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STMicroelectronics STM8S105C4T3
- Part No.:
- STM8S105C4T3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8S105C4T3.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
STM8S105C4T3 from STMicroelectronics is a production-grade 8-bit 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 operates from 2.95–5.5 V and targets cost-sensitive industrial control, appliance motor management, and sensor interface applications.
For engineers reviewing the STM8S105C4T3 datasheet, STM8S105C4T3 pinout, STM8S105C4T3 application, or STM8S105C4T3 equivalent, key selection criteria include Flash/E2PROM endurance (10 kcycles/300 kcycles), low-power mode support (wait/active-halt/halt), 16-bit advanced timer with dead-time insertion, and LQFP48 package compatibility with high-sink I/Os.
Technical Context
The STM8S105C4T3 implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution. Its clock system integrates four sources - 16 MHz internal RC (user-trimmable), 128 kHz low-power RC, external clock input, and crystal oscillator - with clock security monitoring.
Interrupt handling uses a nested controller supporting 32 vectors and up to 37 external interrupts across six priority levels. Memory subsystem includes separate program Flash (16 KB), true data EEPROM (1 KB), and RAM (1.5 KB), all with verified retention (20 years @ 55 °C) and endurance specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 16 MHz STM8 8-bit Harvard architecture with 3-stage pipeline and extended instruction set |
| Flash Memory | 16 KB program Flash with 20-year data retention at 55 °C after 10,000 write/erase cycles |
| Data EEPROM | 1 KB true data EEPROM with 300,000-cycle endurance for parameter storage |
| ADC | 10-bit ±1 LSB ADC with up to 10 multiplexed inputs, scan mode, and analog watchdog |
| Timers | 1x 16-bit advanced control timer (TIM1) with dead-time insertion; 2x 16-bit general-purpose timers (TIM2/TIM3); 1x 8-bit basic timer (TIM4) |
| Communication | UART with SmartCard/IrDA/LIN master support; SPI up to 8 Mbit/s; I²C up to 400 kbit/s |
| Supply Voltage | 2.95–5.5 V operation with built-in power-on/power-down reset and low-power modes |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 48 pins, including 38 user-configurable I/Os (16 high-sink capable), dedicated SWIM debug interface, and hardware reset (NRST).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital core and I/Os; VSS is common reference |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-pull or open-drain assertion |
| SWIM | Single-wire interface module | Debug and programming interface using one bidirectional pin (no dedicated clock) |
| 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 |
| PB0–PB7 | Port B general-purpose I/O | 8-bit port supporting SPI_CLK/MOSI/MISO, I²C_SCL/SDA, TIM2/TIM3 channels, and external interrupts |
| PC0–PC7 | Port C general-purpose I/O | 8-bit port with TIM1 complementary outputs, UART2_TX/RX, and high-sink capability on PC0–PC7 |
| PD0–PD7 | Port D general-purpose I/O | 8-bit port supporting TIM4, AWU, and additional ADC inputs; PD0–PD3 are high-sink capable |
| PE0–PE7 | Port E general-purpose I/O | 8-bit port with TIM1_BKIN, TIM2_ETR, and optional crystal oscillator connections (OSC_IN/OSC_OUT) |
Key Features
| Feature | Design Value |
|---|---|
| Low-power operation | Three configurable low-power modes (wait, active-halt, halt) with individual peripheral clock gating |
| Robust I/O design | Up to 16 high-sink I/Os (20 mA sink per pin) immune to current injection per IEC 61000-4-2 |
| Integrated timing resources | Dual watchdogs (independent + window), auto-wakeup timer, and flexible clock tree with trimmable 16 MHz RC |
| Secure debug interface | SWIM single-wire interface enables in-circuit programming and debugging without dedicated JTAG pins |
| Unique device identity | 96-bit factory-programmed unique ID accessible via memory-mapped register for firmware binding or licensing |
Applications
| Industrial Motor Control | Home Appliance Interface |
|---|---|
Use Scenario: Brushless DC motor commutation and speed regulation in HVAC blowers and washing machine drum drives. IC Role / Device Role / Timing Role: MCU executing FOC or trapezoidal commutation logic, sampling current/voltage via 10-bit ADC, generating PWM via TIM1 with dead-time insertion. Use Value: Integrated high-sink I/Os directly drive gate drivers; 1 KB EEPROM stores calibration data across 300k cycles; 16 MHz core ensures <1 µs interrupt latency for real-time loop closure. |
Use Scenario: User interface and sensor hub in smart refrigerators, managing touch keys, temperature sensors, and display backlight. IC Role / Device Role / Timing Role: Central control unit reading thermistors via ADC, driving LED segments via GPIO, and communicating with main controller over I²C. Use Value: 2.95–5.5 V operation supports wide-input SMPS; low-power halt mode extends standby battery life; SWIM enables field firmware updates without connector access. |
| Smart Metering Peripheral | Automotive Body Control |
Use Scenario: Tamper detection and auxiliary measurement in electricity meters, interfacing with shunt-based current sensing and optical pulse output. IC Role / Device Role / Timing Role: Secondary MCU monitoring metering IC status, validating ADC readings, and asserting tamper flags via isolated GPIO. Use Value: 10-bit ADC with analog watchdog detects out-of-range sensor drift; 16 KB Flash accommodates dual-bank firmware for safe OTA updates; NRST pin supports hardware reset coordination. |
Use Scenario: Door module control in entry-level vehicles, managing window lift, mirror adjustment, and interior lighting sequences. IC Role / Device Role / Timing Role: Local node executing LIN master protocol over UART, decoding switch inputs, and driving relays/motors via high-sink outputs. Use Value: LIN master mode eliminates need for external transceiver; 16 high-sink I/Os directly drive 12 V loads with 20 mA sink; EEPROM retains seat/mirror position settings across vehicle battery disconnects. |
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, LQFP32 package, same core and peripherals except TIM1 and ADC channel count | Suitable for simpler control tasks without EEPROM-based calibration or advanced motor timing | Select when cost and footprint are critical and EEPROM/data retention requirements are absent |
| STM8L052C6T6 | Ultra-low-power variant: 32 KB Flash, 2 KB RAM, 1 KB EEPROM, but 12 MHz max clock, different low-power architecture (wait/stop/standby) | Optimized for battery-powered sensor nodes requiring sub-µA sleep current, not industrial motor control | Choose only when energy-per-cycle efficiency outweighs real-time determinism and 16 MHz throughput needs |
Compared with STM8S105C4T3, STM8S003F3P6 reduces memory and eliminates EEPROM for lower BOM cost, while STM8L052C6T6 trades peak performance for deep-sleep efficiency-neither matches the balanced Flash/E2PROM/timing/performance profile required for appliance motor control.
Availability
STM8S105C4T3 is available at Aetrix Electronics and suitable for industrial motor control, home appliance interface, and smart metering peripheral applications requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade sourcing.
Supply support for STM8S105C4T3 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 discrete components for industrial, automotive, and consumer markets.
The STM8S series delivers cost-optimized 8-bit MCUs targeting resource-constrained embedded systems where reliability, Flash/E2PROM endurance, and integrated analog peripherals are essential-especially in white goods and industrial automation.
FAQ
What is the maximum operating frequency and voltage range of the STM8S105C4T3?
The STM8S105C4T3 operates at up to 16 MHz across a supply voltage range of 2.95 V to 5.5 V. Its internal 16 MHz RC oscillator is user-trimmable via calibration registers, and it supports external crystal (up to 24 MHz) or clock input. Electrical characteristics-including fCPUmax vs. VDD-are fully specified in Section 10.3.1 of DS5855 Rev 16.
Does the STM8S105C4T3 support in-circuit debugging and programming?
Yes, it features the Single-Wire Interface Module (SWIM), enabling full in-circuit debugging and programming using only one bidirectional pin (SWIM) and ground. No external debugger hardware is required beyond an ST-LINK/V2 or compatible programmer, and SWIM supports flash erase, read, write, and real-time variable inspection during execution.
How many I/O pins support high-sink capability, and what is the rated current?
The STM8S105C4T3 provides 16 high-sink I/Os: PC0–PC7 and PD0–PD3. Each supports 20 mA sink current at VDD = 5 V (typical), with guaranteed operation up to 15 mA under worst-case conditions per datasheet Table 38. This allows direct driving of LEDs, small relays, or gate drivers without external buffers.
Is the data EEPROM truly wear-leveled and how is its endurance validated?
The 1 KB data EEPROM is implemented as true EEPROM-not emulated in Flash-and is specified for 300,000 write/erase cycles with data retention of 20 years at 55 °C. Endurance and retention values are production-tested per JEDEC JESD22-A117 and documented in Section 10.3.5 of DS5855 Rev 16, with no software wear-leveling required by the host firmware.
STM8S105C4T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105C4T3 FAQ
1.How can I place an order for STM8S105C4T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105C4T3 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 STM8S105C4T3 reliable?
The price and inventory of STM8S105C4T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105C4T3 is usually 5 days.
3.What payment methods are accepted for STM8S105C4T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105C4T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105C4T3?
STM8S105C4T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105C4T3 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 STM8S105C4T3?
For technical support, including STM8S105C4T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105C4T3 requirements.
6.How does Aetrix verify that STM8S105C4T3 is sourced from the original manufacturer or authorized distributors?
All STM8S105C4T3 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 STM8S105C4T3 meets industry standards.
7.What is the process for return or replacement of STM8S105C4T3?
All STM8S105C4T3 units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105C4T3, 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 STM8S105C4T3 part is unused and in its original packaging.
Return procedure for STM8S105C4T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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