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STMicroelectronics STM8S105S4T6C
- Part No.:
- STM8S105S4T6C
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
STM8S105S4T6C.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
STM8S105S4T6C 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, and integrated UART, SPI, and I²C interfaces. It delivers deterministic real-time control in industrial sensor nodes, motor drive supervision, and smart appliance UI subsystems.
For engineers reviewing the STM8S105S4T6C datasheet, STM8S105S4T6C pinout, STM8S105S4T6C application, or STM8S105S4T6C equivalent, key selection criteria include Flash endurance (10 kcycles), EEPROM retention (20 years at 55 °C), 38 I/O count in LQFP48, and support for LIN master mode and SmartCard protocols.
Technical Context
The STM8S105S4T6C implements a Harvard-architecture 8-bit core with 3-stage pipeline and extended instruction set, enabling single-cycle execution for most instructions. Its clock system integrates four independent sources: user-trimmable 16 MHz RC, 128 kHz low-power RC, crystal oscillator, and external clock input - all monitored by a dedicated clock security system.
Interrupt handling uses a nested controller supporting 32 vectors and up to 37 external interrupts across six priority levels. Memory subsystem includes segmented Flash with fast read/erase, true data EEPROM with 300 kcycle endurance, and RAM with hardware register mapping for peripheral control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline; enables deterministic timing for real-time control loops. |
| Max Operating Frequency | 16 MHz at 2.95–5.5 V; supports full-speed operation across industrial voltage range without derating. |
| Flash Memory | 16 KB program Flash with 20-year data retention at 55 °C after 10,000 erase/write cycles. |
| Data EEPROM | 1 KB true data EEPROM with 300,000 write/erase cycles; retains calibration data across device lifetime. |
| ADC Resolution & Channels | 10-bit SAR ADC with ±1 LSB INL/DNL and up to 10 multiplexed inputs; supports scan mode and analog watchdog. |
| I/O Count & Type | 38 I/O pins in LQFP48 package, including 16 high-sink outputs (20 mA) for direct LED/relay driving. |
| Communication Peripherals | UART (with LIN master, SmartCard, IrDA), SPI (up to 8 Mbit/s), I²C (up to 400 kbit/s); all support synchronous/asynchronous modes. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.95–5.5 V supply rail; decoupled via 100 nF capacitor near pin for noise immunity. |
| VSS | Ground reference | Digital ground return; separate analog ground (VSSA) required for ADC accuracy. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts Schmitt-triggered 1.5 V min pulse width. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with configurable pull-ups, alternate functions including TIM1/UART/SPI. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting high-sink capability (20 mA) on PB0–PB7 for direct load switching. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port with remappable alternate functions including ADC1_IN0–IN7 and I²C_SCL/SDA. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port supporting TIM2/TIM3 capture/compare, UART_TX/RX, and SWIM debug interface. |
| PE0–PE7 | General-purpose I/O port E | 8-bit port with TIM1 complementary outputs (CH1–CH3), dead-time insertion, and synchronization signals. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power clock management | Four selectable clock sources with automatic failover and clock monitor; enables <1 µA halt-mode current. |
| Robust I/O architecture | 38 I/Os with 20 mA high-sink capability on 16 pins; immune to current injection per IEC 61000-4-2 Level 4. |
| Integrated analog subsystem | 10-bit ADC with analog watchdog and scan mode; eliminates need for external supervisory IC in sensor monitoring. |
| Single-wire debug interface | SWIM (Single Wire Interface Module) enables full in-circuit debugging and programming via one pin (PD0). |
| Hardware safety features | Independent and window watchdog timers, power-on/power-down reset, and clock security system for fail-safe operation. |
Applications
| Industrial Sensor Node | Smart Appliance UI |
|---|---|
Use Scenario: Temperature/humidity sensing node with local display and wireless reporting. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, button debouncing, LCD segment driving, and UART-based firmware updates. Use Value: Integrated 10-bit ADC and 38 GPIO eliminate external signal conditioning; EEPROM stores calibration offsets and usage counters. | Use Scenario: Front-panel control board for washing machine with rotary encoder, LEDs, buzzer, and motor feedback. IC Role / Device Role / Timing Role: Real-time UI coordinator handling encoder interrupts, PWM-driven LED dimming, beeper tone generation, and motor status polling. Use Value: Advanced TIM1 with dead-time insertion safely drives half-bridge motor drivers; 16 high-sink I/Os directly drive LEDs without external transistors. |
| Motor Drive Supervision | Building Automation Node |
Use Scenario: Fan/pump controller with overcurrent detection, thermal shutdown, and speed regulation. IC Role / Device Role / Timing Role: Safety-monitoring co-processor interfacing with main MCU via UART/I²C; reads analog thermistor and current sense signals. Use Value: Analog watchdog triggers immediate interrupt on out-of-range temperature; EEPROM retains fault logs across power cycles. | Use Scenario: DALI or KNX-compatible lighting node with occupancy sensing and daylight harvesting. IC Role / Device Role / Timing Role: Protocol bridge translating DALI commands to PWM dimming signals while managing ambient light ADC readings. Use Value: LIN master mode enables cost-effective wired bus communication; 16 MHz core ensures sub-millisecond response to DALI frame reception. |
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 (20 pins) | Limited I/O (16) and memory; suitable only for ultra-low-cost, minimal-feature implementations | Select when BOM cost is primary constraint and EEPROM persistence is unnecessary. |
| STM8L151K4T6 | Ultra-low-power variant: 16 KB Flash, 2 KB RAM, 1 KB EEPROM, but max 16 MHz only at 3.3 V; different peripheral set (no LIN, no SmartCard) | Optimized for battery-powered devices; lacks LIN/SmartCard needed for automotive diagnostics or secure peripherals | Choose for energy-constrained designs requiring <350 nA stop mode; avoid if LIN or 5 V operation is required. |
Compared with STM8S003F3P6, the STM8S105S4T6C provides double Flash, integrated EEPROM, and 38 I/Os for scalable firmware and field calibration - versus STM8L151K4T6, it offers full 5 V tolerance and LIN/SmartCard support critical for industrial bus integration.
Availability
STM8S105S4T6C is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance UI subsystems, and motor drive supervision requiring stable component supply and long-term production continuity.
Supply support for STM8S105S4T6C 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 STM8S series targets cost-sensitive, high-reliability embedded applications demanding robust I/O, integrated analog, and proven toolchain support - optimized for rapid development of industrial control and appliance subsystems.
FAQ
What is the maximum operating frequency and voltage range for the STM8S105S4T6C?
The STM8S105S4T6C operates at up to 16 MHz across a supply voltage range of 2.95 V to 5.5 V. This allows direct compatibility with both 3.3 V and 5 V systems without level-shifting. The 16 MHz performance is guaranteed over the full industrial temperature range (–40 to +85 °C) and specified in the electrical characteristics section of DS5855 Rev 16.
Does the STM8S105S4T6C include hardware debug support, and how is it implemented?
Yes, it integrates the Single Wire Interface Module (SWIM) for in-circuit debugging and programming using only one dedicated pin (PD0). SWIM supports full breakpoint, step-through, and memory inspection capabilities via ST-LINK tools. No JTAG header or additional pins are required, reducing PCB footprint and simplifying test fixture design.
How many I/O pins support high-sink capability, and what is the rated current?
Sixteen I/O pins (PB0–PB7 and PE0–PE7) support high-sink capability with a guaranteed 20 mA output current per pin at VDD = 5 V. This enables direct driving of LEDs, small relays, or optocouplers without external driver transistors - verified in Table 38 and Figure 31–32 of the datasheet.
Is the data EEPROM truly persistent, and what are its endurance and retention specifications?
Yes, the 1 KB data EEPROM is true EEPROM (not emulated in Flash) with 300,000 write/erase cycles and 20-year data retention at 55 °C. These values are measured and guaranteed per JEDEC standards, and the memory retains data even during power loss - confirmed in Section 4.4 and Table 36 of DS5855 Rev 16.
STM8S105S4T6C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-LQFP
- Series:
- STM8S
- Packaging:
- Tray
- 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:
- 34
- 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 9x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105S4T6C FAQ
1.How can I place an order for STM8S105S4T6C through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105S4T6C 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 STM8S105S4T6C reliable?
The price and inventory of STM8S105S4T6C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105S4T6C is usually 5 days.
3.What payment methods are accepted for STM8S105S4T6C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105S4T6C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105S4T6C?
STM8S105S4T6C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105S4T6C 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 STM8S105S4T6C?
For technical support, including STM8S105S4T6C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105S4T6C requirements.
6.How does Aetrix verify that STM8S105S4T6C is sourced from the original manufacturer or authorized distributors?
All STM8S105S4T6C 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 STM8S105S4T6C meets industry standards.
7.What is the process for return or replacement of STM8S105S4T6C?
All STM8S105S4T6C units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105S4T6C, 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 STM8S105S4T6C part is unused and in its original packaging.
Return procedure for STM8S105S4T6C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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