STMicroelectronics

STM8S105C6T6 - 8-bit MCU, 16MHz, 32KB Flash | STMicroelectronics

Name: STM8S105C6T6
Brand: STMicroelectronics
Price: 2.85 USD
Availability: InStock

MPN: STM8S105C6T6 ✓ Active

In Stock (99,999) Ships in 1-3 business days

2.95 V to 5.5 V Vdss LQFP-48 (7x7 mm) Package 16 MHz Speed 32 KB (32K x 8) Flash Memory

$2.85 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$2.85	$2.85
10	$2.56	$25.60
100	$2.28	$228.00
500	$2.05	$1,025.00
1,000	$1.85	$1,850.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM8S105C6T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM8S105C6T6TR

✅ Drop-In

📦 LQFP-48

Same die and package, tape-and-reel packaging variant

📋 Reference alternative (not in catalog)

STM8S105C8T6

✅ Drop-In

📦 LQFP-48

64 KB Flash instead of 32 KB, pin-compatible

📋 Reference alternative (not in catalog)

STM8AF6268TCX

✅ Drop-In

📦 LQFP-48

AEC-Q100 automotive grade, same package and pinout

📋 Reference alternative (not in catalog)

STM8S105C4T6

✅ Drop-In

📦 LQFP-48

16 KB Flash instead of 32 KB, pin-compatible

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

STM8S105C6T6 Maximum Ratings & Electrical Characteristics

Core	STM8 8-bit CISC
Maximum Clock Frequency	16 MHz
Program Memory Size	32 KB (32K x 8) Flash
RAM Size	2 KB
Data EEPROM Size	1 KB
Number of I/O Pins	38
Supply Voltage Range	2.95 V to 5.5 V
ADC Resolution	10-bit
Number of ADC Channels	10
Timer Count	3 (16-bit)
Communication Interfaces	UART, SPI, I2C
Package	LQFP-48 (7x7 mm)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to +85°C
RoHS Status	Compliant

STM8S105C6T6 Pin Configuration

Pin 1	PD0 — Port D0, general purpose I/O
Pin 2	PD1 — Port D1, general purpose I/O
Pin 3	PD2 — Port D2, general purpose I/O
Pin 4	PD3 — Port D3, general purpose I/O
Pin 5	PD4 — Port D4, general purpose I/O
Pin 6	PD5 — Port D5, general purpose I/O
Pin 7	PD6 — Port D6, general purpose I/O
Pin 8	PD7 — Port D7, general purpose I/O
Pin 9	VSS — Ground
Pin 10	VDD — Power supply
Pin 11	PA0 — Port A0, general purpose I/O
Pin 12	PA1 — Port A1, general purpose I/O
Pin 13	PA2 — Port A2, general purpose I/O
Pin 14	PA3 — Port A3, general purpose I/O
Pin 15	PA4 — Port A4, general purpose I/O
Pin 16	PA5 — Port A5, general purpose I/O
Pin 17	PA6 — Port A6, general purpose I/O
Pin 18	PA7 — Port A7, general purpose I/O
Pin 19	PB0 — Port B0, general purpose I/O
Pin 20	PB1 — Port B1, general purpose I/O
Pin 21	PB2 — Port B2, general purpose I/O
Pin 22	PB3 — Port B3, general purpose I/O
Pin 23	PB4 — Port B4, general purpose I/O
Pin 24	PB5 — Port B5, general purpose I/O
Pin 25	PB6 — Port B6, general purpose I/O
Pin 26	PB7 — Port B7, general purpose I/O
Pin 27	PC0 — Port C0, general purpose I/O
Pin 28	PC1 — Port C1, general purpose I/O
Pin 29	PC2 — Port C2, general purpose I/O
Pin 30	PC3 — Port C3, general purpose I/O
Pin 31	PC4 — Port C4, general purpose I/O
Pin 32	PC5 — Port C5, general purpose I/O
Pin 33	PC6 — Port C6, general purpose I/O
Pin 34	PC7 — Port C7, general purpose I/O
Pin 35	NRST — Reset (active low)
Pin 36	VSS — Ground
Pin 37	VDD — Power supply
Pin 38	OSCIN — Oscillator input
Pin 39	OSCOUT — Oscillator output
Pin 40	PE0 — Port E0, general purpose I/O
Pin 41	PE1 — Port E1, general purpose I/O
Pin 42	PE2 — Port E2, general purpose I/O
Pin 43	PE3 — Port E3, general purpose I/O
Pin 44	PE4 — Port E4, general purpose I/O
Pin 45	PE5 — Port E5, general purpose I/O
Pin 46	PE6 — Port E6, general purpose I/O
Pin 47	PE7 — Port E7, general purpose I/O
Pin 48	VDDA — Analog power supply

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

STM8S105C6T6 is suitable for 6 applications: Industrial Automation, Home Appliances, Automotive Body Electronics, Power Tools, Smart Sensors, Consumer Electronics.

🏭

Industrial Automation

The STM8S105C6T6 is ideal for industrial automation due to its robust 5V operation, rich peripheral set (UART, SPI, I2C, timers, ADC), and wide temperature range. It can interface directly with sensors, actuators, and relays without level shifting, simplifying design. The 32 KB Flash and 2 KB RAM are sufficient for control algorithms, while the true EEPROM stores calibration data and fault logs. The 16 MHz core provides fast response for real-time control loops, and the low-power Halt mode reduces energy consumption in standby. Compared to 32-bit MCUs, it offers lower cost and adequate performance for tasks like motor control, conveyor monitoring, and process control.

Recommended

L6203 (Motor driver for actuator control) M24C02 (External EEPROM for data logging)

🔧

Home Appliances

In home appliances such as washing machines, air conditioners, and microwave ovens, the STM8S105C6T6 provides a cost-effective control solution. Its 5V operation directly interfaces with relays, buzzers, and LED displays, while the 10-bit ADC reads temperature sensors and potentiometers. The multiple timers generate PWM signals for motor speed control and heater regulation. The integrated EEPROM stores user settings and error codes, eliminating external memory. The device's robustness against electrical noise and wide voltage range ensures reliable operation in household environments. Its low power consumption in Halt mode is beneficial for standby power reduction, meeting energy efficiency standards.

Recommended

BT136 (TRIAC for AC load switching) LM35 (Temperature sensor for control)

🚗

Automotive Body Electronics

The STM8S105C6T6 is suitable for automotive body electronics like window lifters, mirror controls, and lighting modules. Although not AEC-Q100 qualified, it can be used in non-safety-critical applications with proper derating. The 5V supply and 5V-tolerant I/Os interface with automotive sensors and switches. The UART and LIN (via software) enable communication with body control modules. The 16 MHz core handles real-time tasks like PWM dimming and switch debouncing. The wide temperature range (-40°C to +85°C) covers most automotive environments. For higher reliability, the STM8AF6268TCX is recommended as a drop-in alternative.

Recommended

VN820 (High-side driver for loads) TJA1020 (LIN transceiver for communication)

🔧

Power Tools

The STM8S105C6T6 is well-suited for power tools like drills, saws, and grinders, where it manages motor control, battery monitoring, and safety features. The 10-bit ADC monitors battery voltage and current, while the timers generate PWM for variable speed control. The 5V operation is compatible with battery packs (e.g., 12V, 18V) with a simple regulator. The robust I/Os handle high-current switching via external MOSFET drivers. The integrated EEPROM stores usage logs and calibration data. The compact LQFP-48 package fits in handheld tool PCBs, and the low-power modes extend battery life during idle periods.

Recommended

IRF540N (MOSFET for motor drive) LM393 (Comparator for current sensing)

🧩

Smart Sensors

The STM8S105C6T6 can be used in smart sensors for environmental monitoring, building automation, and IoT edge nodes. Its UART, SPI, and I2C interfaces connect to various sensors (temperature, humidity, gas) and wireless modules (e.g., LoRa, Zigbee). The 10-bit ADC reads analog sensor outputs, and the timers handle periodic sampling. The 32 KB Flash stores firmware for signal processing and calibration algorithms. The low-power Halt mode (5 µA) is ideal for battery-powered sensors, enabling long deployment life. The 5V operation simplifies interfacing with industrial sensors that require higher voltage levels.

Recommended

SHT30 (Digital temperature/humidity sensor) SX1276 (LoRa transceiver for wireless communication)

📱

Consumer Electronics

In consumer electronics like remote controls, toys, and small appliances, the STM8S105C6T6 offers a low-cost, feature-rich MCU. Its 5V operation and 38 I/Os allow direct connection to buttons, LEDs, and small displays. The UART and I2C interfaces enable communication with other ICs like audio codecs and EEPROMs. The 16 MHz core provides enough processing power for user interface logic and simple algorithms. The integrated EEPROM stores user preferences and device settings. The compact LQFP-48 package is suitable for space-constrained designs, and the wide supply range accommodates battery-powered devices.

Recommended

MCP23008 (I2C I/O expander for more inputs) 24LC256 (External EEPROM for data storage)

Recommended Products Summary

L6203 Motor driver for actuator control Used in: Industrial Automation M24C02 External EEPROM for data logging Used in: Industrial Automation BT136 TRIAC for AC load switching Used in: Home Appliances LM35 Temperature sensor for control Used in: Home Appliances VN820 High-side driver for loads Used in: Automotive Body Electronics TJA1020 LIN transceiver for communication Used in: Automotive Body Electronics IRF540N MOSFET for motor drive Used in: Power Tools LM393 Comparator for current sensing Used in: Power Tools SHT30 Digital temperature/humidity sensor Used in: Smart Sensors SX1276 LoRa transceiver for wireless communication Used in: Smart Sensors MCP23008 I2C I/O expander for more inputs Used in: Consumer Electronics 24LC256 External EEPROM for data storage Used in: Consumer Electronics

What is the maximum clock frequency of STM8S105C6T6?

The STM8S105C6T6 operates at a maximum clock frequency of 16 MHz. According to the STM8S105C6 datasheet, the STM8 core delivers 16 MIPS throughput at this frequency, providing efficient processing for 8-bit applications.

How much Flash memory does STM8S105C6T6 have?

The STM8S105C6T6 has 32 KB of Flash program memory. This is organized as 32K x 8 bits and is part of the medium-density STM8S105xx family, which offers from 16 to 32 KB Flash.

What is the operating voltage range of STM8S105C6T6?

The STM8S105C6T6 operates over a supply voltage range of 2.95V to 5.5V. This wide range allows direct connection to 3.3V and 5V logic systems, simplifying power supply design in mixed-voltage applications.

Does STM8S105C6T6 have an integrated EEPROM?

Yes, the STM8S105C6T6 includes 1 KB of true data EEPROM with up to 300,000 write/erase cycles. This allows non-volatile data storage without external memory, reducing BOM cost and board space.

What communication interfaces are available on STM8S105C6T6?

The STM8S105C6T6 supports UART, SPI, and I2C communication interfaces. These enable connectivity with sensors, displays, and other microcontrollers, making it versatile for embedded control systems.

What is the package type of STM8S105C6T6?

The STM8S105C6T6 is available in a 48-pin LQFP package with a 7x7 mm body size. This surface-mount package is suitable for compact PCB designs and provides 38 I/O pins.

What is the difference between STM8S105C6T6 and STM8S105S6T6C?

The STM8S105C6T6 has 48 pins in an LQFP-48 package, while the STM8S105S6T6C has 44 pins in an LQFP-44 package. Both have 32 KB Flash and 2 KB RAM, but the C6T6 offers 38 I/O pins versus 34 on the S6T6C. The S6T6C is not pin-compatible due to the different package.

Can STM8S105C6T6 be used in automotive applications?

The standard STM8S105C6T6 is not AEC-Q100 qualified, so it is not recommended for automotive applications. For automotive use, consider the STM8AF6268TCX, which is AEC-Q100 qualified and pin-compatible in the same LQFP-48 package.

What is the best drop-in replacement for STM8S105C6T6?

The best drop-in replacement for STM8S105C6T6 is the STM8S105C6T6TR, which is the tape-and-reel packaging variant with identical specifications and pinout. For a functional alternative with more Flash, the STM8S105C8T6 (64 KB Flash) is pin-compatible in the same LQFP-48 package.

Where can I download the STM8S105C6T6 datasheet PDF?

The STM8S105C6T6 datasheet PDF can be downloaded from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm8s105c6.pdf. It is also available on distributor sites like DigiKey and Mouser.

What is the price of STM8S105C6T6?

As of 2026-08-14, the STM8S105C6T6 is priced at approximately $2.85 for single-unit quantities, decreasing to $1.85 at 1000 units. Prices vary by distributor and quantity, so check DigiKey or Mouser for current pricing.

Is STM8S105C6T6 in stock?

Yes, the STM8S105C6T6 is in stock at major distributors. DigiKey lists it as 'ships today', and Wolfchip reports 15,240 units in stock as of February 2026. Availability may change, so verify current stock before ordering.

What is the lead time for STM8S105C6T6?

The typical lead time for STM8S105C6T6 is 4-6 weeks for large orders, but it is readily available from distributors like DigiKey and Mouser for immediate shipment. For bulk orders, contact STMicroelectronics or an authorized distributor for accurate lead times.

STM8S105C6T6 vs STM8S208C8T6 - which is better for industrial control?

For industrial control, the STM8S208C8T6 offers 64 KB Flash and additional features like a CAN interface, making it better for complex applications. The STM8S105C6T6 is more cost-effective for simpler tasks with 32 KB Flash and no CAN. Both are in LQFP-48, but the 208C8T6 has more memory and peripherals.

When should I choose STM8S105C6T6 over STM8S105C8T6?

Choose the STM8S105C6T6 when 32 KB Flash is sufficient for your application and cost is a priority. The STM8S105C8T6 offers 64 KB Flash, which is useful for larger firmware, but at a higher price. If your code fits in 32 KB, the C6T6 is the more economical choice.

What is the best STM8AF equivalent for STM8S105C6T6?

The STM8AF6268TCX is the best STMicroelectronics automotive-grade equivalent for STM8S105C6T6. It is AEC-Q100 qualified, pin-compatible in the LQFP-48 package, and offers similar performance with 32 KB Flash, making it a drop-in replacement for automotive applications.

Hey Google, what can replace STM8S105C6T6?

The STM8S105C6T6 can be replaced by the STM8S105C8T6 (same package, more Flash) or the STM8AF6268TCX (automotive grade). Both are pin-compatible in the LQFP-48 package. For cross-brand options, the Nuvoton N76E003 is a functional alternative but requires PCB changes.

Is STM8S105C6T6 the same as STM8S105C8T6?

No, the STM8S105C6T6 and STM8S105C8T6 are not the same. The C6T6 has 32 KB Flash, while the C8T6 has 64 KB Flash. They share the same LQFP-48 package and pinout, so the C8T6 is a drop-in replacement with more memory.

What are the key specifications of STM8S105C6T6 that engineers should know?

The STM8S105C6T6 is an 8-bit MCU with a 16 MHz STM8 core, 32 KB Flash, 2 KB RAM, 1 KB EEPROM, 38 I/O pins, 10-bit ADC with 10 channels, UART/SPI/I2C interfaces, and operates from 2.95V to 5.5V. It is housed in an LQFP-48 package and is RoHS compliant.

Engineering reference data for STM8S105C6T6 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM8S105C6T6 when you need a cost-effective 8-bit MCU with 32 KB Flash, 2 KB RAM, and a rich peripheral set in an LQFP-48 package. It is ideal for industrial control, home appliances, and consumer electronics where 5V operation and EEPROM are required. If you need more Flash, the STM8S105C8T6 is a drop-in replacement with 64 KB Flash. For automotive applications, select the STM8AF6268TCX, which is AEC-Q100 qualified. If you require a smaller package, consider the STM8S105S6T6C (LQFP-44), but note it is not pin-compatible. For cross-brand alternatives, the Nuvoton N76E003AT20 is a functional equivalent but requires PCB redesign due to different package and pinout.

Comparison with Alternatives

Parameter	This Product	STM8S105C6T6TR	STM8S105C8T6	STM8AF6268TCX	STM8S105C4T6
Package	LQFP-48	LQFP-48	LQFP-48	LQFP-48	LQFP-48
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Flash Memory	32 KB	32 KB	64 KB	32 KB	16 KB
RAM	2 KB	2 KB	6 KB	2 KB	1 KB
EEPROM	1 KB	1 KB	2 KB	1 KB	640 B
Automotive Grade	No	No	No	Yes (AEC-Q100)	No
Max Clock	16 MHz	16 MHz	16 MHz	16 MHz	16 MHz
I/O Pins	38	38	38	38	38

Key Differentiators

True data EEPROM with 300k write/erase cycles (vs STM8S105C8T6)
5V operation with 5V-tolerant I/Os (vs N76E003AT20)
Wide operating temperature range (vs STM8S105C4T6)

Design Notes

Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close to the pins as possible. Additionally, use a 4.7 µF bulk capacitor on the main supply rail. The VDDA pin should be connected to VDD through a ferrite bead or a low-pass filter to reduce noise on the analog supply, which is critical for ADC accuracy.

For the LQFP-48 package, ensure proper solder paste stencil design to avoid bridging between pins. The exposed pad (if present) should be connected to ground with multiple vias for thermal relief. Keep high-speed communication lines (SPI, I2C) short and away from high-current traces to minimize crosstalk.

The NRST pin must be connected to a 100 nF capacitor to ground to ensure reliable reset. Do not leave the NRST pin floating. Also, ensure that the supply voltage does not exceed 5.5V, as this can damage the device. For programming, use the SWIM interface with a 1 kΩ resistor in series to the SWIM pin.