STMicroelectronics STM8S903K3U3TR

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8S
Packaging Tape & Reel (TR) | Tape & Reel (TR)
Core Processor STM8
Core Size 8-Bit
Speed 16MHz
Connectivity I2C, IrDA, LINbus, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 28
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
EEPROM Size 640 x 8
RAM Size 1K x 8
Voltage - Supply (Vcc/Vdd) 2.95V ~ 5.5V
Data Converters A/D 7x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 125°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Supplier Device Package 32-UFQFPN (5x5)
Package / Case 32-UFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8S903K3U3TR from STMicroelectronics is an 8-bit MCU with an STM8 core running at 16MHz. It offers 8KB flash and 1KB RAM, operating from 2.95V to 5.5V. The 32-UFQFN package with exposed pad supports high-temperature environments up to 125°C, ideal for automotive and industrial control.

  • High-temperature operation: 125°C rating for harsh environments.
  • Compact package: 32-UFQFN with exposed pad for better heat dissipation.
  • Wide voltage range: 2.95V-5.5V simplifies power supply design.
  • Fast 16MHz core: adequate for real-time control applications.

Automotive Actuators

High-temperature rating and PWM control make it suitable for valve and motor drivers.

Industrial Sensors

Robust I/O and ADC interface with pressure, flow, and proximity sensors.

Power Tools

16MHz speed and 5.5V operation handle brushless motor commutation.

Smart Meters

Low power consumption and WDT ensure reliable long-term operation.

LED Lighting Drivers

Multiple PWM channels enable precise current control for high-brightness LEDs.

Consumer Electronics

Compact UFQFN package fits into small form-factor devices like e-cigarettes and wearables.

Q: What is the core architecture?
A: STM8 8-bit core running at up to 16MHz.
Q: What is the supply voltage?
A: 2.95V to 5.5V, suitable for 3.3V and 5V systems.
Q: What is the package?
A: 32-UFQFN with exposed pad for improved thermal performance.
Q: Does it support high temperatures?
A: Yes, -40°C to 125°C for automotive and industrial use.
Base Product Number : STM8S903K3
125°C 16MHz 32-UFQFN 8-bit MCU ADC automotive industrial PWM STM8 STMicroelectronics
Q: What is the core architecture?
A: STM8 8-bit core running at up to 16MHz.
Q: What is the supply voltage?
A: 2.95V to 5.5V, suitable for 3.3V and 5V systems.
Q: What is the package?
A: 32-UFQFN with exposed pad for improved thermal performance.
Q: Does it support high temperatures?
A: Yes, -40°C to 125°C for automotive and industrial use.