STM8AL3166TAY - 8-bit Ultra-Low-Power MCU, 32KB Flash | STMicroelectronics
MPN: STM8AL3166TAY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.92 | $29.20 |
| 100 | $2.6 | $260.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.08 | $2,080.00 |
Drop-in alternatives for STM8AL3166TAY β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM8AL3168TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3166TAX
β Drop-Inπ Reference alternative (not in catalog)
STM8L151C6T6
β Drop-Inπ Reference alternative (not in catalog)
S9KEAZN32ACLC
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3166TAY Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Maximum Frequency | 16 MHz |
| Flash Memory | 32 KB |
| RAM | 2 KB |
| EEPROM | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V |
| Operating Temperature | -40Β°C to +125Β°C |
| Package | LQFP-48 (7x7 mm) |
| Mounting Type | Surface Mount |
| ADC | 12-bit, up to 16 channels |
| Comparators | 2 |
| Timers | 1x 16-bit, 1x 12-bit |
| Communication Interfaces | SPI, I2C, UART |
| RTC | Yes |
| Low Power Modes | Wait, Active-Halt, Halt |
| Halt Mode Current | 0.6 Β΅A (typical) |
| RoHS Status | Compliant |
STM8AL3166TAY Pin Configuration
| Pin 1 | VSS β Ground |
| Pin 2 | VDD β Power supply |
| Pin 3 | PA0 β GPIO/ADC input |
| Pin 4 | PA1 β GPIO/ADC input |
| Pin 5 | PA2 β GPIO/ADC input |
| Pin 6 | PA3 β GPIO/ADC input |
| Pin 7 | PA4 β GPIO/ADC input |
| Pin 8 | PA5 β GPIO/ADC input |
| Pin 9 | PA6 β GPIO/ADC input |
| Pin 10 | PA7 β GPIO/ADC input |
| Pin 11 | PB0 β GPIO/SPI |
| Pin 12 | PB1 β GPIO/SPI |
| Pin 13 | PB2 β GPIO/SPI |
| Pin 14 | PB3 β GPIO/SPI |
| Pin 15 | PB4 β GPIO/I2C |
| Pin 16 | PB5 β GPIO/I2C |
| Pin 17 | PB6 β GPIO/UART |
| Pin 18 | PB7 β GPIO/UART |
| Pin 19 | PC0 β GPIO/ADC |
| Pin 20 | PC1 β GPIO/ADC |
| Pin 21 | PC2 β GPIO/ADC |
| Pin 22 | PC3 β GPIO/ADC |
| Pin 23 | PC4 β GPIO/ADC |
| Pin 24 | PC5 β GPIO/ADC |
| Pin 25 | PC6 β GPIO/ADC |
| Pin 26 | PC7 β GPIO/ADC |
| Pin 27 | PD0 β GPIO |
| Pin 28 | PD1 β GPIO |
| Pin 29 | PD2 β GPIO |
| Pin 30 | PD3 β GPIO |
| Pin 31 | PD4 β GPIO |
| Pin 32 | PD5 β GPIO |
| Pin 33 | PD6 β GPIO |
| Pin 34 | PD7 β GPIO |
| Pin 35 | PE0 β GPIO |
| Pin 36 | PE1 β GPIO |
| Pin 37 | PE2 β GPIO |
| Pin 38 | PE3 β GPIO |
| Pin 39 | PE4 β GPIO |
| Pin 40 | PE5 β GPIO |
| Pin 41 | PE6 β GPIO |
| Pin 42 | PE7 β GPIO |
| Pin 43 | NRST β Reset |
| Pin 44 | VDD β Power supply |
| Pin 45 | VSS β Ground |
| Pin 46 | OSC_IN β Crystal oscillator input |
| Pin 47 | OSC_OUT β Crystal oscillator output |
| Pin 48 | VDD β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM8AL3166TAY is suitable for 6 applications: Automotive Body Control Module, Battery Management System, Industrial Sensor Node, Portable Medical Device, Smart Home Sensor, Portable Instrumentation.
Automotive Body Control Module
The STM8AL3166TAY is ideal for automotive body control modules due to its AEC-Q100 qualification, wide temperature range (-40Β°C to +125Β°C), and low-power modes. It can manage lighting, window lifts, and door locks with its rich GPIO and timer peripherals. The 12-bit ADC enables precise analog sensing for switch inputs and potentiometer feedback. Its UART and LIN interfaces allow communication with other vehicle modules. The low-power Halt mode (0.6 Β΅A) ensures minimal battery drain when the vehicle is off. The EEPROM stores calibration data and fault codes, while the RTC provides time-stamping for events. The robust BOR and PVD ensure reliable operation under voltage fluctuations. The STM8A core's efficient code density reduces memory requirements, lowering BOM cost. The LQFP-48 package fits compact PCB layouts in door modules and central body controllers. The device's 16 MHz clock provides sufficient processing power for real-time control loops. The integrated comparators can detect overcurrent conditions, enhancing safety. Overall, the STM8AL3166TAY delivers a cost-effective, reliable solution for automotive body electronics.
Recommended
Battery Management System
The STM8AL3166TAY is well-suited for battery management systems (BMS) in portable and automotive applications. Its 12-bit ADC with up to 16 channels can monitor individual cell voltages and temperatures. The low-power modes extend battery life, with Halt mode consuming only 0.6 Β΅A. The wide operating voltage range (1.8V-3.6V) matches typical Li-ion battery voltages. The EEPROM stores calibration and state-of-charge data. The UART interface allows communication with a host controller or BMS IC. The comparators can trigger overvoltage/undervoltage protection. The RTC provides time-stamping for charge/discharge cycles. The STM8A core's low power consumption and high integration reduce external component count. The device's robust BOR ensures reliable operation during battery voltage dips. The LQFP-48 package is compact for space-constrained BMS PCBs. The 16 MHz clock enables fast ADC sampling and processing. The device's automotive-grade temperature range (-40Β°C to +125Β°C) suits harsh environments. Overall, the STM8AL3166TAY provides a reliable, low-power MCU for BMS applications.
Recommended
Industrial Sensor Node
The STM8AL3166TAY is an excellent choice for industrial sensor nodes that require low power and high reliability. Its 12-bit ADC can interface with various analog sensors, such as temperature, pressure, and strain gauges. The SPI and I2C interfaces allow connection to digital sensors and memory. The UART enables communication with industrial networks via RS-485 or wireless modules. The low-power modes are critical for battery-powered or energy-harvesting nodes, with Halt mode at 0.6 Β΅A. The wide operating temperature range (-40Β°C to +125Β°C) ensures operation in harsh industrial environments. The EEPROM stores sensor calibration data and node configuration. The RTC provides time-stamping for data logging. The STM8A core's efficient instruction set reduces code size, lowering memory costs. The integrated comparators can detect threshold crossings for alarm generation. The device's robust BOR and PVD protect against power supply glitches. The LQFP-48 package is suitable for compact sensor modules. The 16 MHz clock provides adequate processing for sensor fusion algorithms. Overall, the STM8AL3166TAY offers a low-power, reliable MCU for industrial sensor applications.
Recommended
Portable Medical Device
The STM8AL3166TAY is suitable for portable medical devices such as glucose meters, pulse oximeters, and wearable health monitors. Its ultra-low-power modes (0.6 Β΅A in Halt) extend battery life, which is critical for patient convenience. The 12-bit ADC can process signals from biosensors, such as photodiodes and electrodes. The I2C interface connects to external sensor ICs and displays. The UART allows data transfer to a smartphone or PC. The wide operating voltage range (1.8V-3.6V) supports coin-cell batteries. The EEPROM stores patient data and device settings. The RTC provides time-stamping for measurements. The STM8A core's low power consumption and high integration reduce PCB size and cost. The device's robust BOR ensures reliable operation during battery discharge. The LQFP-48 package is compact for wearable designs. The 16 MHz clock enables real-time signal processing. The integrated comparators can detect abnormal signals. Overall, the STM8AL3166TAY provides a low-power, reliable MCU for portable medical devices.
Recommended
Smart Home Sensor
The STM8AL3166TAY is ideal for smart home sensors like motion detectors, temperature sensors, and smart locks. Its low-power modes enable battery-powered operation for years. The 12-bit ADC can interface with analog sensors, while the I2C/SPI interfaces connect to digital sensors. The UART allows communication with Wi-Fi or Zigbee modules. The RTC provides time-stamping for events. The EEPROM stores configuration and event logs. The wide operating voltage range (1.8V-3.6V) supports battery power. The STM8A core's low power consumption and high integration reduce BOM cost. The device's robust BOR ensures reliable operation. The LQFP-48 package is compact for sensor modules. The 16 MHz clock provides sufficient processing for sensor algorithms. The integrated comparators can detect threshold crossings for alarm generation. Overall, the STM8AL3166TAY offers a low-power, cost-effective MCU for smart home applications.
Recommended
Portable Instrumentation
The STM8AL3166TAY is well-suited for portable instrumentation such as multimeters, data loggers, and handheld test equipment. Its 12-bit ADC provides accurate measurements, and the low-power modes extend battery life. The UART and SPI interfaces allow data logging and communication with external memory. The RTC provides time-stamping for logged data. The EEPROM stores calibration constants. The wide operating voltage range (1.8V-3.6V) supports battery operation. The STM8A core's efficient code density reduces memory requirements. The device's robust BOR ensures reliable operation. The LQFP-48 package is compact for handheld devices. The 16 MHz clock enables fast sampling and processing. The integrated comparators can detect overrange conditions. Overall, the STM8AL3166TAY provides a low-power, reliable MCU for portable instrumentation.
Recommended
Recommended Products Summary
Engineering reference data for STM8AL3166TAY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AL3168TAY | STM8AL3166TAX | STM8L151C6T6 | S9KEAZN32ACLC |
|---|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors |
| Core | STM8A 8-bit | STM8A 8-bit | STM8A 8-bit | STM8L 8-bit | ARM Cortex-M0+ |
| Flash Memory | 32 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Max Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 48 MHz |
| Operating Voltage | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V | 2.7V - 5.5V |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | No (industrial) | No | Yes (AEC-Q100) |
Key Differentiators
- Automotive-grade qualification (AEC-Q100) (vs STM8L151C6T6)
- Ultra-low-power Halt mode (0.6 Β΅A) (vs S9KEAZN32ACLC)
- Wide operating voltage range (1.8V-3.6V) (vs S9KEAZN32ACLC)
Design Notes
Decouple each VDD pin with a 100nF ceramic capacitor placed as close as possible to the pin, and add a 4.7Β΅F bulk capacitor at the main power entry. The STM8AL3166TAY operates from 1.8V to 3.6V; ensure the supply is stable and within this range. Use a low-dropout regulator if powering from a higher voltage rail. The brown-out reset (BOR) threshold is programmable, so configure it to match your system's minimum voltage to prevent erratic operation.
For the RTC, place a 32.768 kHz crystal with 12.5pF load capacitors on OSC_IN and OSC_OUT pins, keeping traces short and away from high-speed signals. For the ADC, provide a clean analog ground and route analog inputs away from digital switching noise. Use a star-ground topology to minimize ground bounce. The LQFP-48 package has an exposed pad (EP) that should be soldered to a ground plane for improved thermal performance.
Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups to avoid excessive leakage current. When using the EEPROM, note that it has a limited write endurance (typically 100k cycles), so implement wear leveling if frequent writes are expected. The Halt mode current of 0.6 Β΅A is typical at 25Β°C; at higher temperatures, leakage increases, so account for this in battery life calculations.
Compliance Information
RoHS compliant per ST product page. AEC-Q100 qualified for automotive applications. Halogen-free status not explicitly stated in available data.
