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  • 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

Download Download

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EDA Symbols, Footprints and 3D Models

STMicroelectronics - STM8S903K3

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM8S903K3B6
Active
PDIP 32 .4S Industrial Ecopack2
STM8S903K3T3C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S903K3T3CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S903K3T6C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S903K3T6CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S903K3U3
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S903K3U3TR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S903K3U6
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S903K3U6TR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2

STM8S903K3B6

Package:

PDIP 32 .4S

Material Declaration**:

Marketing Status

Active

Package

PDIP 32 .4S

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3T3C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3T3CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3T6C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3T6CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3U3

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3U3TR

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3U6

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S903K3U6TR

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
STM8S903K3T3C Available at 1 distributors

Distributor availability ofSTM8S903K3T3C

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Region Stock Min. Order Third party link
Farnell Element14 EUROPE 6 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

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Region

EUROPE Order Now

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Buy Direct
Active
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EAR99 NEC Tray UFQFPN 32 5x5x0.55 -40 85 CHINA 0.4888 / 10k
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DIGIKEY WORLDWIDE 889 1 Order Now
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Distributor Name

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Stock

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Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

930

Min.Order

1

Region

WORLDWIDE Order Now

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Stock

464

Min.Order

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Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-27

Free Sample Buy Direct
Active
EAR99 NEC Tube PDIP 32 .4S -40 85 CHINA 0.5731 / 10k
STM8S903K3T3CTR Available at 2 distributors

Distributor availability ofSTM8S903K3T3CTR

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DIGIKEY WORLDWIDE 2200 1 Order Now
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Buy Direct
Active
EAR99 NEC Tape And Reel LQFP 32 7x7x1.4 -40 125 MALAYSIA 0.6009 / 10k
STM8S903K3U3TR No availability of distributors reported, please contact our sales office Buy Direct
Active
EAR99 NEC Tape And Reel UFQFPN 32 5x5x0.55 -40 125 CHINA 0.5621 / 10k
STM8S903K3T6CTR Available at 1 distributors

Distributor availability ofSTM8S903K3T6CTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2195 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

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Stock

2195

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

Active
EAR99 NEC Tape And Reel LQFP 32 7x7x1.4 -40 85 MALAYSIA 0.5225 / 10k
STM8S903K3U6TR Available at 4 distributors

Distributor availability ofSTM8S903K3U6TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3000 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
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MOUSER WORLDWIDE 2000 1 Order Now

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Distributor Name

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Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

15000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

Buy Direct
Active
EAR99 NEC Tape And Reel UFQFPN 32 5x5x0.55 -40 85 CHINA 0.4888 / 10k
STM8S903K3U3 Available at 1 distributors

Distributor availability ofSTM8S903K3U3

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 100 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

MOUSER

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

Buy Direct
Active
EAR99 NEC Tray UFQFPN 32 5x5x0.55 -40 125 CHINA 0.5621 / 10k

STM8S903K3T3C

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6009 / 10k

Distributor availability ofSTM8S903K3T3C

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 6 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

Farnell Element14

Stock

6

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tray

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.6009 / 10k

Country of Origin

MALAYSIA

STM8S903K3T6C

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5225 / 10k

Distributor availability ofSTM8S903K3T6C

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1386 1 Order Now
MOUSER WORLDWIDE 2335 1 Order Now
Farnell Element14 EUROPE 915 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

DIGIKEY

Stock

1386

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2335

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

915

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tray

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.5225 / 10k

Country of Origin

MALAYSIA

STM8S903K3U6

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.4888 / 10k

Distributor availability ofSTM8S903K3U6

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2934 1 Order Now
FUTURE WORLDWIDE 2940 2940 Order Now
MOUSER WORLDWIDE 2942 1 Order Now

Distributor reported inventory date: 2020-11-27

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Stock

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Min.Order

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Region

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2940

Min.Order

2940

Region

WORLDWIDE Order Now

MOUSER

Stock

2942

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tray

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.4888 / 10k

Country of Origin

CHINA

STM8S903K3B6

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5731 / 10k

Distributor availability ofSTM8S903K3B6

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 889 1 Order Now
Newark Element14 AMERICA 134 0 Order Now
MOUSER WORLDWIDE 930 1 Order Now
Farnell Element14 EUROPE 464 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

DIGIKEY

Stock

889

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

134

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

930

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

464

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tube

Package

PDIP 32 .4S

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.5731 / 10k

Country of Origin

CHINA

STM8S903K3T3CTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6009 / 10k

Distributor availability ofSTM8S903K3T3CTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2200 1 Order Now
MOUSER WORLDWIDE 937 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

DIGIKEY

Stock

2200

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

937

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.6009 / 10k

Country of Origin

MALAYSIA

STM8S903K3U3TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5621 / 10k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.5621 / 10k

Country of Origin

CHINA

STM8S903K3T6CTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5225 / 10k

Distributor availability ofSTM8S903K3T6CTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2195 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

DIGIKEY

Stock

2195

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.5225 / 10k

Country of Origin

MALAYSIA

STM8S903K3U6TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.4888 / 10k

Distributor availability ofSTM8S903K3U6TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3000 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW EUROPE 15000 0 Order Now
MOUSER WORLDWIDE 2000 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

DIGIKEY

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

15000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.4888 / 10k

Country of Origin

CHINA

STM8S903K3U3

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5621 / 10k

Distributor availability ofSTM8S903K3U3

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 100 1 Order Now

Distributor reported inventory date: 2020-11-27

Distributor Name

MOUSER

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-27

ECCN (EU)

NEC

Packing Type

Tray

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.5621 / 10k

Country of Origin

CHINA

(*) 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