STM8AL3166TAY - 8-bit Ultra-Low-Power MCU, 32KB Flash | STMicroelectronics
MPN： STM8AL3166TAY ✓ 啟用中STM8AL3166TAY 概覽
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit central processing unit (CPU), memory, and programmable input/output peripherals. It is a subset of the broader microcontroller family, which falls under embedded systems and integrated circuits. The STM8A core is an enhanced 8-bit architecture that provides efficient code density and low power operation, making it suitable for battery-powered and energy-harvesting applications.
Key features of the STM8AL3166TAY include multiple low-power modes (Wait, Active-Halt, Halt) with typical current consumption as low as 0.6 µA in Halt mode, a 12-bit ADC with up to 16 channels, two comparators, and a real-time clock (RTC). It also integrates a variety of communication interfaces including SPI, I2C, and UART, along with a 16-bit timer and a 12-bit timer for precise timing control.
The STM8AL3166TAY is built on a low-power process technology that enables a wide operating voltage range of 1.8V to 3.6V, with an extended temperature range of -40°C to +125°C for automotive-grade reliability. The device includes a brown-out reset (BOR) and a programmable voltage detector (PVD) for robust power management. Its EEPROM with write protection and read-out protection enhances data security in critical applications.
Typical applications include automotive body control modules, battery management systems, industrial sensors, and portable medical devices. The ultra-low-power modes and rich analog peripherals make it ideal for applications that require long battery life and precise analog signal processing.
When designing with this MCU, careful attention should be paid to decoupling the power supply with a 100nF capacitor close to each VDD pin and a 4.7µF bulk capacitor. The RTC requires a 32.768 kHz crystal for accurate timekeeping, and the ADC reference voltage should be filtered to minimize noise. Proper layout of the crystal and analog ground planes is essential for reliable operation.
直接替換替代品，適用於 STM8AL3166TAY — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM8AL3166TAY （相同外形與佔位） — 差異在於 Operating Temperature, ADC, Communication Interfaces, Package.
STM8AL3168TAY
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8AL3166TAX
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8AL3166TAY 最大額定值與電氣特性
| Core Processor | STM8A |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Connectivity | I²C, 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 |
| 封裝 / 外殼 | 32-LQFP (7x7) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40°C to +125°C |
| Voltage - Supply (Vcc/Vdd) | 1.8V to 3.6V |
| Oscillator Type | Internal |
| Data Converters | A/D 16x12b |
| RoHS 狀態 | Compliant |
STM8AL3166TAY 腳位配置
| 腳位 1 | VDD — Digital power supply |
| 腳位 2 | VSS — Digital ground |
| 腳位 3 | PB0 — General purpose I/O, ADC input |
| 腳位 4 | PB1 — General purpose I/O, ADC input |
| 腳位 5 | PB2 — General purpose I/O, ADC input |
| 腳位 6 | PB3 — General purpose I/O, SPI MOSI |
| 腳位 7 | PB4 — General purpose I/O, SPI MISO |
| 腳位 8 | PB5 — General purpose I/O, SPI SCK |
| 腳位 9 | PB6 — General purpose I/O, I2C SCL |
| 腳位 10 | PB7 — General purpose I/O, I2C SDA |
| 腳位 11 | PC0 — General purpose I/O, ADC input |
| 腳位 12 | PC1 — General purpose I/O, ADC input |
| 腳位 13 | PC2 — General purpose I/O, ADC input |
| 腳位 14 | PC3 — General purpose I/O, ADC input |
| 腳位 15 | PC4 — General purpose I/O, ADC input |
| 腳位 16 | PC5 — General purpose I/O, ADC input |
| 腳位 17 | PD0 — General purpose I/O, UART TX |
| 腳位 18 | PD1 — General purpose I/O, UART RX |
| 腳位 19 | PD2 — General purpose I/O |
| 腳位 20 | PD3 — General purpose I/O |
| 腳位 21 | PD4 — General purpose I/O |
| 腳位 22 | PD5 — General purpose I/O |
| 腳位 23 | PD6 — General purpose I/O |
| 腳位 24 | PD7 — General purpose I/O |
| 腳位 25 | PE0 — General purpose I/O, ADC input |
| 腳位 26 | PE1 — General purpose I/O, ADC input |
| 腳位 27 | PE2 — General purpose I/O, ADC input |
| 腳位 28 | PE3 — General purpose I/O, ADC input |
| 腳位 29 | NRST — Reset (active low) |
| 腳位 30 | VDD — Digital power supply |
| 腳位 31 | VSS — Digital ground |
| 腳位 32 | VDDA — Analog power supply |
典型應用
STM8AL3166TAY 適用於 6 應用s: 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 (-40°C to +125°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 µA) 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.
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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.
推薦
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.
推薦
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 µA) 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.
推薦
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.
推薦
Aerospace and Drone
In aerospace and drone applications, the STM8AL3166TAY provides reliable control and monitoring in harsh environments. Its wide temperature range (-40°C to +125°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.
推薦
推薦產品摘要
工程參考資料，適用於 STM8AL3166TAY — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C | -40°C to +85°C |
主要差異化特點
- Ultra-low-power Halt mode with 0.6 µA typical current (對比STM8L151C6T6)
- Automotive temperature range (-40°C to +125°C) (對比STM8AL3166TAX)
- LQFP-32 package with 30 I/O pins (對比STM8AL3166UCY)
設計說明
Decouple the power supply with a 100nF capacitor close to each VDD pin and a 4.7µF 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.
合規資訊
Automotive grade per STM8AL family. RoHS compliant per ST product page.
