Mainstream Application specific line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROM

The STM8S903K3/F3 access line 8-bit microcontrollers offer 8 Kbyte Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual (RM0016) refers to devices in this family as low-density. They provide the following benefits: performance, robustness, and reduced system cost.

Device performance and robustness are ensured by advanced core and peripherals made in a state-of-the art technology, a 16 MHz clock frequency, robust I/Os, independent watchdogs with separate clock source, and a clock security system.

The system cost is reduced thanks to an integrated true data EEPROM for up to 300 k write/erase cycles and a high system integration level with internal clock oscillators, watchdog and brown-out reset.

Full documentation is offered as well as a wide choice of development tools.

Key Features

  • Core
    • 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline
    • Extended instruction set
  • Memories
    • Program memory: 8 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle
    • Data memory: 640 byte true data EEPROM; endurance 300 kcycle
    • RAM: 1 Kbyte
  • Clock, reset and supply management
    • 2.95 to 5.5 V operating voltage
    • Flexible clock control, 4 master clock sources
      • Low power crystal resonator oscillator
      • External clock input
      • Internal, user-trimmable 16 MHz RC
      • Internal low-power 128 kHz RC
    • Clock security system with clock monitor
    • Power management:
      • Low-power modes (wait, active-halt, halt)
      • Switch-off peripheral clocks individually
    • Permanently active, low-consumption power-on and power-down reset
  • Interrupt management
    • Nested interrupt controller with 32 interrupts
    • Up to 28 external interrupts on 7 vectors
  • Timers
    • Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
    • 16-bit general purpose timer, with 3 CAPCOM channels (IC, OC or PWM)
    • 8-bit basic timer with 8-bit prescaler
    • Auto wake-up timer
    • Window watchdog and independent watchdog timers
  • Communication interfaces
    • UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode
    • SPI interface up to 8 Mbit/s
    • I2C interface up to 400 kbit/s
  • Analog to digital converter (ADC)
    • 10-bit, ±1 LSB ADC with up to 7 multiplexed channels + 1 internal channel, scan mode and analog watchdog
    • Internal reference voltage measurement
  • I/Os
    • Up to 28 I/Os on a 32-pin package including 21 high sink outputs
    • Highly robust I/O design, immune against current injection
  • Unique ID
    • 96-bit unique key for each device

Circuit Diagram

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Resources

Technical Documentation

Product Specifications
Description Version Size
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 12.0 1 MB
Application Notes
Description Version Size
Audio software codec for the STM8S 1.3 250 KB
Displaying variable voltage on a bar of LEDs using STM8S-DISCOVERY 1.3 148 KB
EMC design guide for ST microcontrollers 2.0 843 KB
EMC guidelines for STM8 microcontrollers 5.1 262 KB
Electrostatic discharge sensitivity measurement 1.6 49 KB
Getting started with the STM8S and STM8A 5.2 2 MB
Guidelines to increase the number of touch sensing touchkeys 4.0 300 KB
Microstepping motor drive with STM8A and STM8S microcontrollers 1.3 284 KB
Migration and compatibility guidelines for STM8S microcontroller applications 1.4 525 KB
Oscillator design guide for STM8AF/AL/S and STM32 microcontrollers 11.0 2 MB
RS232 communications with a terminal using the STM8S-DISCOVERY 1.2 299 KB
STM8AF and STM8S series HSI oscillator calibration using LIN automatic resynchronization 2.0 247 KB
STM8S DALI slave library 1.2 392 KB
STM8S and STM32™ MCUs: a consistent 8/32-bit product line for painless migration 1.3 212 KB
STM8S and STM8A family power management 3.2 268 KB
STM8S and STM8A high speed internal oscillator calibration 2.2 195 KB
Smartcard interface with the STM8S microcontroller 2.4 442 KB
Using the analog to digital converter of the STM8S microcontroller 2.5 183 KB
Technical Notes & Articles
Description Version Size
Description of WLCSP for microcontrollers and recommendations for its use 4.0 1 MB
STM8 bootloader frequently asked questions 2.4 320 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages 3.0 753 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages 3.0 830 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages 1.0 755 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages 1.0 743 KB
Reference Manuals
Description Version Size
STM8S Series and STM8AF Series 8-bit microcontrollers 14.0 9 MB
Programming Manuals
Description Version Size
How to program STM8S and STM8A Flash program memory and data EEPROM 3.4 191 KB
STM8 CPU programming manual 3.4 899 KB
Errata Sheets
Description Version Size
STM8S001J3, STM8S003xx, STM8S103xx and STM8S903xx device limitations 5.0 262 KB
Device Option Lists
Description Version Size
STM8S903 option list (4- to 8-Kbyte) 2.0 1 KB
Design Notes & Tips
Description Version Size
A three phase induction motor drive using a V/F control 2.1 528 KB

HW Model, CAD Libraries & SVD

HW Model, CAD Libraries & SVD
Description Version Size
STM8S CAD Symbol and Footprint files 1.3 1 MB

Presentations & Training Material

Presentations
Description Version Size
STM32 and STM8 Functional Safety Packages 2 1 MB
STM32 and STM8 embedded software solutions 3.2 2 MB

Publications and Collaterals

Flyers
Description Version Size
Get ready for the largest IoT development ecosystem 17.02 741 KB
STM8CubeMX eases STM8 configuration 1.0 532 KB
Brochures
Description Version Size
STM8 8-bit MCU family 17.03 1 MB

Quality & Reliability

Product Certifications
Description Version Size
VDE certification for STM8S ClassB f/w 1.0 1 MB
VDE certification for STM8S ClassB f/w 1.0 1 MB

Tools and Software

Development Tools
Hardware Development Tools
Software Development Tools
Embedded Software
MCUs Embedded Software
Evaluation Tools
Product Evaluation Tools
Support & Community


Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STM8S903F3P6 TSSOP 20 Tube -40 85 Active 0.486 10000 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3P3 TSSOP 20 Tube -40 125 Active 0.559 10000 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3U3TR UFQFPN 20 3x3x0.6 Tape And Reel -40 125 Active 0.559 10000 NEC EAR99 PHILIPPINES MORE INFO No availability reported, please contact our Sales office
STM8S903F3M3 SO-20 Tube -40 125 Active 0.628 10000 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3M6TR SO-20 Tape And Reel -40 85 Active 0.546 10000 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3M6 SO-20 Tube -40 85 Active 0.546 10000 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3P6TR TSSOP 20 Tape And Reel -40 85 Active 0.486 10000 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
STM8S903F3U6TR UFQFPN 20 3x3x0.6 Tape And Reel -40 85 Active 0.486 10000 NEC EAR99 PHILIPPINES MORE INFO No availability reported, please contact our Sales office
STM8S903F3M3TR SO-20 Tape And Reel -40 125 Active 0.628 10000 NEC EAR99 MALAYSIA MORE INFO No availability reported, please contact our Sales office
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM8S903F3P6 ActiveTSSOP 20IndustrialEcopack2 0 0
STM8S903F3P3 ActiveTSSOP 20IndustrialEcopack2 0 0
STM8S903F3U3TR ActiveUFQFPN 20 3x3x0.6IndustrialEcopack2
STM8S903F3M3 ActiveSO-20IndustrialEcopack1 0
STM8S903F3M6TR ActiveSO-20IndustrialEcopack1
STM8S903F3M6 ActiveSO-20IndustrialEcopack1
STM8S903F3P6TR ActiveTSSOP 20IndustrialEcopack2 0 0
STM8S903F3U6TR ActiveUFQFPN 20 3x3x0.6IndustrialEcopack2 0
STM8S903F3M3TR ActiveSO-20IndustrialEcopack1 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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