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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8S
Packaging Bulk | NULL
Core Processor STM8
Core Size 8-Bit
Speed 24MHz
Connectivity CANbus, I2C, IrDA, LINbus, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 38
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
EEPROM Size 2K x 8
RAM Size 6K x 8
Voltage - Supply (Vcc/Vdd) 2.95V ~ 5.5V
Data Converters A/D 10x10b SAR
Oscillator Type External, Internal
Operating Temperature -40°C ~ 125°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-LQFP (7x7)
Package / Case 48-LQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8S208CBT3 from STMicroelectronics is an 8-bit STM8 MCU with 128KB flash and 6KB RAM in a 48-LQFP package. It runs at 24MHz with 2.95V-5.5V supply, featuring brown-out detection, POR, PWM, and WDT for reliable control applications.

  • High-temperature operation up to 125°C extends application range.
  • 5V-tolerant I/O simplifies interfacing with legacy industrial logic.
  • 128KB flash provides ample space for firmware and data logging.
  • Integrated brown-out reset enhances system stability.

Automotive ECU Modules

The 125°C rating and 5V operation make it ideal for engine control and transmission sensors.

Industrial Motor Drives

24MHz speed and PWM channels enable precise speed control in 3-phase BLDC motors.

Power Tools

Robust I/O and WDT ensure reliable operation under vibration and voltage spikes.

HVAC Controllers

128KB flash supports complex thermostat algorithms and communication stacks.

Smart Sensors

Low-power modes and 6KB RAM allow efficient data processing in field transmitters.

Medical Monitoring Devices

Wide temperature range and 5V compatibility suit portable diagnostic equipment.

Q: What is the core architecture?
A: It uses the STM8 8-bit core running at 24MHz.
Q: What is the flash memory size?
A: It has 128KB of program flash.
Q: What is the operating temperature range?
A: It operates from -40°C to 125°C, suitable for high-temperature environments.
Q: Does it have brown-out detection?
A: Yes, it includes Brown-out Detect/Reset, POR, PWM, and WDT.
Base Product Number : STM8S208CBT3
125°C 128KB flash 48-LQFP 6KB RAM 8-bit MCU automotive CISC industrial PWM STM8
Q: What is the core architecture?
A: It uses the STM8 8-bit core running at 24MHz.
Q: What is the flash memory size?
A: It has 128KB of program flash.
Q: What is the operating temperature range?
A: It operates from -40°C to 125°C, suitable for high-temperature environments.
Q: Does it have brown-out detection?
A: Yes, it includes Brown-out Detect/Reset, POR, PWM, and WDT.