STM8AF6266TCY - 8-bit Automotive MCU, 32KB Flash, LQFP-48 | STMicroelectronics
MPN: STM8AF6266TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.93 | $29.30 |
| 100 | $2.61 | $261.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.09 | $2,090.00 |
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:
STM8AF6266TDY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6268TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TCY
β Drop-Inβ 99,999 In Stock
$1.38 / Unit
View Datasheet βSTM8AF6266TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6266UCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6266TCY Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Maximum CPU Frequency | 16 MHz |
| Flash Memory | 32 KB |
| RAM | 2 KB |
| EEPROM | 1 KB |
| Supply Voltage | 2.95 V to 5.5 V |
| Operating Temperature | -40C to +150C |
| Package | LQFP-48 |
| Number of I/O Pins | 37 |
| ADC Resolution | 10-bit |
| ADC Channels | 10 |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | UART, SPI, I2C, CAN 2.0B |
| CAN Controller | Yes (2.0A/2.0B) |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
STM8AF6266TCY Pin Configuration
| Pin 1 | PE2 β General purpose I/O or alternate function |
| Pin 2 | PE3 β General purpose I/O or alternate function |
| Pin 3 | PE4 β General purpose I/O or alternate function |
| Pin 4 | PE5 β General purpose I/O or alternate function |
| Pin 5 | VSS β Ground |
| Pin 6 | VDD β Power supply |
| Pin 7 | OSCIN β External clock input |
| Pin 8 | OSCOUT β External clock output |
| Pin 9 | NRST β Reset (active low) |
| Pin 10 | PA0 β General purpose I/O or ADC input |
| Pin 11 | PA1 β General purpose I/O or ADC input |
| Pin 12 | PA2 β General purpose I/O or ADC input |
| Pin 13 | PA3 β General purpose I/O or ADC input |
| Pin 14 | VSS β Ground |
| Pin 15 | VDD β Power supply |
| Pin 16 | PB0 β General purpose I/O or SPI MOSI |
| Pin 17 | PB1 β General purpose I/O or SPI MISO |
| Pin 18 | PB2 β General purpose I/O or SPI SCK |
| Pin 19 | PB3 β General purpose I/O or SPI NSS |
| Pin 20 | PB4 β General purpose I/O or I2C SCL |
| Pin 21 | PB5 β General purpose I/O or I2C SDA |
| Pin 22 | PB6 β General purpose I/O or UART TX |
| Pin 23 | PB7 β General purpose I/O or UART RX |
| Pin 24 | VSS β Ground |
| Pin 25 | VDD β Power supply |
| Pin 26 | PC0 β General purpose I/O or ADC input |
| Pin 27 | PC1 β General purpose I/O or ADC input |
| Pin 28 | PC2 β General purpose I/O or ADC input |
| Pin 29 | PC3 β General purpose I/O or ADC input |
| Pin 30 | PC4 β General purpose I/O or ADC input |
| Pin 31 | PC5 β General purpose I/O or ADC input |
| Pin 32 | PC6 β General purpose I/O or CAN TX |
| Pin 33 | PC7 β General purpose I/O or CAN RX |
| Pin 34 | VSS β Ground |
| Pin 35 | VDD β Power supply |
| Pin 36 | PD0 β General purpose I/O or timer input |
| Pin 37 | PD1 β General purpose I/O or timer input |
| Pin 38 | PD2 β General purpose I/O or timer input |
| Pin 39 | PD3 β General purpose I/O or timer input |
| Pin 40 | PD4 β General purpose I/O or timer input |
| Pin 41 | PD5 β General purpose I/O or timer input |
| Pin 42 | PD6 β General purpose I/O or timer input |
| Pin 43 | PD7 β General purpose I/O or timer input |
| Pin 44 | VSS β Ground |
| Pin 45 | VDD β Power supply |
| Pin 46 | PE0 β General purpose I/O or alternate function |
| Pin 47 | PE1 β General purpose I/O or alternate function |
| Pin 48 | VCAP β Internal regulator capacitor (470 nF to ground) |
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, Motor Control, Sensor Interface, HVAC Control, Lighting Control, Industrial Automation.
Automotive Body Control Module
The STM8AF6266TCY is ideal for body control modules (BCM) due to its CAN interface, 32 KB Flash, and AEC-Q100 qualification. In a BCM, the MCU manages lighting, window lifts, door locks, and mirror controls. The CAN 2.0B controller allows communication with the vehicle's main network, while the 10-bit ADC reads analog sensors for temperature and position feedback. The device's low-power modes help reduce quiescent current when the vehicle is off. With a supply voltage range of 2.95V to 5.5V, it can operate directly from a car battery with proper regulation. The extended temperature range of -40Β°C to +150Β°C ensures reliable operation in extreme climates. The 37 I/O pins provide ample connectivity for switches, LEDs, and relay drivers. The embedded EEPROM stores fault codes and calibration data, surviving power cycles. The STM8A core's 16 MHz performance is sufficient for real-time control loops, and the two 16-bit timers generate PWM signals for dimming or motor speed control. Overall, the STM8AF6266TCY offers a cost-effective, reliable solution for BCM applications.
Recommended
Motor Control
The STM8AF6266TCY is well-suited for motor control applications such as window lift motors, wiper motors, and HVAC blowers. Its two 16-bit timers can generate complementary PWM signals with dead-time insertion for driving H-bridges or three-phase inverters. The 10-bit ADC with up to 10 channels samples motor currents and rotor position sensors. The CAN interface enables coordination with other ECUs in the vehicle. The device's 16 MHz clock provides enough processing power for sensorless or sensor-based control algorithms. The EEPROM stores motor parameters and calibration data. The wide supply voltage range accommodates varying battery voltages during cranking. The AEC-Q100 qualification ensures robustness against vibration and temperature extremes. In a typical motor control circuit, the MCU outputs PWM signals to a gate driver IC, which then drives the power MOSFETs. The ADC monitors the current through a shunt resistor, and the control loop adjusts the PWM duty cycle to maintain the desired speed or torque. The STM8AF6266TCY's low-power modes can be used to reduce consumption when the motor is idle. Overall, this MCU provides a balanced combination of performance, peripherals, and automotive-grade reliability for motor control.
Recommended
Sensor Interface
The STM8AF6266TCY is an excellent choice for sensor interface applications in automotive and industrial systems. It features a 10-bit ADC with 10 channels, which can read analog sensors such as temperature, pressure, and position. The UART, SPI, and I2C interfaces allow connection to digital sensors like accelerometers, gyroscopes, and environmental sensors. The CAN interface enables the MCU to transmit sensor data to a central control unit. The device's low-power modes are beneficial for battery-powered sensor nodes. The EEPROM can store sensor calibration coefficients and configuration data. The wide operating temperature range and AEC-Q100 qualification make it suitable for under-hood sensors. In a typical sensor interface application, the MCU periodically wakes from Halt mode, reads the sensor via ADC or digital interface, processes the data, and sends it over CAN or UART. The 16 MHz clock ensures fast response times. The 37 I/O pins provide flexibility for multiple sensors and control signals. The STM8AF6266TCY's robust design and automotive-grade reliability make it a dependable choice for sensor fusion and data acquisition.
Recommended
HVAC Control
The STM8AF6266TCY is well-suited for HVAC (Heating, Ventilation, and Air Conditioning) control modules in vehicles. It manages the blower motor, temperature sensors, and actuator positions. The 10-bit ADC reads temperature sensors and potentiometers for user settings. The two 16-bit timers generate PWM signals for blower motor speed control. The CAN interface allows the HVAC module to communicate with the engine control unit and climate control panel. The device's low-power modes help reduce battery drain when the vehicle is off. The EEPROM stores user preferences and diagnostic data. The wide supply voltage range (2.95V to 5.5V) ensures operation during engine start. The AEC-Q100 qualification guarantees reliability in the passenger compartment environment. In a typical HVAC application, the MCU reads the cabin temperature sensor, compares it to the setpoint, and adjusts the blower speed and air mix door position. The STM8AF6266TCY's 16 MHz performance is sufficient for the control loop, and the 37 I/O pins interface with switches, LEDs, and actuators. Overall, this MCU provides a cost-effective and reliable solution for automotive HVAC control.
Recommended
Lighting Control
The STM8AF6266TCY is ideal for automotive lighting control, including headlamps, tail lamps, and interior lighting. Its two 16-bit timers can generate PWM signals for dimming LEDs. The 10-bit ADC monitors ambient light sensors and current sense resistors. The CAN interface allows the lighting module to receive commands from the body control module. The device's low-power modes are useful for daytime running lights that operate with reduced brightness. The EEPROM stores lighting profiles and calibration data. The wide supply voltage range accommodates battery voltage variations. The AEC-Q100 qualification ensures reliability in the harsh automotive environment. In a typical lighting application, the MCU receives a CAN message to turn on the headlamps, then generates a PWM signal to control the LED driver. The ADC monitors the LED current to ensure consistent brightness. The STM8AF6266TCY's 16 MHz clock provides precise timing for PWM generation. The 37 I/O pins can control multiple lighting channels. Overall, this MCU offers a flexible and reliable platform for automotive lighting systems.
Recommended
Industrial Automation
The STM8AF6266TCY can also be used in industrial automation applications such as PLCs, motor drives, and sensor nodes. Its robust design, wide temperature range, and CAN interface make it suitable for factory floor environments. The 10-bit ADC reads analog sensors, and the UART/SPI/I2C interfaces connect to industrial sensors and actuators. The two 16-bit timers generate PWM for motor control or signal generation. The EEPROM stores configuration data and calibration values. The device's low-power modes are beneficial for energy-efficient industrial sensors. The 16 MHz clock provides adequate processing power for control loops. The LQFP-48 package is easy to solder and fits in compact industrial PCBs. The AEC-Q100 qualification, while automotive-focused, also indicates high reliability that is beneficial in industrial settings. In a typical industrial application, the MCU reads a temperature sensor, processes the data, and sends it over CAN to a central controller. The STM8AF6266TCY's 37 I/O pins provide flexibility for various industrial interfaces. Overall, this MCU is a versatile choice for cost-sensitive industrial applications.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6266TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6266TDY | STM8AF6268TCY | STM8AF6226TCY |
|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 32 KB | 32 KB | 64 KB | 8 KB |
| RAM | 2 KB | 2 KB | 6 KB | 1 KB |
| EEPROM | 1 KB | 1 KB | 2 KB | 0.5 KB |
| CAN Interface | Yes | Yes | Yes | No |
| ADC Channels | 10 | 10 | 16 | 7 |
| Timers | 2x 16-bit, 1x 8-bit | 2x 16-bit, 1x 8-bit | 2x 16-bit, 1x 8-bit | 1x 16-bit, 1x 8-bit |
Key Differentiators
- Integrated CAN 2.0B controller (vs STM8AF6226TCY)
- 32 KB Flash memory (vs STM8AF6226TCY)
- AEC-Q100 qualified (vs STM8AF6226TCY)
Design Notes
The STM8AF6266TCY operates from 2.95V to 5.5V. Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close as possible to the pins. Additionally, a 4.7 uF bulk capacitor is recommended on the main supply. The VCAP pin requires a 470 nF capacitor to ground for internal regulator stability. Ensure the power supply can handle the peak current during Flash programming or CAN transmission.
For the LQFP-48 package, use a 0.5 mm pitch footprint. Provide a solid ground plane under the device to reduce noise and improve thermal performance. Keep the crystal oscillator (if used) close to the OSCIN/OSCOUT pins with short traces and a ground guard ring. For CAN, place the transceiver close to the MCU and use proper termination resistors (120 ohm) at both ends of the bus.
Do not exceed the absolute maximum ratings, especially the supply voltage (7V) and I/O pin voltages. Ensure the NRST pin is properly pulled up with a 100 nF capacitor to ground for reliable reset. When using the internal RC oscillator, be aware of its accuracy (Β±1% typical) and calibrate if needed. For CAN communication, ensure the bus is properly terminated and the transceiver is compatible with the MCU's CAN controller.
Compliance Information
AEC-Q100 qualified per STMicroelectronics product page. RoHS compliant. REACH compliance assumed based on ST's general compliance, but not explicitly stated in the provided data.
