STM8AF6246TCY - 8-bit Automotive MCU, 32KB Flash | STMicroelectronics
MPN: STM8AF6246TCY 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 | $1.95 | $1,950.00 |
Drop-in alternatives for STM8AF6246TCY 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:
STM8AF6246TAY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6246TCX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6246TDY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226TCY
β Drop-Inβ 99,999 In Stock
$1.38 / Unit
View Datasheet βSTM8AF6266TCY
β Drop-Inβ 99,999 In Stock
$2.09 / Unit
View Datasheet βS08DZ60
β‘ Same Packageπ Reference alternative (not in catalog)
STM8AF6246TCY Maximum Ratings & Electrical Characteristics
| Core | STM8 8-bit |
| Max Clock Frequency | 16 MHz |
| Flash Memory | 32 KB |
| RAM | 2 KB |
| EEPROM | 1 KB |
| Supply Voltage | 3.0V to 5.5V |
| Operating Temperature | -40Β°C to +150Β°C |
| Package | LQFP-32 (7x7 mm) |
| ADC | 10-bit, 10 channels |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | UART, SPI, I2C, CAN 2.0B |
| GPIO | Up to 28 I/O |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| Low Power Modes | Halt, Active-Halt, Wait |
STM8AF6246TCY Pin Configuration
| Pin 1 | VDD β Digital power supply |
| Pin 2 | VSS β Digital ground |
| Pin 3 | PA0 β GPIO / ADC input |
| Pin 4 | PA1 β GPIO / ADC input |
| Pin 5 | PA2 β GPIO / ADC input |
| Pin 6 | PA3 β GPIO / ADC input |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | PA4 β GPIO / ADC input |
| Pin 9 | PA5 β GPIO / ADC input |
| Pin 10 | PA6 β GPIO / ADC input |
| Pin 11 | PA7 β GPIO / ADC input |
| Pin 12 | PB0 β GPIO / SPI MOSI |
| Pin 13 | PB1 β GPIO / SPI MISO |
| Pin 14 | PB2 β GPIO / SPI SCK |
| Pin 15 | PB3 β GPIO / SPI NSS |
| Pin 16 | PB4 β GPIO / I2C SCL |
| Pin 17 | PB5 β GPIO / I2C SDA |
| Pin 18 | PB6 β GPIO / UART TX |
| Pin 19 | PB7 β GPIO / UART RX |
| Pin 20 | PC0 β GPIO / CAN RX |
| Pin 21 | PC1 β GPIO / CAN TX |
| Pin 22 | PC2 β GPIO / Timer input |
| Pin 23 | PC3 β GPIO / Timer output |
| Pin 24 | PC4 β GPIO / Timer input |
| Pin 25 | PC5 β GPIO / Timer output |
| Pin 26 | PC6 β GPIO / Timer input |
| Pin 27 | PC7 β GPIO / Timer output |
| Pin 28 | PD0 β GPIO / OSC_IN |
| Pin 29 | PD1 β GPIO / OSC_OUT |
| 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
STM8AF6246TCY is suitable for 6 applications: Automotive Body Control Module, Window Lift Control, HVAC Control, Lighting Control, Motor Control, Industrial Automation.
Automotive Body Control Module
The STM8AF6246TCY is ideal for body control modules (BCM) that manage lighting, wipers, door locks, and window lifts. Its 32KB Flash and 2KB RAM are sufficient for BCM firmware, while the CAN interface enables communication with other ECUs. The wide operating temperature range (-40Β°C to +150Β°C) ensures reliable operation in harsh automotive environments. The device's low-power modes help reduce battery drain when the vehicle is off. In a typical BCM, the MCU reads switch inputs, controls relay drivers, and communicates over CAN to report status. The 10-bit ADC can monitor analog sensors such as temperature or light sensors. The robust EMC performance minimizes the risk of malfunction due to electromagnetic interference from motors and solenoids.
Recommended
Window Lift Control
The STM8AF6246TCY is well-suited for window lift control systems, where it manages the DC motor direction and speed. Its 16 MHz clock and 16-bit timers provide precise PWM generation for motor speed control. The device's 10-bit ADC can sense current to detect obstacles and implement anti-pinch functionality. The CAN interface allows the window lift module to receive commands from the BCM or door module. The device's automotive qualification ensures reliable operation over the vehicle's lifetime. In a typical window lift application, the MCU reads the switch position, controls the motor via a relay or H-bridge, and monitors the motor current for stall detection. The low-power modes are useful for reducing current draw when the window is not being operated.
Recommended
HVAC Control
The STM8AF6246TCY is used in HVAC control modules to manage heating, ventilation, and air conditioning. Its multiple timers and PWM outputs can control blower motors and actuator positions. The 10-bit ADC reads temperature sensors and potentiometers for user settings. The CAN interface enables communication with the climate control unit and other ECUs. The device's wide temperature range and AEC-Q100 qualification make it suitable for under-dash installations. In a typical HVAC application, the MCU reads the temperature setpoint, controls the blower speed via PWM, and adjusts the air mix door actuator. The device's low-power modes help reduce battery drain when the vehicle is off.
Recommended
Lighting Control
The STM8AF6246TCY is ideal for automotive lighting control, including headlamps, tail lamps, and interior lighting. Its PWM outputs can dim LEDs, and the 10-bit ADC can monitor light sensor inputs for automatic headlamp control. The CAN interface allows the lighting module to receive commands from the BCM. The device's automotive qualification ensures reliable operation in extreme temperatures. In a typical lighting application, the MCU controls LED drivers via PWM, reads ambient light sensors, and communicates over CAN to report status. The device's low-power modes are useful for reducing current draw when the lights are off.
Recommended
Motor Control
The STM8AF6246TCY is used in automotive motor control applications such as seat adjustment, mirror adjustment, and cooling fan control. Its 16-bit timers generate precise PWM signals for motor speed and direction control. The 10-bit ADC can sense motor current for stall detection and overload protection. The CAN interface enables communication with the BCM or other ECUs. The device's wide temperature range and robust EMC performance make it suitable for under-hood applications. In a typical motor control application, the MCU reads the switch input, controls the motor via an H-bridge, and monitors the motor current for fault detection.
Recommended
Industrial Automation
The STM8AF6246TCY is also suitable for industrial automation applications such as PLCs, sensors, and actuators. Its 16 MHz clock and rich peripheral set (UART, SPI, I2C, CAN) enable communication with industrial networks. The 10-bit ADC can interface with analog sensors, and the timers can generate PWM for controlling actuators. The device's wide operating temperature range and AEC-Q100 qualification ensure reliability in industrial environments. In a typical industrial application, the MCU reads sensor data, processes it, and communicates over Modbus or CANopen. The device's low-power modes are useful for battery-powered industrial sensors.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6246TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6246TAY | STM8AF6246TCX | STM8AF6246TDY | STM8AF6226TCY | STM8AF6266TCY | S08DZ60 |
|---|---|---|---|---|---|---|---|
| Package | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 | LQFP-32 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors |
| Core | STM8 8-bit | STM8 8-bit | STM8 8-bit | STM8 8-bit | STM8 8-bit | STM8 8-bit | S08 8-bit |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 20 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 8 KB | 64 KB | 60 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 4 KB | 4 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 0.5 KB | 2 KB | 2 KB |
| Operating Temperature | -40Β°C to +150Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +105Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +125Β°C |
Key Differentiators
- Extended temperature range up to +150Β°C (vs STM8AF6246TAY)
- Integrated CAN 2.0B controller (vs S08DZ60)
- True EEPROM with 300k endurance (vs STM8AF6226TCY)
Design Notes
Decouple the VDD and VDDA pins with 100nF and 4.7Β΅F capacitors placed as close to the pins as possible. Use a 0.1Β΅F capacitor on the NRST pin for reset filtering. The device operates from 3.0V to 5.5V, so ensure the supply is stable and within this range under all load conditions.
For CAN communication, place the CAN transceiver (e.g., TJA1050) close to the MCU and use a 120Ξ© termination resistor at each end of the bus. Keep the CAN bus traces short and shielded if possible. For the crystal oscillator, place the crystal and load capacitors close to the OSC_IN and OSC_OUT pins to minimize parasitic capacitance.
Ensure the NRST pin is pulled high with a 10kΞ© resistor and a 100nF capacitor to ground to prevent spurious resets. Do not exceed the absolute maximum ratings for VDD (6.5V) or any I/O pin. For EEPROM endurance, note that the device supports 300k write/erase cycles; use wear leveling if frequent writes are expected.
Compliance Information
AEC-Q100 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST's environmental policy.
