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STMicroelectronics STM8S003K3T6CTR — Microcontrollers & Processors (MCU / MPU / DSP)

STMicroelectronics STM8S003K3T6CTR 8-bit MCU, 16 MHz

MPNSTM8S003K3T6CTR
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STMicroelectronics STM8S003K3T6CTR, STM8S series 8-bit MCU, 16 MHz, 8 KB Flash, 1 KB RAM, 128 B EEPROM, 32-LQFP, -40°C to 85°C, 2.95 V to 5.5 V supply.

$1.7400Ref. price · indicative, final on quote
STMicroelectronics STM8S003K3T6CTR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8S003K3T6CTR specifications
ParameterValue
SeriesSTM8S
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.95V ~ 5.5V
Operating temperature-40°C~85°C(TA)
Speed16MHz
PackageTape & Reel (TR); Cut Tape (CT)
RAM size1K x 8
Core size8-Bit
EEPROM size128 x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)28
Core processorSTM8
Case32-LQFP
Data convertersA/D 4x10b
Program memory size8KB (8K x 8)

Product details

STM8S003K3T6CTR — 8-bit MCU for cost-sensitive control

The STMicroelectronics STM8S003K3T6CTR is an 8-bit microcontroller from the STM8S value line, built around the STM8 core running at 16 MHz.

Tight memory budget — plan the firmware map

With 8 KB Flash and 1 KB RAM, the firmware footprint must be lean. The 128-byte EEPROM handles calibration constants and configuration parameters without wearing the Flash. If the application grows beyond this memory envelope, consider stepping up to the STM8S003F3 variant with 8 KB Flash and 1 KB RAM in a smaller package, or the STM8S105 family for 16 KB Flash and 2 KB RAM.

That covers most indoor and outdoor equipment — appliance control panels, HVAC fan coils, LED lighting drivers, and basic motor drives.

Frequently asked questions

Does STM8S003K3T6CTR have an integrated ADC?

Yes, it includes a 4-channel 10-bit analog-to-digital converter. That covers basic sensor readout — thermistor, potentiometer, or current-sense voltage — without an external ADC.