STM8AL3L66TCY - 8-bit Ultra-Low-Power MCU 32KB Flash | STMicroelectronics
料号： STM8AL3L66TCY ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.11 | $1.11 |
| 10 | $1.05 | $10.50 |
| 100 | $0.98 | $98.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.85 | $850.00 |
STM8AL3L66TCY 概述
An 8-bit microcontroller (MCU) is a compact integrated circuit that executes 8-bit instructions, typically used for embedded control tasks. The STM8AL3L66TCY belongs to the STM8AL series, which is part of the broader STM8 family of 8-bit MCUs. These devices are positioned between low-end 8-bit controllers and higher-performance 32-bit ARM-based MCUs, offering a balance of cost, power efficiency, and sufficient processing capability for many automotive and industrial applications.
Key features of the STM8AL3L66TCY include multiple low-power modes (Wait, Active-Halt, and 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) with calendar. It also integrates a variety of communication interfaces including I2C, SPI, and UART, along with a 16-bit timer and a 12-bit timer for precise timing and PWM generation.
The STM8AL3L66TCY is built on a low-power process technology that enables extended battery life in portable devices. Its architecture includes a single-wire debug interface (SWIM) for programming and debugging, and it supports in-application programming (IAP) for firmware updates. The device is designed for reliable operation in harsh environments, with an operating temperature range of -40°C to +85°C.
Typical applications include smart meters, portable medical devices, sensor nodes, and industrial control systems. The ultra-low-power consumption and rich analog peripherals make it ideal for battery-operated applications where energy efficiency is critical.
When designing with this MCU, careful attention should be paid to power supply decoupling and the selection of low-power modes to maximize battery life. The RTC can be powered from a separate backup battery to maintain timekeeping during main power loss.
直接替换替代料： STM8AL3L66TCY ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM8AL3L66TCY （相同外形与封装尺寸） ——差异在于 Package, RAM Size.
快速对比工具——选择替代料号进行并排对比：
STM8AL3L68TCY
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM8AL3L46TCY
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.45 / 个
查看数据手册 →STM8AL3L48TCY
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM8AL3L66TCY 最大额定值与电气特性
| Core | STM8A 8-bit CISC |
| 最大时钟频率 | 16 MHz |
| Flash Memory Size | 32 KB (32K x 8) |
| RAM Size | 2 KB |
| Supply Voltage Range | 1.8V to 3.6V |
| 封装 | 32-LQFP (7x7) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40°C to +85°C |
| ADC Resolution | 12-bit |
| ADC Channels | 16 |
| Communication Interfaces | I2C, SPI, UART |
| Timers | 16-bit timer, 12-bit timer |
| Low-Power Modes | Wait, Active-Halt, Halt |
| Halt Mode Current | 0.6 µA (typical) |
| Debug Interface | SWIM |
| Automotive Grade | AEC-Q100 |
| RoHS 状态 | Compliant |
STM8AL3L66TCY 引脚配置
| 引脚 1 | VSS — Ground |
| 引脚 2 | VDD — Power supply |
| 引脚 3 | PA0 — General purpose I/O or ADC input |
| 引脚 4 | PA1 — General purpose I/O or ADC input |
| 引脚 5 | PA2 — General purpose I/O or ADC input |
| 引脚 6 | PA3 — General purpose I/O or ADC input |
| 引脚 7 | NRST — Reset (active low) |
| 引脚 8 | PA4 — General purpose I/O or ADC input |
| 引脚 9 | PA5 — General purpose I/O or ADC input |
| 引脚 10 | PA6 — General purpose I/O or ADC input |
| 引脚 11 | PA7 — General purpose I/O or ADC input |
| 引脚 12 | VSS — Ground |
| 引脚 13 | VDD — Power supply |
| 引脚 14 | PB0 — General purpose I/O or timer input |
| 引脚 15 | PB1 — General purpose I/O or timer input |
| 引脚 16 | PB2 — General purpose I/O or timer input |
| 引脚 17 | PB3 — General purpose I/O or timer input |
| 引脚 18 | PB4 — General purpose I/O or timer input |
| 引脚 19 | PB5 — General purpose I/O or timer input |
| 引脚 20 | PB6 — General purpose I/O or timer input |
| 引脚 21 | PB7 — General purpose I/O or timer input |
| 引脚 22 | VSS — Ground |
| 引脚 23 | VDD — Power supply |
| 引脚 24 | PC0 — General purpose I/O or ADC input |
| 引脚 25 | PC1 — General purpose I/O or ADC input |
| 引脚 26 | PC2 — General purpose I/O or ADC input |
| 引脚 27 | PC3 — General purpose I/O or ADC input |
| 引脚 28 | PC4 — General purpose I/O or ADC input |
| 引脚 29 | PC5 — General purpose I/O or ADC input |
| 引脚 30 | PC6 — General purpose I/O or ADC input |
| 引脚 31 | PC7 — General purpose I/O or ADC input |
| 引脚 32 | VDD — Power supply |
典型应用
STM8AL3L66TCY 适用于 6 应用s: Automotive Body Control Module, Smart Metering, Portable Medical Devices, Industrial Sensor Nodes, Smart Home Devices, Battery Management Systems.
Automotive Body Control Module
The STM8AL3L66TCY is ideal for automotive body control modules due to its AEC-Q100 qualification, wide operating temperature range, and low-power modes. It can manage lighting, window lifts, and door locks with its rich peripheral set including timers, ADC, and communication interfaces. The 16 MHz core provides sufficient processing power for real-time control tasks, while the 0.6 µA halt mode ensures minimal battery drain when the vehicle is off. Its 32 KB Flash is adequate for body control firmware, and the 12-bit ADC can monitor analog sensors for temperature and position feedback. The I2C, SPI, and UART interfaces enable communication with other ECUs and diagnostic tools. The device's robustness and automotive-grade reliability make it a trusted choice for safety-critical applications.
推荐
Smart Metering
The STM8AL3L66TCY is well-suited for smart metering applications such as electricity, water, and gas meters. Its ultra-low-power consumption extends battery life, which is critical for meters that operate for years without maintenance. The 12-bit ADC with 16 channels can accurately measure voltage and current from sensors, while the RTC provides precise timekeeping for billing and data logging. The communication interfaces (I2C, SPI, UART) allow connection to communication modules like PLC or RF transceivers for remote data transmission. The 32 KB Flash is sufficient for metering firmware, and the device's wide supply voltage range (1.8V to 3.6V) accommodates battery voltage variations. The halt mode current of 0.6 µA ensures minimal power draw during idle periods, maximizing battery life.
推荐
Portable Medical Devices
The STM8AL3L66TCY is ideal for portable medical devices like glucose meters, pulse oximeters, and blood pressure monitors. Its low-power operation is essential for battery-powered devices that need to last between charges. The 12-bit ADC can interface with various sensors to measure physiological signals, and the UART/I2C interfaces allow connection to displays and wireless modules for data transmission. The device's small 32-pin LQFP package is suitable for compact designs, and its wide operating temperature range ensures reliable operation in various environments. The 32 KB Flash is sufficient for medical device firmware, and the low-power modes help extend battery life during continuous monitoring. The device's reliability and long-term availability make it a trusted choice for medical applications.
推荐
Industrial Sensor Nodes
The STM8AL3L66TCY is well-suited for industrial sensor nodes used in condition monitoring, process control, and environmental sensing. Its low-power consumption allows deployment in remote locations with battery or energy harvesting power sources. The 12-bit ADC with 16 channels can interface with various analog sensors, while the I2C, SPI, and UART interfaces enable connection to digital sensors and communication modules. The device's robust design and wide temperature range (-40°C to +85°C) ensure reliable operation in harsh industrial environments. The 32 KB Flash is sufficient for sensor node firmware, and the low-power modes help extend battery life in remote deployments. The device's automotive-grade quality also ensures high reliability in industrial settings.
推荐
Smart Home Devices
The STM8AL3L66TCY is a great fit for smart home devices like thermostats, smart locks, and lighting controls. Its low-power consumption is crucial for battery-powered devices, and its rich peripheral set allows integration with sensors, actuators, and communication modules. The 12-bit ADC can read temperature and light sensors, while the UART/I2C interfaces enable connection to Wi-Fi or Zigbee modules for smart home integration. The device's small package and wide supply voltage range make it easy to integrate into compact designs. The 32 KB Flash is sufficient for smart home firmware, and the low-power modes help extend battery life in devices that are mostly in standby. The device's reliability and long-term availability make it a trusted choice for consumer applications.
推荐
Battery Management Systems
The STM8AL3L66TCY can be used in battery management systems (BMS) for monitoring and protecting lithium-ion batteries. Its 12-bit ADC can measure cell voltages and temperatures, while the communication interfaces allow connection to battery protection ICs and host controllers. The device's low-power consumption is beneficial for BMS in portable devices, where it can monitor battery status without draining the battery. The 32 KB Flash is sufficient for BMS firmware, and the wide supply voltage range (1.8V to 3.6V) is compatible with battery voltages. The device's automotive-grade quality ensures reliable operation in demanding applications. The low-power modes help extend battery life in standby, and the RTC can track battery age and usage history.
推荐
推荐产品汇总
工程参考数据： STM8AL3L66TCY ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STM8AL3L68TCY | STM8AL3L46TCY | STM8AL3L48TCY |
|---|---|---|---|---|
| Package | 32-LQFP (7x7) | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 32 KB | 64 KB | 16 KB | 16 KB |
| RAM Size | 2 KB | 4 KB | 2 KB | 2 KB |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Supply Voltage Range | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
关键差异点
- Ultra-low-power consumption with 0.6 µA halt mode current （对比 STM8AL3L68TCY)
- AEC-Q100 automotive qualification （对比 STM8AL3L46TCY)
- 32 KB Flash memory in a 32-pin LQFP package （对比 STM8AL3L48TCY)
设计说明
The STM8AL3L66TCY operates from 1.8V to 3.6V. Use a low-dropout regulator (LDO) to provide a stable supply voltage, and place a 100nF decoupling capacitor close to each VDD pin and a 4.7µF bulk capacitor on the main supply. For battery-powered designs, utilize the low-power modes (Wait, Active-Halt, Halt) to minimize current consumption. In Halt mode, the typical current is 0.6 µA, which is ideal for extending battery life.
For the 32-pin LQFP package, ensure proper PCB layout with a solid ground plane and short traces for high-frequency signals. Place the decoupling capacitors as close as possible to the VDD and VSS pins. The exposed pad (if present) should be connected to ground for thermal and electrical performance. Follow the layout guidelines in the STM8AL3L66 datasheet for optimal EMC performance.
Avoid exceeding the absolute maximum ratings for supply voltage and I/O pins. Ensure the reset pin (NRST) is properly pulled up with a 100nF capacitor to ground to prevent spurious resets. When using the ADC, ensure the reference voltage is stable and bypassed with a capacitor. Also, be aware that the Flash memory has a limited number of write cycles; use wear-leveling if frequent writes are required.
合规信息
AEC-Q100 qualified per ST product page. RoHS compliant per distributor listings. Other compliance details not specified in the provided data.
