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STM8L050J3 is member of the STM8L ultra-low-power 8-bit family.
STM8L050J3 features an enhanced STM8 CPU core providing increased processing power (up to 16 MIPS at 16 MHz) while maintaining the advantages of a CISC architecture with improved code density, a 24-bit linear addressing space and an optimized architecture for low-power operations.
The STM8L050J3 MCU includes an integrated debug module with a hardware interface (SWIM) which allows non-intrusive In-Application debugging and ultra-fast Flash programming. It features an embedded data EEPROM and low-power, low-voltage, single-supply program Flash memory.
The device incorporates an extensive range of enhanced I/Os and peripherals, a 12-bit ADC, two comparators, a real-time clock, two 16-bit timers, one 8-bit timer, as well as standard communication interfaces such as an SPI, an I2C interface, and one USART.
The modular design of the peripheral set allows this device to have the same peripherals that can be found in different ST microcontroller families including 32-bit families. This makes any transition to a different family very easy, supported also by the use of a common set of development tools.
STM8L050J3 as all the value line STM8L ultra-low-power products are based on the same architecture with the same memory mapping and a coherent pinout.Key Features
- Operating conditions
- Operating power supply: 1.8 V to 3.6 V Temperature range: -40 °C to 125 °C
- Low-power features
- 5 low-power modes: Wait, Low-power run (5.1 µA), Low-power wait (3 µA), Active-halt with RTC (1.3 µA), Halt (350 nA)
- Ultra-low leakage per I/O: 50 nA
- Fast wakeup from Halt: 5 µs
- Advanced STM8 core
- Harvard architecture and 3-stage pipeline
- Max freq: 16 MHz, 16 CISC MIPS peak
- Up to 6 external interrupt sources
- Reset and supply management
- Low power, ultra-safe BOR reset with 5 selectable thresholds
- Ultra-low power POR/PDR
- Programmable voltage detector (PVD)
- Clock management
- 32 kHz and 1 to 16 MHz crystal oscillators
- Internal 16 MHz factory-trimmed RC
- Internal 38 kHz low consumption RC
- Clock security system
- Low-power RTC
- BCD calendar with alarm interrupt
- Digital calibration with +/- 0.5 ppm accuracy
- LSE security system
- Auto-wakeup from Halt w/ periodic interrupt
- Memories
- 8 Kbytes of Flash program memory and 256 bytes of data EEPROM with ECC
- Flexible write and read protection modes
- 1 Kbyte of RAM
- DMA
- 4 channels supporting ADC, SPI, I2C, USART, timers
- 1 channel for memory-to-memory
- 12-bit ADC up to 1 Msps/4 channels
- Internal reference voltage
- Timers
- Two 16-bit timers with 2 channels (used as IC, OC, PWM), quadrature encoder
- One 8-bit timer with 7-bit prescaler
- 2 watchdogs: 1 Window, 1 Independent
- Beeper timer with 1, 2 or 4 kHz frequencies
- Communication interfaces
- Synchronous serial interface (SPI)
- Fast I2C 400 kHz SMBus and PMBus
- USART
- Up to 6 I/Os, all mappable on interrupt vectors
- Development support
- Fast on-chip programming and non-intrusive debugging with SWIM
- Bootloader using USART
- Two ultra-low-power comparators
- One with fixed threshold and another one with rail to rail
- Wakeup capability
- Operating conditions
Circuit Diagram
Featured Videos
We asked Christophe the following questions: - How is ST engaged in the 8-bit MCU market ? - What benefits does the STM8 bring? - What applications are suitable for STM8 (no change) - What kind of ecosystem does STM8 have?
8-bit microcontrollers for industrial and mass-market applications
Here is an opportunity to get to learn the basics of our STM8S value line !
Development Tools
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Picture Part number Manufacturer Description CYCLONE P&E Microcomputer Systems Automated, Stand-Alone Production Programmer, Debug & Test. CYCLONE FX P&E Microcomputer Systems Automated, Stand-Alone Production Programmer, Debug & Test. 
FlashPro Elprotronic Flash programmer for STM8 and ARM based MCUs. 
GangPro Elprotronic Gang programmer for STM8 and ARM based MCUs. Lauterbach PowerDebug for STM8 Lauterbach Debug Solution for STM8 series. 
ST-LINK/V2 ST ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 
STLINK-V3SET ST STLINK-V3 modular in-circuit debugger and programmer for STM32/STM8 Part NumberAutomated, Stand-Alone Production Programmer, Debug & Test.
Automated, Stand-Alone Production Programmer, Debug & Test.
Flash programmer for STM8 and ARM based MCUs.
Gang programmer for STM8 and ARM based MCUs.
Debug Solution for STM8 series.
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32
STLINK-V3 modular in-circuit debugger and programmer for STM32/STM8
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Picture Part number Manufacturer Description CXSTM8 Cosmic Software C Compiler and associated tools for the STM8 family FLASHER-STM8 ST STM8 Flash loader demonstrator (UM0462) IAR C-STAT IAR Systems Static analysis tool; add-on product to IAR Embedded Workbench IAR Embedded Workbench for STM8 IAR Systems Integrated Development Environment. IAR Embedded Workbench for STM8 - Functional Safety IAR Systems Integrated Development Environment. IAR Visual State IAR Systems State-machine modelling tool RIDE-STM8 Raisonance Raisonance branded integrated development environment for STM8 MCUs SENSE Fieldscale An end-to-end solution for the design, schematic capture, and system-level simulation of capacitive touch sensors. 
STM-STUDIO-STM8 ST STM Studio run-time variables monitoring and visualization tool for STM8 microcontrollers 
STM8CubeMX ST STM8Cube configuration and report tool STVD-STM8 ST ST Visual develop IDE for developing ST7 and STM8 applications STVP-LIB-STM8 ST STVP programming toolkit: C++ source files for creating PC programming interface STVP-STM8 ST ST Visual Programmer STM8 winIDEA-STM8 iSYSTEM iSYSTEM's complete software development and test solution for the STM8 MCUs Part NumberC Compiler and associated tools for the STM8 family
STM8 Flash loader demonstrator (UM0462)
Static analysis tool; add-on product to IAR Embedded Workbench
Integrated Development Environment.
Integrated Development Environment.
State-machine modelling tool
Raisonance branded integrated development environment for STM8 MCUs
An end-to-end solution for the design, schematic capture, and system-level simulation of capacitive touch sensors.
STM Studio run-time variables monitoring and visualization tool for STM8 microcontrollers
STM8Cube configuration and report tool
ST Visual develop IDE for developing ST7 and STM8 applications
STVP programming toolkit: C++ source files for creating PC programming interface
ST Visual Programmer STM8
iSYSTEM's complete software development and test solution for the STM8 MCUs
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Embedded Software
Evaluation Tools
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Picture Part number Manufacturer Description 
NUCLEO-8L152R8 ST STM8 Nucleo-64 development board with STM8L152R8 MCU, supports Arduino Uno and ST morpho connectivity 
STM8-SO8-DISCO ST Discovery kit with STM8L001J3,STM8L050J3,STM8S001J3 MCUs 
STM8L-DISCOVERY ST Discovery kit with STM8L152C6 MCU 
STM8L1528-EVAL ST Evaluation board with STM8L152M8 MCU Part NumberSTM8 Nucleo-64 development board with STM8L152R8 MCU, supports Arduino Uno and ST morpho connectivity
Discovery kit with STM8L001J3,STM8L050J3,STM8S001J3 MCUs
Discovery kit with STM8L152C6 MCU
Evaluation board with STM8L152M8 MCU
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Support and Applications
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STM8L050J3M3 |
Active
|
SO-8 | Industrial | Ecopack2 | |
| STM8L050J3M3TR |
Active
|
SO-8 | Industrial | 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$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| STM8L050J3M3TR | 2 distributors |
Active
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EAR99 | NEC | Tape And Reel | SO-8 | - | 125 | CHINA | 0.2571 / 10k | ||
| STM8L050J3M3 | 5 distributors | Buy now |
Active
|
EAR99 | NEC | Tube | SO-8 | - | 125 | CHINA | 0.2571 / 10k | |
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
0.2571 / 10k(*) 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
