STMicroelectronics STM8AL3L66TCY

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8A
Packaging Tray |
Core Processor STM8A
Core Size 8-Bit
Speed 16MHz
Connectivity I2C, IrDA, LINbus, SPI, UART/USART
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O 29
Program Memory Size 32KB (32K x 8)
Program Memory Type FLASH
EEPROM Size 1K x 8
RAM Size 2K x 8
Voltage - Supply (Vcc/Vdd) 1.65V ~ 3.6V
Data Converters A/D 21x12b; D/A 1x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 125°C (TA)
Grade Automotive
Qualification AEC AEC-Q100
Mounting Type Surface Mount
Supplier Device Package 32-LQFP (7x7)
Package / Case 32-LQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8AL3L66TCY from STMicroelectronics is a low-power 8-bit MCU built on the STM8A core. It operates at up to 16MHz with 32KB flash and 2KB RAM, supporting 1.65V to 3.6V supplies. The 32-LQFP package includes DMA, PWM, and robust reset features, making it suitable for automotive and industrial applications.

  • Ultra-low voltage operation (1.65V) – enables direct battery operation without boost converters.
  • Extended temperature range (-40°C to 125°C) – reliable in automotive and industrial environments.
  • Integrated DMA and PWM – reduces CPU load for real-time control loops.
  • Compact 32-LQFP package – saves board space for space-constrained designs.

Battery-Powered Industrial Sensors

With a 1.65V minimum supply and low-power STM8A core, this MCU extends battery life in remote monitoring nodes.

Automotive Body Electronics

Rated for -40°C to 125°C, it handles harsh under-hood environments for lighting or window control modules.

Portable Medical Devices

The 16MHz core and 32KB flash enable compact firmware for glucose meters or pulse oximeters.

Smart Building Controllers

DMA and PWM support efficient HVAC actuator control while maintaining low quiescent current.

Industrial Actuator Drivers

Integrated WDT and brown-out reset ensure fail-safe operation in motorized valve systems.

Wearable Health Trackers

Small 32-LQFP footprint and 2KB RAM fit constrained designs for continuous vital-sign logging.

Q: What is the operating voltage range?
A: 1.65V to 3.6V, suitable for battery-powered applications.
Q: What is the maximum clock speed?
A: 16MHz, providing balanced performance for low-power MCU tasks.
Q: What package is available?
A: 32-LQFP, ideal for compact PCB designs.
Q: Does it include DMA and PWM?
A: Yes, it features DMA, PWM, plus POR, WDT, and brown-out detection.
Base Product Number : STM8AL3L66
16MHz 2KB RAM 32KB flash 8-bit MCU automotive battery-powered DMA industrial low-power LQFP-32 PWM STM8A
Q: What is the operating voltage range?
A: 1.65V to 3.6V, suitable for battery-powered applications.
Q: What is the maximum clock speed?
A: 16MHz, providing balanced performance for low-power MCU tasks.
Q: What package is available?
A: 32-LQFP, ideal for compact PCB designs.
Q: Does it include DMA and PWM?
A: Yes, it features DMA, PWM, plus POR, WDT, and brown-out detection.