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STMicroelectronics STM8S208RBT3 — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM8S208RBT3 8-bit MCU, 128KB Flash, 24MHz, -40 to 125°C

MPNSTM8S208RBT3
Active

ST STM8S series 8-bit MCU, STM8S208RBT3, 128KB Flash, 6K x 8 RAM, 2K x 8 EEPROM, 24MHz, 52 I/O, CAN, I²C, SPI, UART, 64-LQFP, -40 to 125°C.

$6.5100Ref. price · indicative, final on quote
STMicroelectronics STM8S208RBT3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8S208RBT3 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)
Speed24MHz
PackageTube
RAM size6K x 8
Core size8-Bit
EEPROM size2K x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)52
Core processorSTM8
Case64-LQFP
Data convertersA/D 16x10b
Program memory size128KB (128K x 8)

Product details

What this 8-bit MCU brings to a control board

The STMicroelectronics STM8S208RBT3 is an 8-bit MCU built around the STM8 core, running at 24 MHz. It carries 128 KB of Flash program memory, 6 KB of RAM, and 2 KB of EEPROM — enough for moderate control firmware with field-update capability. The 52 general-purpose I/O lines and a 16-channel 10-bit ADC give it the peripheral count for sensor aggregation and actuator drive in a single chip.

Supply voltage range is 2.95 V to 5.5 V.

On-chip CAN and LIN interfaces make the STM8S208RBT3 a natural choice for automotive body modules — door controllers, seat adjusters, or HVAC blower nodes. The I²C, SPI, and UART ports handle sensor bridges and display panels. Brown-out detection and a watchdog timer are built in, so an external supervisor IC is optional for most applications.

Package is 64-LQFP (10x10 mm), surface-mount only.

Frequently asked questions

What is STM8S208RBT3's listed speed (24MHz) on this component line?

The core runs at 24 MHz, which is the maximum clock rate for this STM8S device. That throughput, combined with the 128 KB Flash and 6 KB RAM, suits it for real-time control loops in automotive and industrial applications.