STM8AF6226TCY - 8-bit Automotive MCU, 8KB Flash, 16MHz | STMicroelectronics
MPN: STM8AF6226TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.15 | $2.15 |
| 10 | $1.93 | $19.30 |
| 100 | $1.72 | $172.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
Drop-in alternatives for STM8AF6226TCY 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:
STM8AF6226TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6223TCY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TCX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TDY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TCYTR
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TCY Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Maximum CPU Frequency | 16 MHz |
| Flash Memory | 8 KB |
| SRAM | 1 KB |
| EEPROM | 128 bytes |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Operating Temperature Range | -40Β°C to +150Β°C |
| Package | LQFP-32 (7x7 mm) |
| ADC Resolution | 10-bit |
| ADC Channels | 7 |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | UART, SPI, I2C |
| GPIO Pins | 28 |
| AEC-Q100 Qualification | Grade 0 |
| RoHS Compliance | Compliant |
STM8AF6226TCY Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | PA0 β General purpose I/O or ADC input |
| Pin 3 | PA1 β General purpose I/O or ADC input |
| Pin 4 | PA2 β General purpose I/O or ADC input |
| Pin 5 | PA3 β General purpose I/O or ADC input |
| Pin 6 | VSS β Digital ground |
| Pin 7 | PB0 β General purpose I/O or timer input |
| Pin 8 | PB1 β General purpose I/O or timer input |
| Pin 9 | PB2 β General purpose I/O or timer input |
| Pin 10 | PB3 β General purpose I/O or timer input |
| Pin 11 | PB4 β General purpose I/O or timer input |
| Pin 12 | PB5 β General purpose I/O or timer input |
| Pin 13 | PB6 β General purpose I/O or I2C SCL |
| Pin 14 | PB7 β General purpose I/O or I2C SDA |
| Pin 15 | PC0 β General purpose I/O or ADC input |
| Pin 16 | PC1 β General purpose I/O or ADC input |
| Pin 17 | PC2 β General purpose I/O or ADC input |
| Pin 18 | PC3 β General purpose I/O or ADC input |
| Pin 19 | PC4 β General purpose I/O or ADC input |
| Pin 20 | PC5 β General purpose I/O or ADC input |
| Pin 21 | PC6 β General purpose I/O or SPI SCK |
| Pin 22 | PC7 β General purpose I/O or SPI MISO |
| Pin 23 | PD0 β General purpose I/O or SPI MOSI |
| Pin 24 | PD1 β General purpose I/O or SPI NSS |
| Pin 25 | PD2 β General purpose I/O or UART TX |
| Pin 26 | PD3 β General purpose I/O or UART RX |
| Pin 27 | PD4 β General purpose I/O |
| Pin 28 | PD5 β General purpose I/O |
| Pin 29 | NRST β Reset input, active low |
| Pin 30 | VDDA β Analog power supply |
| Pin 31 | VSSA β Analog ground |
| 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
STM8AF6226TCY is suitable for 6 applications: Automotive Body Control Module, Automotive Lighting Control, Seat Control Module, Window Lift Control, Sensor Interface Module, Industrial Control.
Automotive Body Control Module
The STM8AF6226TCY is well-suited for automotive body control modules (BCMs) that manage lighting, wipers, and door locks. Its AEC-Q100 Grade 0 qualification ensures reliable operation from -40Β°C to +150Β°C, covering extreme under-hood and in-cabin environments. The 16 MHz STM8A core provides sufficient processing power for real-time control loops, while the integrated 10-bit ADC (7 channels) monitors analog signals such as battery voltage and switch inputs. The 8 KB Flash and 1 KB SRAM are adequate for BCM firmware that handles multiple I/O and communication protocols. The UART, SPI, and I2C interfaces enable connection to external sensors and actuators. In a typical BCM, the MCU reads switch states, controls relay drivers, and communicates with other ECUs via LIN or CAN (through an external transceiver). The low-power Halt mode (1.5 Β΅A) helps reduce quiescent current when the vehicle is off, preserving battery life. Designers should ensure proper decoupling and use the internal watchdog to prevent software failures.
Recommended
Automotive Lighting Control
The STM8AF6226TCY is ideal for automotive lighting control, including LED and halogen lamps. Its 16-bit timers generate PWM signals for dimming and brightness control, while the 10-bit ADC monitors lamp current for diagnostics and fault detection. The wide operating voltage range (3.0V to 5.5V) allows direct connection to the vehicle's battery system, and the AEC-Q100 Grade 0 qualification ensures operation in high-temperature environments near engine compartments. In a typical lighting module, the MCU receives commands from a body controller via LIN, adjusts PWM duty cycles to control light intensity, and reads current sensors to detect open or short circuits. The 8 KB Flash is sufficient for storing calibration tables and fault codes. The device's robust ESD protection and clock security system enhance reliability. Designers should use the internal oscillator to save cost, but for precise timing, an external crystal can be connected. The low-power modes help reduce current draw when the lights are off.
Recommended
Seat Control Module
The STM8AF6226TCY is used in seat control modules to manage motorized seat adjustments, heating, and memory functions. Its multiple timers and PWM outputs control DC motors for forward/backward, tilt, and lumbar support. The 10-bit ADC reads potentiometer positions for memory seat settings, and the UART interface communicates with the body controller. The AEC-Q100 Grade 0 temperature range ensures reliable operation in the passenger cabin, which can reach high temperatures in summer. The 8 KB Flash stores seat position profiles, and the EEPROM retains settings across power cycles. The device's low-power modes reduce current consumption when the seat is idle. In a typical application, the MCU reads switch inputs, drives motor drivers via PWM, and monitors current to detect obstructions. The integrated watchdog timer prevents software lockups, enhancing safety. Designers should implement a brown-out reset to handle voltage dips during motor startup.
Recommended
Window Lift Control
The STM8AF6226TCY is well-suited for window lift control systems, where it manages the window motor, detects obstacles, and communicates with the body controller. Its 16-bit timers generate PWM signals for smooth motor speed control, and the 10-bit ADC monitors motor current to detect obstructions (e.g., a hand or object in the window path). The device's wide temperature range and AEC-Q100 qualification make it suitable for door-mounted applications. The UART interface allows communication with the central body controller for commands and status reporting. The 8 KB Flash is sufficient for the control algorithm, and the EEPROM stores window position calibration data. In a typical application, the MCU reads switch inputs, drives the motor via a relay or H-bridge, and uses the watchdog timer to ensure safe operation. The low-power Halt mode reduces current draw when the window is not in use. Designers should implement a current-sensing circuit with the ADC to enable anti-pinch functionality.
Recommended
Sensor Interface Module
The STM8AF6226TCY is used in sensor interface modules to read analog and digital sensors, process data, and transmit results over communication buses. Its 10-bit ADC with 7 channels can interface with temperature sensors, pressure sensors, and position sensors. The SPI and I2C interfaces allow connection to digital sensors and external memory. The UART interface enables communication with a central ECU. The device's low power consumption and wide temperature range make it suitable for distributed sensor nodes in a vehicle. In a typical application, the MCU periodically samples sensor data, applies calibration algorithms, and sends the processed values over LIN or CAN. The 8 KB Flash stores calibration tables, and the EEPROM retains sensor offsets. The device's robust ESD protection ensures reliability in harsh automotive environments. Designers should use the internal oscillator for cost savings, but for time-critical applications, an external crystal is recommended.
Recommended
Industrial Control
The STM8AF6226TCY is also suitable for industrial control applications such as motor control, lighting control, and sensor monitoring. Its 16 MHz core and rich peripheral set provide adequate performance for real-time control loops. The 10-bit ADC and timers enable precise motor speed control and PWM generation. The UART, SPI, and I2C interfaces allow communication with industrial networks and sensors. The device's wide operating voltage range (3.0V to 5.5V) and temperature range (-40Β°C to +150Β°C) make it robust for harsh industrial environments. In a typical application, the MCU controls a brushless DC motor using PWM, reads encoder feedback, and communicates with a PLC via Modbus. The 8 KB Flash is sufficient for the control algorithm, and the EEPROM stores configuration parameters. The device's low-power modes help reduce energy consumption in battery-powered industrial sensors. Designers should implement proper isolation and filtering for industrial noise immunity.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6226TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6226TAY | STM8AF6223TCY | STM8AF6226TCX |
|---|---|---|---|---|
| Package | LQFP-32 (7x7 mm) | LQFP-32 (7x7 mm) - same | LQFP-32 (7x7 mm) - same | LQFP-32 (7x7 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 8 KB | 8 KB | 4 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Operating Temperature Range | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +125Β°C |
| AEC-Q100 Grade | Grade 0 | Grade 0 | Grade 0 | Grade 1 |
Key Differentiators
- AEC-Q100 Grade 0 qualification (vs STM8AF6226TCX)
- 8 KB Flash memory (vs STM8AF6223TCY)
- Pin-compatible with STM8AF6226TAY (vs STM8AF6226TAY)
Design Notes
The STM8AF6226TCY operates from 3.0V to 5.5V. Place a 100 nF ceramic capacitor close to each VDD pin and a 1 Β΅F capacitor on VDDA. For automotive applications, consider adding a transient voltage suppressor (TVS) on the power input to protect against load dump and ESD events. The device has an internal brown-out reset (BOR) that resets the MCU when the supply drops below a threshold, ensuring safe operation during voltage dips.
For the LQFP-32 package, ensure proper solder paste stencil design to avoid bridging between pins. Use a 0.15 mm stencil thickness and follow IPC-7525 guidelines. Place decoupling capacitors as close as possible to the power pins, and use a solid ground plane to minimize noise. For automotive applications, conformal coating is recommended to protect against moisture and vibration.
Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups to avoid excessive current consumption. The NRST pin should have a 100 nF capacitor to ground for reliable reset. When using the ADC, ensure the analog reference is stable and decoupled. The internal oscillator is accurate to Β±2% over temperature, but for time-critical applications, use an external crystal.
Compliance Information
AEC-Q100 Grade 0 qualified. RoHS compliant per STMicroelectronics product page. REACH compliance is assumed based on ST's environmental policy.
