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STMicroelectronics STM8S105C4T6TR
- Part No.:
- STM8S105C4T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8S105C4T6TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:7,200
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Product details
Overview
STM8S105C4T6TR from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 16 KB Flash, 1 KB data EEPROM, 10-bit ADC with 10 channels, UART/SPI/I²C interfaces, and advanced timers including TIM1 with dead-time insertion - deployed in motor control subsystems for HVAC blowers and industrial pump controllers.
For engineers reviewing the STM8S105C4T6TR datasheet, STM8S105C4T6TR pinout, STM8S105C4T6TR application, or STM8S105C4T6TR equivalent, key selection criteria include Flash endurance (10 kcycles), EEPROM retention (20 years at 55 °C), LQFP48 package compatibility, and support for LIN master mode and SmartCard UART operation.
Technical Context
The device implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution. It integrates dual watchdog timers (independent + window), auto-wakeup timer, and SWIM single-wire debug interface for in-system programming and low-pin-count development.
Clock architecture includes four selectable sources: external crystal (up to 24 MHz), external clock input, user-trimmable 16 MHz RC, and low-power 128 kHz RC - all managed by a clock security system with dedicated monitor circuitry to detect failure and trigger reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | STM8 8-bit Harvard architecture, 16 MHz max CPU frequency - enables deterministic real-time control loops with sub-μs interrupt latency. |
| Flash Memory | 16 KB program Flash, 10 kcycle endurance, 20-year data retention at 55 °C - supports field firmware updates without premature wear-out. |
| Data EEPROM | 1 KB true data EEPROM, 300 kcycle write endurance - stores calibration data, configuration parameters, and runtime counters reliably. |
| ADC | 10-bit ±1 LSB ADC with 10 multiplexed inputs and analog watchdog - provides accurate sensor monitoring (e.g., temperature, current) with hardware-triggered fault detection. |
| Timers | TIM1 (16-bit advanced, 4 CAPCOM, dead-time insertion), TIM2/TIM3 (16-bit general purpose), TIM4 (8-bit basic) - supports motor phase control, PWM generation, and precise timing intervals. |
| Communication | UART (LIN master, SmartCard, IrDA), SPI (up to 8 Mbit/s), I²C (up to 400 kbit/s) - enables interoperability with sensors, displays, and automotive sub-networks. |
| Supply Range | 2.95–5.5 V operating voltage - compatible with both 3.3 V and 5 V industrial logic domains without level-shifting. |
| I/O Count | Up to 38 I/Os in LQFP48 package, including 16 high-sink outputs (20 mA) - drives LEDs, relays, and gate drivers directly. |
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 power domain: VDD powers digital core and I/Os; VSS is common reference - requires local 100 nF decoupling per VDD pin. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts Schmitt-triggered signal - ensures robust startup and brown-out recovery. |
| SWIM | Single-wire interface module | Dedicated debug/programming pin - enables full in-circuit debugging and Flash programming using ST-LINK tools. |
| PA0–PA7 | Port A general-purpose I/O | 8-bit bidirectional port with alternate functions including UART TX/RX, SPI SCK/MOSI/MISO, and ADC IN0–IN7 - configurable per application need. |
| PB0–PB7 | Port B general-purpose I/O | 8-bit port supporting TIM1/2/3 channels, I²C SCL/SDA, and high-sink outputs - used for PWM-driven actuators and bus interfacing. |
| PC0–PC7 | Port C general-purpose I/O | 8-bit port with TIM1 complementary outputs, UART CLK, and LIN transceiver interface - critical for motor gate drive synchronization. |
| PD0–PD7 | Port D general-purpose I/O | 8-bit port supporting TIM2/TIM3 CAPCOM, SPI NSS, and external interrupt inputs - handles encoder feedback and safety monitoring signals. |
| PE0–PE7 | Port E general-purpose I/O | 8-bit port with ADC VREF+, VDDA, VSSA, and oscillator pins - separates analog reference and power domains for ADC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power modes | Wait, active-halt, and halt modes with individual peripheral clock gating - reduces system standby current to <1 μA while preserving RAM and register state. |
| True data EEPROM | 1 KB on-chip EEPROM with 300 kcycle endurance - eliminates need for external nonvolatile memory in parameter storage applications. |
| Advanced TIM1 | 16-bit timer with 3 complementary outputs and programmable dead-time - enables direct driving of 3-phase inverter bridges without external logic. |
| UART with LIN master | Hardware LIN 2.1/2.2 frame generation and checksum calculation - simplifies integration into automotive body electronics networks. |
| 96-bit unique ID | Factory-programmed read-only identifier - supports secure device authentication and firmware licensing in OEM production. |
| Robust I/O design | Immunity to current injection up to 100 mA - withstands ESD events and noisy industrial environments without latch-up. |
Applications
| Motor Control Subsystem | Industrial Sensor Node |
|---|---|
Use Scenario: Closed-loop speed and torque control of 3-phase BLDC motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Primary MCU executing FOC algorithm, generating synchronized PWM via TIM1, sampling current/voltage via ADC, and communicating status over UART. Use Value: Integrated dead-time insertion and high-sink I/Os eliminate external gate driver logic, reducing BOM count and PCB area. | Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and air quality in factory settings. IC Role / Device Role / Timing Role: System controller managing sensor polling, data logging to EEPROM, low-power wake-up scheduling, and wireless gateway communication via UART-to-LoRa bridge. Use Value: 1 KB EEPROM retains calibration coefficients across 300k write cycles; ultra-low halt-mode current (<1 μA) extends battery life beyond 5 years. |
| Smart Appliance UI Controller | Automotive Body Control Module |
Use Scenario: Touchless interface and LED backlight control in washing machines and dishwashers. IC Role / Device Role / Timing Role: Dedicated UI processor handling capacitive touch sensing (via ADC scan), RGB LED PWM dimming, buzzer tone generation, and I²C communication with main MCU. Use Value: 10-bit ADC with analog watchdog detects finger proximity; 16 high-sink I/Os drive LEDs directly without external drivers. | Use Scenario: LIN-connected door module controlling window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: LIN slave node receiving commands from central BCM, executing local actuator control, and reporting diagnostics via UART/LIN. Use Value: Hardware LIN master capability allows self-test and reprogramming over LIN bus; robust I/O design meets automotive EMC requirements. |
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 | 8 KB Flash, 1 KB RAM, no data EEPROM, LQFP20 package | Targeted at cost-sensitive, space-constrained applications with minimal nonvolatile storage needs | Select when EEPROM is unnecessary and I/O count ≤16 suffices; lacks TIM1 advanced features. |
| STM8L052C6T6 | Ultra-low-power variant, 32 KB Flash, 2 KB RAM, 1 KB EEPROM, but 12 MHz max clock and different peripheral set | Optimized for battery-powered IoT nodes requiring sub-μA sleep current and AES encryption | Choose for energy-critical designs; not drop-in due to different clock tree and missing LIN/SmartCard UART modes. |
Compared with STM8S003F3P6, the STM8S105C4T6TR adds EEPROM persistence and advanced motor control peripherals; versus STM8L052C6T6, it delivers higher performance and automotive-grade UART features at the expense of higher active current.
Availability
STM8S105C4T6TR is available at Aetrix Electronics and suitable for motor control subsystems, industrial sensor nodes, smart appliance UI controllers, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for STM8S105C4T6TR 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM8S series targets cost-effective, robust 8-bit control in industrial automation and appliance applications - emphasizing Flash reliability, mixed-signal integration, and long-term product availability.
FAQ
What is the maximum operating frequency and corresponding supply voltage range?
The STM8S105C4T6TR operates up to 16 MHz across its full supply range of 2.95 V to 5.5 V. At 5.5 V, it sustains 16 MHz reliably; at 2.95 V, maximum frequency is 12 MHz per Figure 11 in DS5855 Rev 16. This voltage-frequency scaling ensures consistent timing margins in varying power conditions.
Does this MCU support in-circuit debugging and programming without additional hardware?
Yes - it features a dedicated SWIM (Single-Wire Interface Module) pin enabling full in-circuit debugging, Flash programming, and memory inspection using ST-LINK/V2 or compatible debuggers. No JTAG header or extra pins are required, reducing PCB footprint and test complexity.
How is the 1 KB data EEPROM organized and accessed?
The 1 KB data EEPROM is mapped into the linear address space starting at 0x4000 and is accessed via dedicated EEPROM control registers (FLASH_DUKR, FLASH_IAPSR). It supports byte/word writes with automatic erase-before-write and hardware error detection - no software emulation layer is needed.
Can the UART interface operate in LIN master mode, and what protocol versions are supported?
Yes - UART2 supports hardware LIN 2.1 and LIN 2.2 master mode with automatic sync field generation, PID calculation, checksum computation, and break detection. Frame timing complies with ISO 17987-4, enabling direct connection to standard LIN transceivers without bit-banging overhead.
STM8S105C4T6TR 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:
- 16KB (16K 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105C4T6TR FAQ
1.How can I place an order for STM8S105C4T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105C4T6TR 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 STM8S105C4T6TR reliable?
The price and inventory of STM8S105C4T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105C4T6TR is usually 5 days.
3.What payment methods are accepted for STM8S105C4T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105C4T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105C4T6TR?
STM8S105C4T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105C4T6TR 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 STM8S105C4T6TR?
For technical support, including STM8S105C4T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105C4T6TR requirements.
6.How does Aetrix verify that STM8S105C4T6TR is sourced from the original manufacturer or authorized distributors?
All STM8S105C4T6TR 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 STM8S105C4T6TR meets industry standards.
7.What is the process for return or replacement of STM8S105C4T6TR?
All STM8S105C4T6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105C4T6TR, 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 STM8S105C4T6TR part is unused and in its original packaging.
Return procedure for STM8S105C4T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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