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Automotive 8-bit ultra-low-power MCU with 64 Kbytes Flash, LIN, RTC, LCD, data EEPROM, timers, USARTs, I2C, SPIs, ADC, DAC, COMPs

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Product overview


The high-density STM8AL3x8x 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 STM8AL3x8x 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, 8x40 or 4x44-segment LCD, four 16-bit timers, one 8-bit timer, as well as standard communication interfaces such as two SPIs, an I2C interface, and three USARTs. One 8x40 or 4x44-segment LCD is available on the STM8AL3L8x 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.

  • All features

    • AEC-Q100 grade 1 qualified
    • Operating conditions
      • Operating power supply range 1.8 V to 3.6 V (down to 1.65 V at power down)
      • Temp. range: -40 to 85 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 5 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
    • DMA
      • 4 ch. for ADC, DACs, SPIs, I2C, USARTs, Timers, 1 ch. for memory-to-memory
    • LCD: 8x40 or 4x44 w/ step-up converter
    • 12-bit ADC up to 1 Msps / 28 channels,
      • Temp. sensor and internal ref. voltage
    • Memories
      • Up to 64 Kbytes of Flash with up to 2 Kbytes of data EEPROM with ECC and RWW
      • Flexible write/read protection modes
      • Up to 4 Kbytes of RAM
    • 2x12-bit DAC (dual mode) with output buffer
    • 2 ultra-low-power comparators
      • 1 with fixed threshold and 1 rail to rail
      • Wakeup 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 and one independent watchdog
      • Beeper timer with 1, 2 or 4 kHz frequencies
    • Communication interfaces
      • Two synchronous serial interface (SPI)
      • Fast I2C 400 kHz SMBus and PMBus
      • Three USARTs (IrDA, LIN 1.3, LIN2.0)
    • Up to 67 I/Os, all mappable on interrupt vectors
    • Fast on-chip programming and non-intrusive debugging with SWIM, Bootloader using USART
    • 96-bit unique ID

Circuit Diagram

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STMicroelectronics - STM8AL3L89

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LQFP 64 10x10x1.4 mm Automotive Ecopack2



LQFP 64 10x10x1.4 mm

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LQFP 64 10x10x1.4 mm



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(**) The Material Declaration forms available on 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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