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quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
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quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
quality STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU factory
>

STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU

Product Summary

Looking for a stable MCU supply and smarter cost reduction for your next-gen electronics? The STMicroelectronics STM8S903K3 and STM8S903F3 are high-performance 8-bit microcontrollers featuring a 16 MHz core and 8 Kbytes Flash, making them ideal for automotive systems.

Product Custom Attributes

Highlight:

STM8S903K3

,

STM8S903K3 16MHz 8-bit MCU

,

Automotive Grade STM8S Microcontroller IC

Design Now

Basic Properties

Place of Origin:
China
Brand Name:
STMicroelectronics
Certification:
UL,FCC,CE,RoHS
Model Number:
STM8S903K3 STM8S903F3

Product Description

16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM,10-bit ADC, 2 timers, UART, SPI, I²C


STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU

STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU

STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU



STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU



STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU

STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU

STM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCUSTM8S903K3 STM8S903F3 16 MHz STM8S 8-bit MCU




We don’t just sell hardware components; we deliver tailored MCU firmware design and full BOM optimization. Tell us your product ideas, and we’ll turn them into fully customized, cost-effective PCBA solutions


  • Don't let semiconductor component shortages halt your production. We offer STM8S903K3/F3 MCUs alongside full BOM auditing, PCBA layout optimization, and high-quality packaging services to maximize your competitive edge.

  • We specialize in resource integration for new energy and electronic products. Rely on our 17 years of trade expertise to supply authentic STM8S903F3 MCUs and re-engineer your cost structure for maximum ROI.


Overall Rating
5.0
★★★★★
★★★★★
Based on 50 reviews recently
5 star
100%
4 star
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All Reviews
  • M
    Mike
    United States Jul 30.2026
    ★★★★★
    ★★★★★
    During the project development process, the supplier not only provided component support but also offered ODM solution suggestions based on our PCBA design requirements, including circuit selection, layout optimization, and cost control, which improved development efficiency.
  • K
    Kemal
    Mexico Jul 20.2026
    ★★★★★
    ★★★★★
    We partnered with them for a 10kWh home energy storage system, and the result was excellent. The stackable design, custom OEM support, and BOM optimization helped us launch a reliable product faster and within budget.
  • T
    Taylor
    Switzerland Jul 16.2026
    ★★★★★
    ★★★★★
    Their custom wire harness service is excellent. They always understand our different requirements and deliver internal cable assemblies that fit our new energy products perfectly. Great customization capability and reliable quality.

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