STM8AL3166TAY - 8-bit Ultra-Low-Power MCU, 32KB Flash | STMicroelectronics
MPN: STM8AL3166TAY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.09 | $1.09 |
| 10 | $0.98 | $9.80 |
| 100 | $0.87 | $87.00 |
| 500 | $0.8 | $400.00 |
| 1,000 | $0.73 | $730.00 |
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)
STM8AL3166TAY Maximum Ratings & Electrical Characteristics
| Core Processor | STM8A |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Connectivity | IΒ²C, IrDA, LINbus, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Number of I/O | 30 |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 2 KB |
| EEPROM Size | 1 KB |
| Package / Case | 32-LQFP (7x7) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40Β°C to +125Β°C |
| Voltage - Supply (Vcc/Vdd) | 1.8V to 3.6V |
| Oscillator Type | Internal |
| Data Converters | A/D 16x12b |
| RoHS Status | Compliant |
STM8AL3166TAY Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | PB0 β General purpose I/O, ADC input |
| Pin 4 | PB1 β General purpose I/O, ADC input |
| Pin 5 | PB2 β General purpose I/O, ADC input |
| Pin 6 | PB3 β General purpose I/O, SPI MOSI |
| Pin 7 | PB4 β General purpose I/O, SPI MISO |
| Pin 8 | PB5 β General purpose I/O, SPI SCK |
| Pin 9 | PB6 β General purpose I/O, I2C SCL |
| Pin 10 | PB7 β General purpose I/O, I2C SDA |
| Pin 11 | PC0 β General purpose I/O, ADC input |
| Pin 12 | PC1 β General purpose I/O, ADC input |
| Pin 13 | PC2 β General purpose I/O, ADC input |
| Pin 14 | PC3 β General purpose I/O, ADC input |
| Pin 15 | PC4 β General purpose I/O, ADC input |
| Pin 16 | PC5 β General purpose I/O, ADC input |
| Pin 17 | PD0 β General purpose I/O, UART TX |
| Pin 18 | PD1 β General purpose I/O, UART RX |
| Pin 19 | PD2 β General purpose I/O |
| Pin 20 | PD3 β General purpose I/O |
| Pin 21 | PD4 β General purpose I/O |
| Pin 22 | PD5 β General purpose I/O |
| Pin 23 | PD6 β General purpose I/O |
| Pin 24 | PD7 β General purpose I/O |
| Pin 25 | PE0 β General purpose I/O, ADC input |
| Pin 26 | PE1 β General purpose I/O, ADC input |
| Pin 27 | PE2 β General purpose I/O, ADC input |
| Pin 28 | PE3 β General purpose I/O, ADC input |
| Pin 29 | NRST β Reset (active low) |
| Pin 30 | VDD β Digital power supply |
| Pin 31 | VSS β Digital ground |
| Pin 32 | VDDA β Analog 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, Aerospace and Drone.
Automotive Body Control Module
The STM8AL3166TAY is ideal for automotive body control modules (BCMs) due to its ultra-low-power operation, wide temperature range (-40Β°C to +125Β°C), and robust peripherals. It manages lighting, window lifts, and door locks with efficient power consumption. The 12-bit ADC and comparators enable precise sensor monitoring, while LINbus and UART interfaces support vehicle network communication. Its 32KB Flash and 1KB EEPROM provide ample storage for control algorithms and calibration data. The low-power Halt mode (0.6 Β΅A) ensures minimal battery drain when the vehicle is off, extending battery life. The BOR and PVD ensure reliable operation under voltage fluctuations common in automotive environments.
Recommended
Battery Management System
In battery management systems (BMS), the STM8AL3166TAY monitors cell voltages and temperatures using its 12-bit ADC with up to 16 channels. Its ultra-low-power modes are critical for minimizing self-discharge in battery packs. The device's EEPROM stores calibration and cell-balancing parameters, while the RTC provides time-stamping for charge/discharge cycles. The wide operating voltage (1.8V to 3.6V) allows direct operation from a single lithium cell. The BOR and PVD protect against undervoltage conditions, ensuring safe operation. Communication via SPI or I2C enables data exchange with a host controller. The automotive temperature range ensures reliable performance in harsh environments.
Recommended
Industrial Sensor Node
The STM8AL3166TAY is well-suited for industrial sensor nodes that require low power and high reliability. Its 12-bit ADC and comparators interface with various analog sensors (temperature, pressure, humidity). The device's low-power modes enable battery-powered operation for years. The SPI and I2C interfaces connect to digital sensors and wireless modules. The 32KB Flash allows for complex signal processing algorithms, while the EEPROM stores calibration data. The wide temperature range and robust peripherals (BOR, PVD, WDT) ensure reliable operation in industrial environments. The 16 MHz clock provides sufficient processing power for real-time data acquisition and control.
Recommended
Portable Medical Device
For portable medical devices like glucose meters and pulse oximeters, the STM8AL3166TAY offers ultra-low-power operation and precise analog measurement. Its 12-bit ADC provides high-resolution readings from biosensors. The Halt mode (0.6 Β΅A) extends battery life between measurements. The device's small LQFP-32 package fits compact designs. The EEPROM stores patient data and device settings. The RTC enables time-stamping of measurements. The wide voltage range allows operation from a coin cell battery. The device's reliability and long-term availability make it suitable for medical applications requiring regulatory compliance.
Recommended
Smart Home Sensor
The STM8AL3166TAY is an excellent choice for smart home sensors such as motion detectors, thermostats, and smart locks. Its ultra-low-power modes enable battery-powered operation for years. The device's 12-bit ADC and comparators interface with various sensors (PIR, temperature, magnetic). The I2C and UART interfaces connect to Wi-Fi or Zigbee modules for home automation. The 32KB Flash allows for firmware updates over the air. The device's small package and low cost make it ideal for mass-produced consumer devices. The RTC provides accurate timekeeping for scheduling and logging.
Recommended
Aerospace and Drone
In aerospace and drone applications, the STM8AL3166TAY provides reliable control and monitoring in harsh environments. Its wide temperature range (-40Β°C to +125Β°C) and robust peripherals (BOR, PVD, WDT) ensure dependable operation. The 12-bit ADC interfaces with sensors for altitude, speed, and battery voltage. The device's low power consumption is critical for maximizing flight time. The SPI and UART interfaces connect to GPS modules, motor controllers, and telemetry systems. The 32KB Flash stores flight control algorithms, while the EEPROM retains calibration data. The small package saves weight and space in compact drone designs.
Recommended
Recommended Products Summary
Engineering reference data for STM8AL3166TAY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AL3166UCY | STM8AL3168TAY | STM8AL3166TAX | STM8L151C6T6 |
|---|---|---|---|---|---|
| Package | LQFP-32 (7x7) | UFQFPN-32 | LQFP-32 (7x7) | LQFP-32 (7x7) | LQFP-48 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | STM8A 8-bit | STM8A 8-bit | STM8A 8-bit | STM8A 8-bit | STM8L 8-bit |
| Max Speed | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Number of I/O | 30 | 30 | 30 | 30 | 38 |
| ADC | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels |
| Operating Temperature | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +85Β°C | -40Β°C to +85Β°C |
Key Differentiators
- Ultra-low-power Halt mode with 0.6 Β΅A typical current (vs STM8L151C6T6)
- Automotive temperature range (-40Β°C to +125Β°C) (vs STM8AL3166TAX)
- LQFP-32 package with 30 I/O pins (vs STM8AL3166UCY)
Design Notes
Decouple the power supply with a 100nF capacitor close to each VDD pin and a 4.7Β΅F bulk capacitor. The STM8AL3166TAY operates from 1.8V to 3.6V, so ensure the supply voltage stays within this range. Use a low-dropout regulator if powering from a battery to maintain stable voltage as the battery discharges.
For the RTC to function accurately, connect a 32.768 kHz crystal to the OSC pins with load capacitors as specified in the datasheet. Keep the crystal and its traces away from high-speed digital signals to avoid interference. Also, filter the ADC reference voltage with a capacitor to minimize noise and improve conversion accuracy.
Ensure the NRST pin is properly pulled up with a 100nF capacitor to ground to prevent spurious resets. Do not leave unused I/O pins floating; configure them as outputs or enable internal pull-ups. Also, be aware that the STM8AL3166TAY is a 3.3V device, so level shifting may be required when interfacing with 5V logic.
Compliance Information
Automotive grade per STM8AL family. RoHS compliant per ST product page.
