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STMicroelectronics STM8S105K6T3C — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM8S105K6T3C 8-bit MCU, 16 MHz, 32 KB Flash, 32-LQFP

MPNSTM8S105K6T3C
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STMicroelectronics STM8S105K6T3C, STM8S series 8-bit MCU, 16MHz, 32KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 25 I/O, I²C/SPI/UART/LIN, 7x10b ADC, -40 to 125°C, 32-LQFP (7x7 mm), Tray.

$3.3500Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8S105K6T3C specifications
ParameterValue
SeriesSTM8S
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.95V ~ 5.5V
Operating temperature-40°C~125°C(TA)
Speed16MHz
PackageTray
RAM size2K x 8
Core size8-Bit
EEPROM size1K x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)25
Core processorSTM8
Case32-LQFP
Data convertersA/D 7x10b
Program memory size32KB (32K x 8)

Product details

It packs 32 KB of program Flash, 2 KB of SRAM, and 1 KB of data EEPROM — enough for moderate embedded control tasks like motor commutation, sensor fusion, or human-machine interface logic. The EEPROM is separate from the Flash, so calibration constants and configuration parameters survive firmware updates without a dedicated external memory.

The 16 MHz clock rate is the ceiling for this part. At that speed, single-cycle instruction execution on the STM8 pipeline gives roughly 16 MIPS. That is adequate for real-time control loops with loop times in the tens of microseconds — think BLDC sensorless commutation or a PID loop at 20 kHz.

Temperature range and supply — deployment envelope

Brown-out reset and POR are built in, so the part starts cleanly on power-up and resets before the rail drops out of spec.

Peripherals and I/O — what connects

Twenty-five general-purpose I/O pins are available in the 32-LQFP package. There is also a 7-channel 10-bit ADC for analog inputs like potentiometers, thermistors, or current-sense resistors. The PWM timer supports motor control and dimming applications.

Housed in a 32-lead LQFP with a 7x7 mm body and 0.8 mm pitch. The exposed pad is not present on this package variant, so all thermal dissipation goes through the leads. Standard LQFP footprint — no special layout rules beyond the usual 0.8 mm pitch routing. The Tray shipping medium means the parts arrive in antistatic trays, not tape-and-reel, which matters if your pick-and-place feeder is set up for tape only.

The base product number STM8 covers a family of pin-compatible density options, so if a future revision needs more Flash or RAM, the migration path stays within the same footprint.

Frequently asked questions

Is STM8S105K6T3C pin-to-pin compatible with STM8S105K4T3C?

Yes, the STM8S105Kx series shares the same 32-LQFP footprint and pinout across the Flash density options. The K4 variant has 16 KB Flash versus 32 KB on the K6; everything else — RAM, EEPROM, peripherals, supply range, temperature grade — is identical. A drop-in swap if the code fits the smaller Flash.