STM8AL3L46TCY - 8-Bit 16MHz Automotive MCU, 16KB Flash | STMicroelectronics
MPN: STM8AL3L46TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.28 | $2.28 |
| 10 | $2.05 | $20.50 |
| 100 | $1.82 | $182.00 |
| 500 | $1.64 | $820.00 |
| 1,000 | $1.45 | $1,450.00 |
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:
STM8AL3L46TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3L48TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3L46TCY
β Drop-Inβ In Stock
$1.45 / Unit
View Datasheet βSTM8AL3L46TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3L48TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3L46TCY Maximum Ratings & Electrical Characteristics
| Core Processor | STM8A |
| Core Size | 8-Bit |
| Speed | 16MHz |
| Program Memory Size | 16KB (16K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 2KB |
| EEPROM Size | 1KB |
| Number of I/O | 26 |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Number of A/D Converters | 1 |
| A/D Converter Resolution | 12-bit |
| Number of A/D Channels | 16 |
| Oscillator Type | Internal |
| Operating Voltage | 1.8V to 3.6V |
| Operating Temperature | -40Β°C to +125Β°C |
| Package | 32-LQFP (7x7mm) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| 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 / ADC input |
| Pin 4 | PA1 β General purpose I/O / ADC input |
| Pin 5 | PA2 β General purpose I/O / ADC input |
| Pin 6 | PA3 β General purpose I/O / ADC input |
| Pin 7 | PA4 β General purpose I/O / ADC input |
| Pin 8 | PA5 β General purpose I/O / ADC input |
| Pin 9 | PA6 β General purpose I/O / ADC input |
| Pin 10 | PA7 β General purpose I/O / ADC input |
| Pin 11 | PB0 β General purpose I/O / SPI MOSI |
| Pin 12 | PB1 β General purpose I/O / SPI MISO |
| Pin 13 | PB2 β General purpose I/O / SPI SCK |
| Pin 14 | PB3 β General purpose I/O / SPI NSS |
| Pin 15 | PB4 β General purpose I/O / I2C SCL |
| Pin 16 | PB5 β General purpose I/O / I2C SDA |
| Pin 17 | PB6 β General purpose I/O / UART TX |
| Pin 18 | PB7 β General purpose I/O / UART RX |
| Pin 19 | PC0 β General purpose I/O / ADC input |
| Pin 20 | PC1 β General purpose I/O / ADC input |
| Pin 21 | PC2 β General purpose I/O / ADC input |
| Pin 22 | PC3 β General purpose I/O / ADC input |
| Pin 23 | PC4 β General purpose I/O / ADC input |
| Pin 24 | PC5 β General purpose I/O / ADC input |
| Pin 25 | PC6 β General purpose I/O / ADC input |
| Pin 26 | PC7 β General purpose I/O / ADC input |
| Pin 27 | PD0 β General purpose I/O / LCD segment |
| Pin 28 | PD1 β General purpose I/O / LCD segment |
| Pin 29 | PD2 β General purpose I/O / LCD segment |
| Pin 30 | PD3 β General purpose I/O / LCD segment |
| Pin 31 | NRST β Reset (active low) |
| Pin 32 | SWIM β Single wire interface module for debug |
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: Automotive Body Control Module, Battery Management System, Smart Sensor Interface, Dashboard Display, Tire Pressure Monitoring System, Industrial Control.
Automotive Body Control Module
The STM8AL3L46TCY is ideal for automotive body control modules (BCMs) that manage lighting, windows, and door locks. Its AEC-Q100 qualification ensures reliable operation in harsh automotive environments, while the integrated LCD driver can directly interface with dashboard displays. The 12-bit ADC and multiple communication interfaces (I2C, SPI, UART) enable seamless integration with sensors and actuators. The ultra-low-power modes extend battery life in standby conditions, critical for always-on automotive systems. The 16MHz core provides sufficient processing power for real-time control loops, and the 16KB Flash is adequate for BCM firmware. The wide operating voltage range (1.8V to 3.6V) accommodates automotive battery voltage variations. The 32-pin LQFP package fits compact PCB layouts, and the SWIM debug interface simplifies firmware development and field updates.
Recommended
Battery Management System
The STM8AL3L46TCY is well-suited for battery management systems (BMS) in electric vehicles and hybrid vehicles. Its 12-bit ADC with 16 channels can monitor individual cell voltages and temperatures, while the low-power modes ensure minimal battery drain during idle periods. The integrated EEPROM stores calibration data and battery parameters, and the I2C interface connects to external battery monitoring ICs. The AEC-Q100 qualification guarantees reliable operation in the demanding automotive environment. The 16MHz core handles real-time battery state-of-charge calculations, and the 16KB Flash is sufficient for BMS algorithms. The wide operating voltage range (1.8V to 3.6V) allows direct connection to the battery pack, and the compact 32-pin LQFP package fits space-constrained BMS PCBs. The watchdog timer enhances system reliability by resetting the MCU in case of firmware hangs.
Recommended
Smart Sensor Interface
The STM8AL3L46TCY is an excellent choice for smart sensor interfaces in automotive and industrial applications. Its 12-bit ADC with 16 channels can directly interface with analog sensors, while the I2C and SPI interfaces connect to digital sensors. The ultra-low-power modes enable battery-powered wireless sensor nodes, and the integrated LCD driver can display sensor readings locally. The AEC-Q100 qualification makes it suitable for automotive sensor modules, and the wide operating temperature range (-40Β°C to +125Β°C) ensures reliable operation in extreme environments. The 16MHz core processes sensor data in real-time, and the 16KB Flash is sufficient for sensor fusion algorithms. The compact 32-pin LQFP package fits small sensor modules, and the SWIM debug interface simplifies firmware development. The brown-out reset circuit ensures reliable startup and operation.
Recommended
Dashboard Display
The STM8AL3L46TCY is ideal for dashboard displays in automotive vehicles. Its integrated LCD driver supports up to 4x28 segments, enabling direct connection to a segmented LCD without external driver ICs. The 16MHz core handles display refresh and user input processing, while the UART interface communicates with the main ECU. The AEC-Q100 qualification ensures reliable operation in the automotive environment, and the wide operating temperature range (-40Β°C to +125Β°C) accommodates extreme cabin temperatures. The ultra-low-power modes extend battery life when the vehicle is off, and the 16KB Flash is sufficient for display firmware. The compact 32-pin LQFP package fits behind the dashboard, and the SWIM debug interface simplifies firmware updates. The brown-out reset circuit ensures reliable startup when the ignition is turned on.
Recommended
Tire Pressure Monitoring System
The STM8AL3L46TCY is well-suited for tire pressure monitoring systems (TPMS) in automotive vehicles. Its ultra-low-power modes enable battery-powered operation for years, and the 12-bit ADC can interface with pressure sensors. The integrated EEPROM stores calibration data and sensor IDs, and the UART interface communicates with the vehicle's central TPMS receiver. The AEC-Q100 qualification ensures reliable operation in the harsh tire environment, and the wide operating temperature range (-40Β°C to +125Β°C) accommodates extreme temperatures. The 16MHz core processes pressure data in real-time, and the 16KB Flash is sufficient for TPMS firmware. The compact 32-pin LQFP package fits inside the tire pressure sensor module, and the SWIM debug interface simplifies firmware development. The watchdog timer enhances system reliability.
Recommended
Industrial Control
The STM8AL3L46TCY is suitable for industrial control applications such as motor control, process control, and automation. Its 12-bit ADC with 16 channels can interface with various sensors, and the PWM outputs can drive motors and actuators. The I2C, SPI, and UART interfaces enable communication with other industrial devices. The wide operating voltage range (1.8V to 3.6V) accommodates various power supplies, and the extended temperature range (-40Β°C to +125Β°C) ensures reliable operation in industrial environments. The 16MHz core handles real-time control loops, and the 16KB Flash is sufficient for control algorithms. The compact 32-pin LQFP package fits industrial PCBs, and the SWIM debug interface simplifies firmware development. The brown-out reset circuit ensures reliable startup and operation.
Recommended
Recommended Products Summary
Engineering reference data for STM8AL3L46TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AL3L46TAY | STM8AL3L48TCY |
|---|---|---|---|
| Package | 32-LQFP (7x7mm) | 32-LQFP (7x7mm) | 32-LQFP (7x7mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | STM8A | STM8A | STM8A |
| Speed | 16MHz | 16MHz | 16MHz |
| Flash Memory | 16KB | 16KB | 32KB |
| RAM | 2KB | 2KB | 2KB |
| EEPROM | 1KB | 1KB | 1KB |
| ADC Resolution | 12-bit | 12-bit | 12-bit |
| LCD Driver | Yes (4x28) | Yes (4x28) | Yes (4x28) |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Integrated LCD driver supporting up to 4x28 segments (vs STM8AL3L46TAY)
- AEC-Q100 automotive qualification (vs STM8AL3L46TAY)
- Ultra-low-power modes for battery-powered applications (vs STM8AL3L46TAY)
Design Notes
The STM8AL3L46TCY operates from 1.8V to 3.6V. Use a 100nF ceramic capacitor close to each VDD pin and a 4.7uF bulk capacitor for decoupling. For battery-powered applications, consider using the low-power modes (Halt, Active-Halt, Wait) to extend battery life. Ensure the power supply can handle the peak current during Flash programming or LCD switching.
For the 32-pin LQFP package, ensure proper PCB layout with a solid ground plane. Place decoupling capacitors as close to the VDD pins as possible. For the SWIM debug interface, keep the trace short and add a series resistor (e.g., 1kΞ©) to protect against ESD. For the LCD driver, route the segment and common lines away from high-speed digital signals to minimize noise.
When using the integrated LCD driver, ensure the contrast control register is configured correctly and external bias resistors are placed as specified in the datasheet. Do not exceed the absolute maximum ratings for VDD (4.0V) or the I/O pins. For the ADC, use a stable reference voltage and consider adding a filter capacitor on the VREF pin. The brown-out reset circuit should be enabled to ensure reliable startup.
Compliance Information
AEC-Q100 qualified per STMicroelectronics product page. RoHS compliant per distributor listings.
