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  • The STM8S105x4/6 access line 8-bit microcontrollers offer from 16 to 32 Kbyte Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual (RM0016) refers to devices in this family as medium-density. All devices of the STM8S105x4/6 access line provide the following benefits: reduced system cost, performance and robustness, short development cycles, and product longevity.

    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.
    Device performance is ensured by a 16 MHz CPU clock frequency and enhanced characteristics which include robust I/O, independent watchdogs (with a separate clock source), and a clock security system.
    Short development cycles are guaranteed due to application scalability across common family product architecture with compatible pinout, memory map and modular peripherals.
    Product longevity is ensured in the STM8S family thanks to their advanced core which is made in a state-of-the-art technology for applications with 2.95 V to 5.5 V operating supply.
    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: up to 32 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle
      • Data memory: up to 1 Kbyte true data EEPROM; endurance 300 kcycle
      • RAM: up to 2 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 37 external interrupts on 6 vectors
    • Timers
      • Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
      • 2x16-bit general purpose timer, with 2+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 10 multiplexed channels, scan mode and analog watchdog
    • I/Os
      • Up to 38 I/Os on a 48-pin package including 16 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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CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM8S105K4B6
Active
PDIP 32 .4S Industrial Ecopack2
STM8S105K4T3C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T3CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T6C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T6CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4U3A
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U3ATR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U6A
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U6ATR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2

STM8S105K4B6

Package:

PDIP 32 .4S

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PDIP 32 .4S

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T3C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T3CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T6C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T6CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U3A

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U3ATR

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U6A

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U6ATR

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.

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EAR99 NEC Tape And Reel LQFP 32 7x7x1.4 -40 85 MALAYSIA 0.6068 / 10k
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EAR99 NEC Tape And Reel UFQFPN 32 5x5x0.55 -40 125 CHINA 0.6591 / 10k

STM8S105K4U6A

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5731 / 10k

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ARROW EUROPE 180 0 Order Now
ARROW AMERICA 5490 2940 Order Now
MOUSER WORLDWIDE 1707 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

3280

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

180

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5490

Min.Order

2940

Region

AMERICA Order Now

MOUSER

Stock

1707

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tray

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.5731 / 10k

Country of Origin

CHINA

STM8S105K4T6C

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6068 / 10k

Distributor availability ofSTM8S105K4T6C

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3122 1 Order Now
COMPEL EUROPE 7752 1 Order Now
ARROW EUROPE 6010 0 Order Now
MOUSER WORLDWIDE 2041 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

3122

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

7752

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

6010

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2041

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tray

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.6068 / 10k

Country of Origin

MALAYSIA

STM8S105K4T3C

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6978 / 10k

Distributor availability ofSTM8S105K4T3C

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1482 1 Order Now
RS COMPONENTS EUROPE 5158 1 Order Now
MOUSER WORLDWIDE 1627 1 Order Now
Farnell Element14 EUROPE 1505 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1482

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5158

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

1627

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1505

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tray

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.6978 / 10k

Country of Origin

MALAYSIA

STM8S105K4U6ATR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5731 / 10k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.5731 / 10k

Country of Origin

CHINA

STM8S105K4T6CTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6068 / 10k

Distributor availability ofSTM8S105K4T6CTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1786 1 Order Now
ARROW EUROPE 19200 0 Order Now
MOUSER WORLDWIDE 5204 1 Order Now
Farnell Element14 EUROPE 2323 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1786

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

19200

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

5204

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2323

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.6068 / 10k

Country of Origin

MALAYSIA

STM8S105K4T3CTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6978 / 10k

Distributor availability ofSTM8S105K4T3CTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1670 1 Order Now
ARROW EUROPE 40800 0 Order Now
MOUSER WORLDWIDE 1929 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1670

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

40800

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1929

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

LQFP 32 7x7x1.4

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.6978 / 10k

Country of Origin

MALAYSIA

STM8S105K4B6

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6574 / 10k

Distributor availability ofSTM8S105K4B6

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 947 1 Order Now
RS COMPONENTS EUROPE 7280 1 Order Now
Newark Element14 AMERICA 197 0 Order Now
Farnell Element14 EUROPE 339 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

947

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

7280

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

197

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

339

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tube

Package

PDIP 32 .4S

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.6574 / 10k

Country of Origin

CHINA

STM8S105K4U3A

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6591 / 10k

Distributor availability ofSTM8S105K4U3A

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 1729 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

MOUSER

Stock

1729

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tray

Package

UFQFPN 32 5x5x0.55

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.6591 / 10k

Country of Origin

CHINA

STM8S105K4U3ATR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6591 / 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

0.6591 / 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