STM8AF6366 - Automotive 8-bit MCU, 32KB Flash, 16MHz | STMicroelectronics
MPN: STM8AF6366 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.95 | $29.50 |
| 100 | $2.45 | $245.00 |
| 500 | $2.15 | $1,075.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for STM8AF6366 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:
STM8AF6366TCX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6366TAX
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STM8AF6366TDX
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STM8AF6366TCY
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STM8AF6366TBX
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STM8AF6366TAY
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STM8AF6366TDY
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STM8AF6366TBY
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STM8AF6366TCZ
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STM8AF6366TAZ
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STM8AF6366TDZ
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STM8AF6366TBZ
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STM8AF6366TCV
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STM8AF6366TAV
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STM8AF6366TDV
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STM8AF6366TBV
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STM8AF6366TCW
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STM8AF6366TAW
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STM8AF6366TDW
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STM8AF6366TBW
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STM8AF6366 Maximum Ratings & Electrical Characteristics
| Core | STM8A (8-bit) |
| Max CPU Frequency | 16 MHz |
| Flash Memory | 32 KB (32K x 8) |
| Data EEPROM | Integrated true data EEPROM |
| RAM | [DATA_NEEDED: RAM size] |
| ADC Resolution | 10-bit |
| ADC Channels | Up to 16 multiplexed channels |
| Communication Interfaces | UART, SPI, I2C |
| Timers | 16-bit advanced control timer, general-purpose timers |
| Operating Voltage | 3.0V to 5.5V |
| Operating Temperature | -40Β°C to +150Β°C |
| Package | 32-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q10x qualified |
| Architecture | Harvard architecture with 3-stage pipeline |
| Performance | 10 MIPS at 16 MHz |
STM8AF6366 Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | PA0 β General purpose I/O or ADC input |
| Pin 4 | PA1 β General purpose I/O or ADC input |
| Pin 5 | PA2 β General purpose I/O or ADC input |
| Pin 6 | PA3 β General purpose I/O or ADC input |
| Pin 7 | NRST β Reset input, active low |
| Pin 8 | PA4 β General purpose I/O or ADC input |
| Pin 9 | PA5 β General purpose I/O or ADC input |
| Pin 10 | PA6 β General purpose I/O or ADC input |
| Pin 11 | PA7 β General purpose I/O or ADC input |
| Pin 12 | VDD β Digital power supply |
| Pin 13 | VSS β Digital ground |
| Pin 14 | PB0 β General purpose I/O or timer input |
| Pin 15 | PB1 β General purpose I/O or timer input |
| Pin 16 | PB2 β General purpose I/O or timer input |
| Pin 17 | PB3 β General purpose I/O or timer input |
| Pin 18 | PB4 β General purpose I/O or timer input |
| Pin 19 | PB5 β General purpose I/O or timer input |
| Pin 20 | PB6 β General purpose I/O or timer input |
| Pin 21 | PB7 β General purpose I/O or timer input |
| Pin 22 | VDD β Digital power supply |
| Pin 23 | VSS β Digital ground |
| Pin 24 | PC0 β General purpose I/O or ADC input |
| Pin 25 | PC1 β General purpose I/O or ADC input |
| Pin 26 | PC2 β General purpose I/O or ADC input |
| Pin 27 | PC3 β General purpose I/O or ADC input |
| Pin 28 | PC4 β General purpose I/O or ADC input |
| Pin 29 | PC5 β General purpose I/O or ADC input |
| Pin 30 | PC6 β General purpose I/O or ADC input |
| Pin 31 | PC7 β General purpose I/O or ADC input |
| Pin 32 | VDD β Digital 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
STM8AF6366 is suitable for 6 applications: Automotive Body Control Module, Automotive Lighting Control, Motor Control for Fans and Pumps, Sensor Interface, Industrial Control Systems, Aftermarket Automotive Electronics.
Automotive Body Control Module
The STM8AF6366 is ideal for automotive body control modules (BCMs) that manage lighting, wipers, power windows, and central locking. Its 32KB Flash and 10-bit ADC enable precise control of multiple actuators and sensors. The AEC-Q10x qualification ensures reliable operation in the harsh automotive environment, with an operating temperature range of -40Β°C to +150Β°C. The device's UART, SPI, and I2C interfaces allow communication with other ECUs and sensors, while its low-power modes help reduce battery drain when the vehicle is off. In a typical BCM, the STM8AF6366 reads switch inputs, controls relay drivers, and communicates over LIN or CAN via an external transceiver. Its 16MHz core provides sufficient processing power for real-time control loops, and the integrated EEPROM stores configuration data such as vehicle-specific settings. The 32-pin LQFP package is compact enough for the space-constrained BCM PCB, and the wide supply voltage range (3.0V to 5.5V) accommodates automotive battery voltage variations.
Recommended
Automotive Lighting Control
The STM8AF6366 is well-suited for automotive lighting control, including LED headlamps, daytime running lights, and interior lighting. Its 16-bit advanced control timer can generate PWM signals for dimming and color control, while the 10-bit ADC monitors current and temperature for protection. The device's automotive qualification and wide temperature range ensure reliable operation in the thermal extremes of lighting systems. In a typical LED lighting module, the STM8AF6366 reads ambient light sensors, adjusts PWM duty cycles to maintain constant brightness, and communicates with the BCM over LIN. The integrated EEPROM stores calibration data for LED binning, and the low-power modes help reduce quiescent current when the lights are off. The 32-pin LQFP package is suitable for compact lighting PCBs, and the 16MHz core provides enough performance for real-time control loops. The device's robust I/O structure can directly drive MOSFETs or LED drivers, reducing external component count.
Recommended
Motor Control for Fans and Pumps
The STM8AF6366 is used in motor control applications such as cooling fans, water pumps, and oil pumps in automotive systems. Its 16-bit advanced control timer provides high-resolution PWM for driving MOSFETs in a 3-phase inverter, and the 10-bit ADC samples motor currents for closed-loop control. The device's automotive qualification ensures reliability in the high-temperature environment near the engine. In a typical BLDC motor control application, the STM8AF6366 implements sensorless or sensor-based commutation, reads Hall sensor inputs, and adjusts PWM duty cycles to control motor speed. The integrated EEPROM stores motor parameters and calibration data, and the UART interface allows diagnostics and firmware updates. The 16MHz core provides sufficient processing power for the control algorithm, and the 32-pin LQFP package is suitable for the motor control PCB. The device's robust I/O structure can directly interface with gate drivers, and its low-power modes help reduce energy consumption when the motor is idle.
Recommended
Sensor Interface
The STM8AF6366 is used to interface with various sensors in automotive systems, such as temperature, pressure, and position sensors. Its 10-bit ADC with up to 16 channels can read multiple analog sensors, while the UART, SPI, and I2C interfaces connect to digital sensors. The device's automotive qualification and wide temperature range make it suitable for sensors located in harsh environments. In a typical sensor interface application, the STM8AF6366 reads analog sensor outputs, performs signal conditioning, and transmits the data over LIN or CAN to the ECU. The integrated EEPROM stores calibration coefficients, and the low-power modes help reduce current consumption when the sensor is in standby. The 16MHz core provides enough processing power for filtering and linearization algorithms, and the 32-pin LQFP package is compact for sensor modules. The device's robust I/O structure can directly interface with sensor bridges, and its ADC accuracy ensures precise measurements.
Recommended
Industrial Control Systems
The STM8AF6366 is also used in industrial control systems such as PLCs, motor drives, and automation equipment. Its robust feature set, including multiple timers, communication interfaces, and a 10-bit ADC, makes it suitable for a wide range of control applications. The device's automotive qualification ensures high reliability, which is also beneficial in industrial environments. In a typical industrial control application, the STM8AF6366 reads sensor inputs, controls actuators, and communicates with a central controller over Modbus or CAN. The integrated EEPROM stores configuration data, and the low-power modes help reduce energy consumption in battery-powered or energy-efficient systems. The 16MHz core provides sufficient processing power for real-time control loops, and the 32-pin LQFP package is suitable for industrial PCBs. The device's wide supply voltage range (3.0V to 5.5V) accommodates various industrial power rails, and its robust I/O structure can directly interface with relays and drivers.
Recommended
Aftermarket Automotive Electronics
The STM8AF6366 is popular in aftermarket automotive electronics such as alarm systems, remote starters, and telematics units. Its automotive qualification and wide temperature range ensure reliable operation in vehicles, and its low cost makes it attractive for high-volume aftermarket products. In a typical aftermarket alarm system, the STM8AF6366 monitors door switches, motion sensors, and remote key fob signals, and controls the siren and lights. The integrated EEPROM stores user settings, and the UART interface allows communication with a smartphone app via a Bluetooth module. The 16MHz core provides enough processing power for the alarm logic, and the 32-pin LQFP package is suitable for compact aftermarket modules. The device's low-power modes help reduce battery drain when the vehicle is parked, and its robust I/O structure can directly interface with relays and LEDs.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6366 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6366TCX | STM8AF6366TAX | STM8AF6366TDX |
|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | STM8A (8-bit) | STM8A (8-bit) | STM8A (8-bit) | STM8A (8-bit) |
| Max CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| Data EEPROM | Integrated true data EEPROM | Integrated true data EEPROM | Integrated true data EEPROM | Integrated true data EEPROM |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Operating Temperature | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C |
| Automotive Qualification | AEC-Q10x qualified | AEC-Q10x qualified | AEC-Q10x qualified | AEC-Q10x qualified |
Key Differentiators
- Automotive AEC-Q10x qualification (vs Generic 8-bit MCUs)
- Integrated true data EEPROM (vs MCUs without EEPROM)
- High performance at 16 MHz (vs Other 8-bit MCUs at lower frequencies)
Design Notes
Ensure proper decoupling of the VDD pins with a 100nF ceramic capacitor placed as close as possible to each VDD pin, and a 10uF bulk capacitor on the main supply. The STM8AF6366 operates from 3.0V to 5.5V, so verify that the supply voltage remains within this range during transients, especially in automotive environments where load dump and cold crank can cause voltage spikes. Consider using an external voltage supervisor or the built-in power-on reset to ensure reliable startup.
For the crystal oscillator, place the crystal and load capacitors as close to the OSC_IN and OSC_OUT pins as possible, with a ground plane underneath to minimize noise. Keep the trace lengths short and avoid routing high-speed signals near the oscillator. If using the internal RC oscillator, ensure that the VDD supply is clean to maintain frequency accuracy. The 32-pin LQFP package has a thermal pad; connect it to a solid ground plane to improve heat dissipation.
Do not exceed the absolute maximum ratings for VDD (typically 6.5V) or apply negative voltages to any pin. Ensure that the NRST pin is properly pulled up with a 100nF capacitor to ground to prevent spurious resets. When using the ADC, avoid floating input pins by configuring them as analog inputs or connecting them to a known voltage. Also, be aware that the integrated EEPROM has a limited write endurance; use wear-leveling techniques if frequent writes are expected.
Compliance Information
AEC-Q10x qualified per datasheet. RoHS and REACH compliance are standard for STMicroelectronics products, but specific certificates should be verified from the manufacturer.
