S003F3P6, the STM8S105K6T3CTR adds EEPROM, more ADC channels, and higher I/O drive strength; versus STM8L052C6T6, it trades ultra-low-power operation for wider voltage range, industrial temperature support, and integrated EEPROM - making it optimal for AC-powered industrial controls.
Availability
STM8S105K6T3CTR is available at Aetrix Electronics and suitable for industrial motor control, home appliance mainboards, and sensor interface modules requiring stable component supply across multi-year production cycles.
Supply support for STM8S105K6T3CTR 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 components for industrial, automotive, and consumer markets.
The STM8S series is ST's mainstream 8-bit MCU product line targeting cost-sensitive, high-reliability embedded control applications - emphasizing ease of migration from legacy 8051 or PIC platforms while delivering enhanced peripherals and toolchain support.
FAQ
What is the maximum operating frequency of the STM8S105K6T3CTR?
The STM8S105K6T3CTR achieves a maximum CPU frequency of 16 MHz at VDD ≥ 4.5 V; at 3.3 V, the guaranteed maximum is 14 MHz per electrical characteristics (Figure 11). This frequency is derived from the internal 16 MHz RC oscillator, which is factory-trimmed and user-adjustable via calibration registers.
Does the STM8S105K6T3CTR support in-system programming (ISP)?
Yes - the device supports full in-system programming via the Single Wire Interface Module (SWIM) using only the SWIM pin and NRST. No external bootloader is required; ST's STVP or STM8CubeProgrammer tools enable flash programming, EEPROM write, and option byte configuration through this interface.
How many ADC channels are available, and what is their accuracy?
The STM8S105K6T3CTR integrates a 10-bit ADC with up to 10 multiplexed input channels (ADC1_IN0 to ADC1_IN9). Accuracy is specified as ±1 LSB integral nonlinearity (INL) and ±2 LSB differential nonlinearity (DNL) at VDDA = 5 V and fADC ≤ 1 MHz, with typical SNR of 59 dB.
Is there hardware support for PWM generation with dead-time control?
Yes - the advanced control timer (TIM1) provides three complementary PWM outputs with programmable dead-time insertion (0–1023 × tCK_TIM1), synchronization with other timers, and fault protection via break input. This enables safe driving of 3-phase inverter bridges without external dead-time ICs.
STM8S105K6T3CTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-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:
- 25
- 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 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105K6T3CTR FAQ
1.How can I place an order for STM8S105K6T3CTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105K6T3CTR 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 STM8S105K6T3CTR reliable?
The price and inventory of STM8S105K6T3CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105K6T3CTR is usually 5 days.
3.What payment methods are accepted for STM8S105K6T3CTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105K6T3CTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105K6T3CTR?
STM8S105K6T3CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105K6T3CTR 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 STM8S105K6T3CTR?
For technical support, including STM8S105K6T3CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105K6T3CTR requirements.
6.How does Aetrix verify that STM8S105K6T3CTR is sourced from the original manufacturer or authorized distributors?
All STM8S105K6T3CTR 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 STM8S105K6T3CTR meets industry standards.
7.What is the process for return or replacement of STM8S105K6T3CTR?
All STM8S105K6T3CTR units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105K6T3CTR, 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 STM8S105K6T3CTR part is unused and in its original packaging.
Return procedure for STM8S105K6T3CTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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