Ultra-low-power 8-bit MCU with 64 Kbytes Flash, 16 MHz CPU, integrated EEPROM

The high-density and medium+ density STM8L15xx6/8 ultra-low-power devices feature 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 family includes an integrated debug module with a hardware interface (SWIM) which allows non-intrusive in-application debugging and ultrafast Flash programming.

All high-density and medium+ density STM8L15xx6/8 microcontrollers feature embedded data EEPROM and low-power low-voltage single-supply program Flash memory.

The devices incorporate an extensive range of enhanced I/Os and peripherals, a 12-bit ADC, two DACs, two comparators, a real-time clock, four 16-bit timers, one 8-bit timer, as well as standard communication interfaces such as two SPIs, an I2C interface, and three USARTs. A 8x40 or 4x44-segment LCD is available on the STM8L152x8 devices. The modular design of the peripheral set allows the same peripherals to be found in different ST microcontroller families including 32-bit families. This makes any transition to a different family very easy, and simplified even more by the use of a common set of development tools.

Key Features

  • Operating conditions
    • Operating power supply: 1.65 to 3.6 V (without BOR), 1.8 to 3.6 V (with BOR)
    • Temp. range: -40 to 85, 105 or 125 °C
  • Low-power features
    • 5 low-power modes: Wait, Low-power run (5.9 µA), Low-power wait (3 µA), Active-halt with full RTC (1.4 µA), Halt (400 nA)
    • Consumption: 200 µA/MHz+330 µA
    • Fast wake up from Halt mode (4.7 µs)
    • Ultra low leakage per I/0: 50 nA
  • Advanced STM8 core
    • Harvard architecture and 3-stage pipeline
    • Max freq: 16 MHz, 16 CISC MIPS peak
    • Up to 40 external interrupt sources
  • Reset and supply management
    • Low-power, ultra safe BOR reset with five programmable thresholds
    • Ultra-low-power POR/PDR
    • Programmable voltage detector (PVD)
  • Clock management
    • 32 kHz and 1-16 MHz crystal oscillators
    • Internal 16 MHz factory-trimmed RC and 38 kHz low consumption RC
    • Clock security system
  • Low-power RTC
    • BCD calendar with alarm interrupt,
    • Digital calibration with +/- 0.5ppm accuracy
    • Advanced anti-tamper detection
  • LCD: 8x40 or 4x44 w/ step-up converter
  • DMA
    • 4 ch. for ADC, DACs, SPIs, I2 C, USARTs, Timers, 1 ch. for memory-to-memory
  • 2x12-bit DAC (dual mode) with output buffer
  • 12-bit ADC up to 1 Msps/28 channels
    • Temp. sensor and internal ref. voltage
  • Memories
    • Up to 64 KB of Flash memory with up to 2KB of data EEPROM with ECC and RWW
    • Flexible write/read protection modes
    • Up to 4 KB of RAM
  • 2 ultra-low-power comparators
    • 1 with fixed threshold and 1 rail to rail
    • Wake up capability
  • Timers
    • Three 16-bit timers with 2 channels (IC, OC, PWM), quadrature encoder
    • One 16-bit advanced control timer with 3 channels, supporting motor control
    • One 8-bit timer with 7-bit prescaler
    • One window, one independent watchdog
    • Beeper timer with 1, 2 or 4 kHz frequencies
  • Communication interfaces
    • Two synchronous serial interface (SPI)
    • Fast I2 C 400 kHz SMBus and PMBus
    • Three USARTs (ISO 7816 interface + IrDA)
  • Up to 67 I/Os, all mappable on interrupt vectors
  • Up to 16 capacitive sensing channels supporting touchkey, proximity, linear touch and rotary touch sensors
  • Fast on-chip programming and non-intrusive debugging with SWIM, Bootloader using USART
  • 96-bit unique ID

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS6948 DS6948: 8-bit ultra-low-power MCU, up to 64 KB Flash, 2 KB data EEPROM, RTC, LCD, timers, USARTs, I2C, SPIs, ADC, DAC, comparators 10.0 2 MB
Application Notes
Description Version Size
AN3137 AN3137: Analog-to-digital converter on STM8L and STM8AL devices: description and precision improvement techniques 3.1 691 KB
AN1709 AN1709: EMC design guide for ST microcontrollers 2.0 843 KB
AN2860 AN2860: EMC guidelines for STM8 microcontrollers 5.1 262 KB
AN3960 AN3960: ESD considerations for touch sensing applications on MCUs 2.0 353 KB
AN1181 AN1181: Electrostatic discharge sensitivity measurement 1.6 49 KB
AN3029 AN3029: Getting started with STM8L and STM8AL 5.1 1 MB
AN4312 AN4312: Guidelines for designing touch sensing applications with surface sensors 3.0 1 MB
AN3236 AN3236: Guidelines to increase the number of touch sensing touchkeys 4.0 300 KB
AN3139 AN3139: Migration and compatibility guidelines for STM8L microcontroller applications 3.2 801 KB
AN3147 AN3147: Power management in STM8L and STM8AL 3.1 370 KB
AN3101 AN3101: STM8L05xxx/15xxx, STM8L162xx and STM8AL31xx/3Lxx internal RC oscillator calibration 6.0 429 KB
AN4310 AN4310: Sampling capacitor selection guide for MCU based touch sensing applications 3.0 208 KB
AN4316 AN4316: Tuning a STMTouch-based application 3.0 783 KB
AN3117 AN3117: Using the STM8L05xxx/15xxx, STM8L162xx, STM8AL31xx/3Lxx DMA controller 4.1 415 KB
AN3133 AN3133: Using the STM8L05xxx/STM8L101xx/STM8L15xxx/STM8L162xx/STM8AL31xx/STM8AL3Lxx real-time clock 5.2 600 KB
Technical Notes & Articles
Description Version Size
TN1163 TN1163: Description of WLCSP for microcontrollers and recommendations for its use 4.0 1 MB
TN0189 TN0189: STM8 bootloader frequently asked questions 2.4 320 KB
TN1205 TN1205: Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages 3.0 753 KB
TN1206 TN1206: Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages 3.0 830 KB
TN1207 TN1207: Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages 1.0 755 KB
TN1208 TN1208: Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages 1.0 743 KB
User Manuals
Description Version Size
UM0470 UM0470: STM8 SWIM communication protocol and debug module 4.0 606 KB
Reference Manuals
Description Version Size
RM0031 RM0031: STM8L050J3, STM8L051F3, STM8L052C6, STM8L052R8 MCUs and STM8L151/L152, STM8L162, STM8AL31, STM8AL3L lines 14.0 8 MB
Programming Manuals
Description Version Size
PM0054 PM0054: How to program STM8L and STM8AL Flash program memory and data EEPROM 9.1 240 KB
PM0044 PM0044: STM8 CPU programming manual 3.4 899 KB
Errata Sheets
Description Version Size
ES0131 ES0131: STM8AL318x, STM8AL3L8x, STM8AL3xE8x, STM8L052R8, STM8L15xx6/8 and STM8L162x8 device limitations 7.0 342 KB
Device Option Lists
Description Version Size
STM8L15x option list (32- to 64-Kbyte) 1.0 1 KB
STM8L15x option list (32- to 64-Kbyte) 1.0 1 KB

HW Model, CAD Libraries & SVD

HW Model, CAD Libraries & SVD
Description Version Size
STM8L CAD Symbol and Footprint files 1.1 2 MB

Presentations & Training Material

Description Version Size
Fire alarms and smoke detectors - Application guide 1.0 335 KB
STM32 and STM8 Functional Safety Packages 2 1 MB
STM32 and STM8 embedded software solutions 4.0 3 MB
STM8L and STM32 L1 series - Ultra-low-power platform 2.0 789 KB

Publications and Collaterals

Description Version Size
Get ready for the largest IoT development ecosystem 17.02 741 KB
STM8CubeMX eases STM8 configuration 1.0 532 KB
Description Version Size
STM8 8-bit MCU family 17.03 1 MB
Semiconductor solutions for healthcare applications 1.0 665 KB

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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
STM8L151C8T3 LQFP 48 7x7x1.4 Tray -40 125 Active 1.047 10000 NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
STM8L151C8U6TR UFQFPN 48 7x7x0.55 Tape And Reel -40 85 Active 0.91 10000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM8L151C8T6TR LQFP 48 7x7x1.4 Tape And Reel -40 85 Active 0.91 10000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM8L151C8T6 LQFP 48 7x7x1.4 Tray -40 85 Active 0.91 10000 NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
STM8L151C8U6 UFQFPN 48 7x7x0.55 Tray -40 85 Active 0.91 10000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM8L151C8U3 UFQFPN 48 7x7x0.55 Tray -40 125 Active 1.047 10000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM8L151C8T7 LQFP 48 7x7x1.4 Tray -40 105 Active 0.974 10000 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) 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**
STM8L151C8T3 ActiveLQFP 48 7x7x1.4-Ecopack2 0 0
STM8L151C8U6TR ActiveUFQFPN 48 7x7x0.55-Ecopack2 0 0
STM8L151C8T6TR ActiveLQFP 48 7x7x1.4-Ecopack2 0 0
STM8L151C8T6 ActiveLQFP 48 7x7x1.4-Ecopack2 0 0
STM8L151C8U6 ActiveUFQFPN 48 7x7x0.55-Ecopack2 0 0
STM8L151C8U3 ActiveUFQFPN 48 7x7x0.55-Ecopack2 0 0
STM8L151C8T7 ActiveLQFP 48 7x7x1.4-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.