STM8AF6266TCY - 8-bit Automotive MCU, 32KB Flash, LQFP-32 | STMicroelectronics
MPN: STM8AF6266TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.46 | $4.46 |
| 10 | $4.1 | $41.00 |
| 100 | $3.72 | $372.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for STM8AF6266TCY 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:
STM8AF6266TCX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6266TDX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6268TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6246TCY
β Drop-Inβ In Stock
$1.95 / Unit
View Datasheet βSTM8AF6248TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6266TCY Maximum Ratings & Electrical Characteristics
| Core | STM8A |
| Architecture | 8-bit CISC, Harvard |
| Max CPU Frequency | 16 MHz |
| Flash Program Memory | 32 KB (32K x 8) |
| RAM | 2 KB |
| EEPROM | 1 KB (true data EEPROM) |
| Supply Voltage | 2.95 V to 5.5 V |
| I/O Ports | 25 |
| ADC | 10-bit, up to 10 channels |
| Timers | Two 16-bit, one 8-bit |
| Communication Interfaces | UART, SPI, I2C, LIN, CAN 2.0B |
| Package | LQFP-32 (7x7 mm) |
| Operating Temperature | -40Β°C to +150Β°C |
| Qualification | AEC-Q100 |
| RoHS | Compliant |
STM8AF6266TCY Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | VCAP β Internal regulator capacitor |
| Pin 4 | NRST β Reset (active low) |
| Pin 5 | PA0 β General purpose I/O / ADC input |
| Pin 6 | PA1 β General purpose I/O / ADC input |
| Pin 7 | PA2 β General purpose I/O / ADC input |
| Pin 8 | PA3 β General purpose I/O / ADC input |
| Pin 9 | VSS β Digital ground |
| Pin 10 | VDD β Digital power supply |
| Pin 11 | PB0 β General purpose I/O / SPI |
| Pin 12 | PB1 β General purpose I/O / SPI |
| Pin 13 | PB2 β General purpose I/O / SPI |
| Pin 14 | PB3 β General purpose I/O / SPI |
| Pin 15 | PB4 β General purpose I/O / I2C |
| Pin 16 | PB5 β General purpose I/O / I2C |
| Pin 17 | PB6 β General purpose I/O / UART |
| Pin 18 | PB7 β General purpose I/O / UART |
| 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 | PD0 β General purpose I/O / CAN |
| Pin 26 | PD1 β General purpose I/O / CAN |
| Pin 27 | PD2 β General purpose I/O / LIN |
| Pin 28 | PD3 β General purpose I/O / LIN |
| Pin 29 | PD4 β General purpose I/O / timer |
| Pin 30 | PD5 β General purpose I/O / timer |
| Pin 31 | PD6 β General purpose I/O / timer |
| Pin 32 | PD7 β General purpose I/O / timer |
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
STM8AF6266TCY is suitable for 6 applications: Automotive Body Control Module (BCM), Window Lift and Mirror Control, HVAC Control, Sensor Interface, Motor Control, Lighting Control.
Automotive Body Control Module (BCM)
The STM8AF6266TCY is ideal for body control modules that manage lighting, door locks, and window lifts. Its 32KB Flash and 1KB EEPROM store configuration data and fault codes, while the CAN 2.0B interface enables communication with the vehicle's main network. The AEC-Q100 qualification and -40Β°C to +150Β°C range ensure reliable operation in harsh automotive environments. The 10-bit ADC reads analog sensors for ambient light and temperature, and the 16-bit timers generate PWM signals for motor control. With 25 I/O pins, it can interface with multiple switches and actuators. The low-power modes help reduce current draw when the vehicle is off, preserving battery life. The STM8A core's 16 MIPS performance handles real-time control loops efficiently, making it a cost-effective solution for BCM applications.
Recommended
Window Lift and Mirror Control
The STM8AF6266TCY provides precise motor control for window lifts and mirror adjustment. Its two 16-bit timers generate PWM signals to drive H-bridge circuits, while the 10-bit ADC monitors current sensing resistors for stall detection. The 1KB EEPROM stores mirror position presets and window limit positions, surviving power cycles. The LIN interface allows connection to the body control module for centralized commands. The device's 16 MHz clock and Harvard architecture ensure responsive control, and the extended temperature range supports door-mounted applications exposed to extreme weather. The 25 I/O pins accommodate position sensors, limit switches, and user switches. The low-power Halt mode reduces current consumption when idle, which is critical for battery preservation. The AEC-Q100 qualification guarantees long-term reliability in vibration-prone environments.
Recommended
HVAC Control
The STM8AF6266TCY manages HVAC systems by reading temperature sensors via its 10-bit ADC and controlling blower motors and actuator valves. The 32KB Flash stores control algorithms and calibration tables, while the 1KB EEPROM retains user settings. The CAN interface communicates with the engine control unit for temperature data and climate control commands. The device's 16 MHz performance handles PID control loops for precise temperature regulation. The extended temperature range and AEC-Q100 qualification ensure reliable operation in the passenger compartment and under-dash areas. The UART interface can connect to a diagnostic port for service and troubleshooting. The low-power modes help reduce battery drain when the vehicle is off. With 25 I/O pins, it can interface with multiple sensors, switches, and actuators, making it a versatile solution for HVAC control.
Recommended
Sensor Interface
The STM8AF6266TCY serves as a sensor hub, reading analog and digital sensors and transmitting data over CAN or LIN. Its 10-bit ADC with up to 10 channels interfaces with temperature, pressure, and position sensors. The SPI and I2C interfaces connect to digital sensors like accelerometers and gyroscopes. The 1KB EEPROM stores calibration coefficients and sensor IDs. The device's 16 MHz performance enables real-time sensor data processing and filtering. The CAN 2.0B interface allows the MCU to broadcast sensor data to the vehicle network, while the LIN interface supports lower-cost sub-networks. The extended temperature range and AEC-Q100 qualification make it suitable for engine bay and under-chassis sensor modules. The low-power modes reduce current consumption in always-on sensor monitoring applications. The 25 I/O pins provide ample connectivity for multiple sensors and status LEDs.
Recommended
Motor Control
The STM8AF6266TCY is well-suited for brush DC motor control in automotive applications like seat adjustment and cooling fans. Its two 16-bit timers generate complementary PWM signals for H-bridge or half-bridge drivers. The 10-bit ADC monitors motor current for overcurrent protection and stall detection. The 32KB Flash stores motor control algorithms, including soft-start and speed ramping. The CAN interface allows remote control and diagnostics from the vehicle network. The device's 16 MHz performance ensures fast control loop execution, and the Harvard architecture allows simultaneous data access for efficient PWM updates. The extended temperature range and AEC-Q100 qualification ensure reliable operation in high-temperature environments. The low-power modes help reduce current draw when the motor is idle. With 25 I/O pins, it can interface with Hall sensors, encoders, and limit switches.
Recommended
Lighting Control
The STM8AF6266TCY controls automotive lighting systems, including headlamps, taillights, and interior lighting. Its 16-bit timers generate PWM signals for dimming and intensity control. The 10-bit ADC reads ambient light sensors for automatic headlamp activation. The 1KB EEPROM stores lighting profiles and calibration data. The CAN interface allows communication with the body control module for centralized lighting management. The device's 16 MHz performance handles complex lighting sequences and diagnostics. The extended temperature range and AEC-Q100 qualification ensure reliable operation in exterior lighting applications exposed to extreme temperatures. The low-power modes reduce current draw when lights are off. With 25 I/O pins, it can control multiple LED channels and read switch inputs. The UART interface can be used for diagnostic communication.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6266TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6266TCX | STM8AF6266TDX | STM8AF6268TCY |
|---|---|---|---|---|
| Package | LQFP-32 | LQFP-32 - same | LQFP-32 - same | LQFP-32 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Max CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
| Operating Temperature | -40Β°C to +150Β°C | -40Β°C to +125Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C |
| CAN Interface | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) |
Key Differentiators
- Extended temperature range up to +150Β°C (vs STM8AF6266TCX)
- Integrated CAN 2.0B controller (vs STM8AF6246TCY)
- 32KB Flash with read-while-write (vs STM8AF6248TCY)
Design Notes
Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close to the pins as possible. Additionally, place a 4.7 uF bulk capacitor on the main power rail. The VCAP pin requires a 470 nF capacitor for internal regulator stability. Ensure the supply voltage stays within 2.95V to 5.5V to avoid brown-out conditions.
For the LQFP-32 package, ensure proper solder paste stencil design for the 0.8mm pitch leads. Use a solid ground plane under the device to minimize noise. Keep high-speed communication lines (CAN, SPI) short and shielded if possible. Follow STMicroelectronics layout guidelines in the datasheet for optimal EMC performance.
Do not leave the NRST pin floating; connect a 100 nF capacitor to ground and a 10 kOhm pull-up resistor to VDD. Ensure the VCAP capacitor is connected and not omitted, as it is critical for internal regulator operation. For CAN communication, always use a transceiver like the TJA1050; do not connect the MCU directly to the bus.
Compliance Information
AEC-Q100 qualified per datasheets.com. RoHS compliant per DigiKey. REACH and conflict minerals status not specified in provided data.
