My Inquiry
My Account
STMicroelectronics STM8S105K4T6CTR
- Part No.:
- STM8S105K4T6CTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8S105K4T6CTR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,601
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8S105K4T6CTR 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 - deployed in industrial sensor nodes, motor control modules, and smart appliance UI subsystems.
For engineers reviewing the STM8S105K4T6CTR datasheet, STM8S105K4T6CTR pinout, STM8S105K4T6CTR application, or STM8S105K4T6CTR equivalent, key selection criteria include Flash endurance (10 kcycles), EEPROM retention (20 years at 55 °C), low-power modes (halt/active-halt/wait), and LQFP48 package compatibility with SWIM debug interface.
Technical Context
The STM8S105K4T6CTR implements a Harvard-architecture 8-bit core with 3-stage pipeline and extended instruction set, supporting up to 16 MHz operation across 2.95–5.5 V supply. Its clock system integrates four sources: external crystal, external clock input, user-trimmable 16 MHz RC, and low-power 128 kHz RC - all monitored by a clock security system.
Interrupt handling uses a nested controller with 32 vectors and up to 37 external interrupt lines mapped across six priority levels. Memory subsystem includes separate program Flash (16 KB), true data EEPROM (1 KB, 300 kcycle endurance), and RAM (2 KB), all accessible via unified addressing with hardware protection options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline and extended instruction set - enables deterministic real-time execution and compact code density. |
| Max Clock Frequency | 16 MHz - supports real-time control loops with sub-62.5 ns instruction cycle time at full speed. |
| Flash Memory | 16 Kbyte - stores firmware with 20-year data retention at 55 °C after 10,000 write/erase cycles. |
| Data EEPROM | 1 Kbyte true EEPROM - retains calibration data or configuration settings across power cycles with 300,000 write endurance. |
| ADC Resolution & Channels | 10-bit SAR ADC with 10 multiplexed inputs - provides ±1 LSB INL for precision analog sensing in temperature or voltage monitoring. |
| Communication Peripherals | UART (with LIN/SmartCard/IrDA), SPI (up to 8 Mbit/s), I²C (up to 400 kbit/s) - enables interoperability with sensors, displays, and host controllers without external level shifters. |
| Supply Voltage Range | 2.95 V to 5.5 V - allows direct connection to 3.3 V or 5 V system rails without regulators in cost-sensitive designs. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; 48-pin quad flat layout optimized for PCB routing density and thermal dissipation in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD pins (pins 8, 29) and dual VSS pins (pins 9, 30) reduce IR drop and improve noise immunity in mixed-signal operation. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.2–5.5 V logic levels and supports external debounced pushbutton or supervisor IC integration. |
| SWIM | Single-wire interface module | Dedicated debug pin (pin 11) enabling in-circuit programming and real-time debugging using ST-LINK/V2 without JTAG header footprint. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE5 | General-purpose I/O ports | Up to 38 programmable I/Os including 16 high-sink outputs (20 mA) - suitable for driving LEDs, relays, or optocouplers directly. |
| CLK, DATA (I²C) | I²C bus interface | Open-drain pins (PB4/PB5) with internal pull-ups configurable via software - compliant with standard-mode (100 kbit/s) and fast-mode (400 kbit/s) I²C timing. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power clock sources | Integrated 128 kHz RC oscillator enables ultra-low-power wake-up timer operation (< 1 µA typical current) for battery-backed applications. |
| Hardware watchdogs | Dual independent watchdogs (IWDG + WWDG) provide fail-safe reset coverage: one for software hang detection, the other for windowed timeout enforcement. |
| Robust I/O design | I/Os withstand ±5 kV HBM ESD and resist current injection up to 100 mA - eliminates need for external TVS diodes in harsh industrial environments. |
| Unique 96-bit ID | Factory-programmed serial number per device - enables secure firmware binding, device authentication, and traceability in production line programming. |
| SWIM debug interface | Single-pin, non-intrusive debugging with full memory access and breakpoint support - reduces BOM cost and PCB area vs. traditional SWD/JTAG solutions. |
Applications
| Industrial Sensor Node | Smart Appliance UI |
|---|---|
Use Scenario: Standalone temperature/humidity monitor with local display and wireless uplink. IC Role / Device Role / Timing Role: Main MCU executing sensor acquisition, data filtering, display refresh, and UART-based BLE module control. Use Value: Integrated 10-bit ADC and 1 KB EEPROM store calibrated coefficients and last-read values across power loss without external components. | Use Scenario: Keypad-driven control panel for washing machine or HVAC system. IC Role / Device Role / Timing Role: User interface processor managing button scan, LED feedback, buzzer alerts, and communication with main controller via I²C. Use Value: 38 GPIOs with 16 high-sink outputs drive LEDs and buzzers directly; low-power wait mode extends standby battery life. |
| Brushless DC Motor Control | Energy Metering Subsystem |
Use Scenario: 3-phase BLDC driver board with Hall-effect commutation and overcurrent protection. IC Role / Device Role / Timing Role: Timing-critical commutation controller using TIM1 advanced timer with dead-time insertion and complementary PWM outputs. Use Value: Hardware dead-time generation prevents shoot-through in gate drivers; 16 MHz core ensures < 1 µs loop jitter for stable RPM regulation. | Use Scenario: AC mains monitoring module measuring voltage, current, and power factor in smart meter designs. IC Role / Device Role / Timing Role: Analog front-end coordinator acquiring synchronized samples via ADC scan mode and computing RMS values before transmission. Use Value: 10-channel ADC with analog watchdog detects overvoltage events autonomously; UART supports DLMS/IEC 62056 protocol framing. |
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, no EEPROM, LQFP20 package, single 10-bit ADC channel | Suitable for simpler control tasks without nonvolatile parameter storage or multi-sensor input | Select when BOM cost and board space are critical and EEPROM/ADC channel count can be reduced. |
| STM8L052C6T6 | Ultra-low-power variant (1.65–3.6 V), 32 KB Flash, 2 KB RAM, but no high-sink I/Os | Optimized for battery-powered IoT endpoints requiring sub-µA sleep current and longer runtime | Choose for energy harvesting or coin-cell applications where active power efficiency outweighs I/O drive strength. |
Compared with STM8S105K4T6CTR, STM8S003F3P6 trades EEPROM and ADC channels for lower cost and smaller footprint, while STM8L052C6T6 sacrifices I/O sink capability and supply voltage range to achieve 10× lower active current - making each optimal for distinct power, feature, and cost constraints.
Availability
STM8S105K4T6CTR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance UIs, and BLDC motor control modules requiring stable component supply and long-term manufacturing continuity.
Supply support for STM8S105K4T6CTR 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, reliability-critical embedded applications - delivering robust 8-bit performance with integrated peripherals, low-power modes, and production-ready toolchains for rapid deployment in factory automation and home appliances.
FAQ
What debug interface does STM8S105K4T6CTR support?
The STM8S105K4T6CTR uses the Single-Wire Interface Module (SWIM) for in-circuit programming and debugging. It requires only one dedicated pin (SWIM on pin 11) and works with ST-LINK/V2 or compatible debuggers. No JTAG header or additional signals are needed, reducing PCB complexity and enabling field firmware updates via UART bootloader fallback if required.
Does STM8S105K4T6CTR support hardware CRC calculation?
No, the STM8S105K4T6CTR does not include a dedicated hardware CRC peripheral. CRC computation must be implemented in firmware using the provided 8-bit ALU instructions. However, its 16 MHz core and optimized instruction set allow efficient software CRC-8 or CRC-16 routines with typical execution times under 20 µs per 32-byte block.
Can STM8S105K4T6CTR operate from a 3.3 V supply with full 16 MHz performance?
Yes - the STM8S105K4T6CTR guarantees full 16 MHz operation across its entire specified supply range of 2.95 V to 5.5 V. Electrical characteristics tables (Section 10.3.1) confirm fCPUmax = 16 MHz at VDD = 3.3 V, with typical current consumption of 6.2 mA in run mode, enabling direct integration into 3.3 V systems without frequency derating.
How many I²C buses does STM8S105K4T6CTR support?
The STM8S105K4T6CTR integrates one hardware I²C interface (I²C1), accessible on PB4 (SCL) and PB5 (SDA) in the LQFP48 package. It supports standard-mode (100 kbit/s) and fast-mode (400 kbit/s) operation with built-in clock stretching, arbitration, and 7-bit/10-bit addressing - sufficient for connecting multiple sensors, EEPROMs, or display controllers on a single bus.
STM8S105K4T6CTR 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:
- 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 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S105K4T6CTR FAQ
1.How can I place an order for STM8S105K4T6CTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S105K4T6CTR 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 STM8S105K4T6CTR reliable?
The price and inventory of STM8S105K4T6CTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S105K4T6CTR is usually 5 days.
3.What payment methods are accepted for STM8S105K4T6CTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S105K4T6CTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S105K4T6CTR?
STM8S105K4T6CTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S105K4T6CTR 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 STM8S105K4T6CTR?
For technical support, including STM8S105K4T6CTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S105K4T6CTR requirements.
6.How does Aetrix verify that STM8S105K4T6CTR is sourced from the original manufacturer or authorized distributors?
All STM8S105K4T6CTR 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 STM8S105K4T6CTR meets industry standards.
7.What is the process for return or replacement of STM8S105K4T6CTR?
All STM8S105K4T6CTR units undergo pre-shipment inspection (PSI). If there is an issue with STM8S105K4T6CTR, 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 STM8S105K4T6CTR part is unused and in its original packaging.
Return procedure for STM8S105K4T6CTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8S105K4T6CTR Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
