STM8AL3L46TCY - 8-bit Ultra-Low-Power MCU, 32KB Flash | STMicroelectronics
MPN: STM8AL3L46TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for STM8AL3L46TCY 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:
STM8AL3L48TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8L151C6T6
β Drop-Inπ Reference alternative (not in catalog)
STM8L152C6T6
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3L46TCY Maximum Ratings & Electrical Characteristics
| Core | STM8 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 |
| Low-Power Mode Current (Halt) | 0.35 Β΅A |
| Low-Power Run Mode Current | 5.4 Β΅A |
| ADC Resolution | 12-bit |
| ADC Channels | 25 |
| Communication Interfaces | SPI, I2C, USART |
| Timers | 2x 16-bit, 1x 8-bit |
| Package | LQFP-48 (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40Β°C to +85Β°C |
| RoHS Status | Compliant |
STM8AL3L46TCY Pin Configuration
| Pin 1 | VDD β Power supply |
| Pin 2 | VSS β Ground |
| Pin 3 | PA0 β General purpose I/O |
| Pin 4 | PA1 β General purpose I/O |
| Pin 5 | PA2 β General purpose I/O |
| Pin 6 | PA3 β General purpose I/O |
| Pin 7 | PA4 β General purpose I/O |
| Pin 8 | PA5 β General purpose I/O |
| Pin 9 | PA6 β General purpose I/O |
| Pin 10 | PA7 β General purpose I/O |
| Pin 11 | PB0 β General purpose I/O |
| Pin 12 | PB1 β General purpose I/O |
| Pin 13 | PB2 β General purpose I/O |
| Pin 14 | PB3 β General purpose I/O |
| Pin 15 | PB4 β General purpose I/O |
| Pin 16 | PB5 β General purpose I/O |
| Pin 17 | PB6 β General purpose I/O |
| Pin 18 | PB7 β General purpose I/O |
| Pin 19 | PC0 β General purpose I/O |
| Pin 20 | PC1 β General purpose I/O |
| Pin 21 | PC2 β General purpose I/O |
| Pin 22 | PC3 β General purpose I/O |
| Pin 23 | PC4 β General purpose I/O |
| Pin 24 | PC5 β General purpose I/O |
| Pin 25 | PC6 β General purpose I/O |
| Pin 26 | PC7 β General purpose I/O |
| Pin 27 | PD0 β General purpose I/O |
| Pin 28 | PD1 β General purpose I/O |
| Pin 29 | PD2 β General purpose I/O |
| Pin 30 | PD3 β General purpose I/O |
| Pin 31 | PD4 β General purpose I/O |
| Pin 32 | PD5 β General purpose I/O |
| Pin 33 | PD6 β General purpose I/O |
| Pin 34 | PD7 β General purpose I/O |
| Pin 35 | PE0 β General purpose I/O |
| Pin 36 | PE1 β General purpose I/O |
| Pin 37 | PE2 β General purpose I/O |
| Pin 38 | PE3 β General purpose I/O |
| Pin 39 | PE4 β General purpose I/O |
| Pin 40 | PE5 β General purpose I/O |
| Pin 41 | PE6 β General purpose I/O |
| Pin 42 | PE7 β General purpose I/O |
| Pin 43 | PF0 β General purpose I/O |
| Pin 44 | PF1 β General purpose I/O |
| Pin 45 | PF2 β General purpose I/O |
| Pin 46 | PF3 β General purpose I/O |
| Pin 47 | PF4 β General purpose I/O |
| Pin 48 | PF5 β General purpose I/O |
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
STM8AL3L46TCY is suitable for 6 applications: Smart Meters, Portable Medical Devices, Wireless Sensor Nodes, Industrial Monitoring, Energy Harvesting Systems, Wearable Devices.
Smart Meters
The STM8AL3L46TCY is ideal for smart meters due to its ultra-low power consumption and integrated ADC. In a typical smart meter, the MCU reads sensor data, processes it, and communicates via wireless modules. The 12-bit ADC with 25 channels allows direct connection to current and voltage sensors. The low-power modes enable the meter to run on battery for years, with Halt mode current of 0.35 Β΅A. The SPI and USART interfaces facilitate communication with RF modules for data transmission. The wide operating voltage range (1.8V-3.6V) ensures compatibility with battery packs. The MCU's robust timer peripherals support precise measurement of energy consumption. Overall, the STM8AL3L46TCY provides a cost-effective and energy-efficient solution for smart metering applications.
Recommended
Portable Medical Devices
The STM8AL3L46TCY is well-suited for portable medical devices like glucose meters and pulse oximeters. Its low power consumption extends battery life, critical for devices that must operate for months. The integrated 12-bit ADC and comparators enable accurate sensor readings. In a pulse oximeter, the MCU processes signals from optical sensors and calculates oxygen saturation. The I2C interface connects to display drivers and memory. The device's small LQFP-48 package allows compact PCB design. The low-power modes allow the device to sleep between measurements, drawing only 0.35 Β΅A in Halt mode. The wide operating voltage range supports coin cell batteries. The STM8AL3L46TCY's reliability and low cost make it a preferred choice for medical device manufacturers.
Recommended
Wireless Sensor Nodes
The STM8AL3L46TCY is perfect for wireless sensor nodes in IoT applications. Its ultra-low power consumption allows nodes to run on batteries for years. The MCU can wake up periodically, read sensors, and transmit data via wireless modules. The 12-bit ADC with 25 channels supports various analog sensors like temperature and humidity. The SPI interface connects to RF transceivers like LoRa or Zigbee. The low-power modes are essential for energy harvesting applications, where the MCU must operate on minimal power. The device's robust communication interfaces and timers enable efficient data collection and transmission. The STM8AL3L46TCY's small footprint and low cost make it ideal for large-scale sensor deployments.
Recommended
Industrial Monitoring
The STM8AL3L46TCY is used in industrial monitoring systems for its reliability and low power. It can monitor equipment parameters like temperature, pressure, and vibration. The 12-bit ADC with 25 channels allows direct connection to industrial sensors. The USART interface enables communication with industrial networks like Modbus. The device's wide operating temperature range (-40Β°C to +85Β°C) ensures operation in harsh environments. The low-power modes reduce energy consumption in remote monitoring stations. The MCU's timers and PWM outputs can control actuators. The STM8AL3L46TCY's robust design and long-term availability make it suitable for industrial applications.
Recommended
Energy Harvesting Systems
The STM8AL3L46TCY is designed for energy harvesting systems where power is scarce. Its ultra-low power consumption allows operation from solar cells or thermoelectric generators. The MCU can run in Low-Power Run mode at 5.4 Β΅A, making it possible to operate with harvested energy. The integrated ADC and comparators enable efficient power management. The device's low voltage operation (1.8V) is compatible with energy harvesting circuits. The low-power modes allow the MCU to sleep and wake up only when necessary. The STM8AL3L46TCY's small package and low cost make it ideal for self-powered IoT devices.
Recommended
Wearable Devices
The STM8AL3L46TCY is suitable for wearable devices like fitness trackers and smartwatches. Its low power consumption is essential for battery-powered wearables. The 12-bit ADC and comparators enable sensor integration for heart rate and motion detection. The I2C interface connects to accelerometers and gyroscopes. The device's small LQFP-48 package allows compact design. The low-power modes extend battery life, with Halt mode current of 0.35 Β΅A. The wide operating voltage range supports lithium-polymer batteries. The STM8AL3L46TCY's cost-effectiveness makes it a popular choice for consumer wearables.
Recommended
Recommended Products Summary
Engineering reference data for STM8AL3L46TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AL3L48TCY | STM8L151C6T6 | STM8L152C6T6 |
|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 32 KB | 64 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB |
| Halt Mode Current | 0.35 Β΅A | 0.35 Β΅A | 1 Β΅A | 1 Β΅A |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| LCD Driver | No | No | No | Yes |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
Key Differentiators
- Ultra-low Halt mode current of 0.35 Β΅A (vs STM8L151C6T6)
- Wide operating voltage range down to 1.8V (vs STM8L151C6T6)
- Optimized for energy harvesting (vs STM8L152C6T6)
Design Notes
To achieve the lowest power consumption, use the Halt mode with a wake-up timer. Configure the RTC to wake the MCU periodically. Ensure all unused I/O pins are set to analog input or low-power mode to avoid leakage. Use the internal RC oscillator for low-power operation, but switch to an external crystal for accurate timing.
Place decoupling capacitors (100 nF) close to each VDD pin and a bulk capacitor (10 Β΅F) near the power supply input. For the ADC, provide a clean analog ground and separate analog supply if possible. Keep high-frequency digital signals away from analog inputs to reduce noise.
Do not exceed the absolute maximum ratings, especially the supply voltage (3.6V). Ensure the reset pin is properly pulled up. When using the ADC, configure the sampling time appropriately to avoid inaccurate readings. Also, be aware that the Flash memory has a limited endurance (typically 10k cycles), so avoid excessive writes.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
