STM8AF5286TCY - 8-bit Automotive MCU, 64KB Flash, LQFP64 | STMicroelectronics
MPN: STM8AF5286TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.32 | $4.32 |
| 10 | $3.89 | $38.90 |
| 100 | $3.46 | $346.00 |
| 500 | $3.11 | $1,555.00 |
| 1,000 | $2.77 | $2,770.00 |
Drop-in alternatives for STM8AF5286TCY 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:
STM8AF5288TCY
β Drop-Inβ 99,999 In Stock
$1.85 / Unit
View Datasheet βSTM8AF5268TCY
β Drop-Inβ 99,999 In Stock
$2.77 / Unit
View Datasheet βSTM8AF5286TDY
β Drop-Inπ Reference alternative (not in catalog)
STM8AF5286TAY
β Drop-Inπ Reference alternative (not in catalog)
S9S08DZ60MLC
β‘ Same Packageπ Reference alternative (not in catalog)
R5F10BBF8AFP
β‘ Same Packageπ Reference alternative (not in catalog)
STM8AF5286TCY Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Maximum CPU Frequency | 24 MHz |
| Flash Memory | 64 KB |
| RAM | 6 KB |
| EEPROM | 2 KB |
| Supply Voltage | 3.3V to 5V |
| Operating Temperature | -40Β°C to +150Β°C |
| Package | LQFP64 |
| Number of I/O Pins | 52 |
| ADC Resolution | 10-bit |
| ADC Channels | 16 |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | UART, SPI, I2C, CAN 2.0B |
| CAN Controller | Yes |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
STM8AF5286TCY Pin Configuration
| Pin 1 | PE0 β General purpose I/O, 5V tolerant |
| Pin 2 | PE1 β General purpose I/O, 5V tolerant |
| Pin 3 | PE2 β General purpose I/O, 5V tolerant |
| Pin 4 | PE3 β General purpose I/O, 5V tolerant |
| Pin 5 | PE4 β General purpose I/O, 5V tolerant |
| Pin 6 | PE5 β General purpose I/O, 5V tolerant |
| Pin 7 | VSS β Ground |
| Pin 8 | VDD β Power supply (3.3V to 5V) |
| Pin 9 | PE6 β General purpose I/O, 5V tolerant |
| Pin 10 | PE7 β General purpose I/O, 5V tolerant |
| Pin 11 | PD0 β General purpose I/O, 5V tolerant |
| Pin 12 | PD1 β General purpose I/O, 5V tolerant |
| Pin 13 | PD2 β General purpose I/O, 5V tolerant |
| Pin 14 | PD3 β General purpose I/O, 5V tolerant |
| Pin 15 | PD4 β General purpose I/O, 5V tolerant |
| Pin 16 | PD5 β General purpose I/O, 5V tolerant |
| Pin 17 | PD6 β General purpose I/O, 5V tolerant |
| Pin 18 | PD7 β General purpose I/O, 5V tolerant |
| Pin 19 | VSS β Ground |
| Pin 20 | VDD β Power supply (3.3V to 5V) |
| Pin 21 | PC0 β General purpose I/O, 5V tolerant |
| Pin 22 | PC1 β General purpose I/O, 5V tolerant |
| Pin 23 | PC2 β General purpose I/O, 5V tolerant |
| Pin 24 | PC3 β General purpose I/O, 5V tolerant |
| Pin 25 | PC4 β General purpose I/O, 5V tolerant |
| Pin 26 | PC5 β General purpose I/O, 5V tolerant |
| Pin 27 | PC6 β General purpose I/O, 5V tolerant |
| Pin 28 | PC7 β General purpose I/O, 5V tolerant |
| Pin 29 | PB0 β General purpose I/O, 5V tolerant |
| Pin 30 | PB1 β General purpose I/O, 5V tolerant |
| Pin 31 | PB2 β General purpose I/O, 5V tolerant |
| Pin 32 | PB3 β General purpose I/O, 5V tolerant |
| Pin 33 | PB4 β General purpose I/O, 5V tolerant |
| Pin 34 | PB5 β General purpose I/O, 5V tolerant |
| Pin 35 | PB6 β General purpose I/O, 5V tolerant |
| Pin 36 | PB7 β General purpose I/O, 5V tolerant |
| Pin 37 | VSS β Ground |
| Pin 38 | VDD β Power supply (3.3V to 5V) |
| Pin 39 | PA0 β General purpose I/O, 5V tolerant |
| Pin 40 | PA1 β General purpose I/O, 5V tolerant |
| Pin 41 | PA2 β General purpose I/O, 5V tolerant |
| Pin 42 | PA3 β General purpose I/O, 5V tolerant |
| Pin 43 | PA4 β General purpose I/O, 5V tolerant |
| Pin 44 | PA5 β General purpose I/O, 5V tolerant |
| Pin 45 | PA6 β General purpose I/O, 5V tolerant |
| Pin 46 | PA7 β General purpose I/O, 5V tolerant |
| Pin 47 | NRST β Reset (active low) |
| Pin 48 | VSS β Ground |
| Pin 49 | VDD β Power supply (3.3V to 5V) |
| Pin 50 | PF0 β General purpose I/O, 5V tolerant |
| Pin 51 | PF1 β General purpose I/O, 5V tolerant |
| Pin 52 | PF2 β General purpose I/O, 5V tolerant |
| Pin 53 | PF3 β General purpose I/O, 5V tolerant |
| Pin 54 | PF4 β General purpose I/O, 5V tolerant |
| Pin 55 | PF5 β General purpose I/O, 5V tolerant |
| Pin 56 | PF6 β General purpose I/O, 5V tolerant |
| Pin 57 | PF7 β General purpose I/O, 5V tolerant |
| Pin 58 | VSS β Ground |
| Pin 59 | VDD β Power supply (3.3V to 5V) |
| Pin 60 | PG0 β General purpose I/O, 5V tolerant |
| Pin 61 | PG1 β General purpose I/O, 5V tolerant |
| Pin 62 | PG2 β General purpose I/O, 5V tolerant |
| Pin 63 | PG3 β General purpose I/O, 5V tolerant |
| Pin 64 | PG4 β General purpose I/O, 5V tolerant |
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
STM8AF5286TCY is suitable for 6 applications: Automotive Body Control Module (BCM), Motor Control for Pumps and Fans, HVAC Control System, Industrial Automation and Smart Sensors, Power Window and Seat Control, Battery Management System (BMS) for Auxiliary Batteries.
Automotive Body Control Module (BCM)
The STM8AF5286TCY is ideal for body control modules that manage lighting, power windows, door locks, and mirror controls. Its CAN interface enables communication with the vehicle's network, while the 10-bit ADC reads analog sensors for ambient light and temperature. The wide operating temperature range (-40Β°C to +150Β°C) and AEC-Q100 qualification ensure reliable operation in extreme automotive environments. The 64 KB Flash provides ample code space for complex control algorithms, and the low-power halt mode (1 Β΅A) helps meet standby current regulations. In a typical BCM, the MCU interfaces with relay drivers, LIN transceivers, and switch inputs, using its timers for PWM dimming of interior lights. The robust I/O structure with 5V tolerance simplifies direct connection to legacy switches and sensors, reducing BOM cost.
Recommended
Motor Control for Pumps and Fans
The STM8AF5286TCY is well-suited for controlling brushless DC (BLDC) motors in automotive cooling fans, water pumps, and oil pumps. Its two 16-bit timers generate complementary PWM signals for three-phase inverters, while the 10-bit ADC samples motor currents and rotor position sensors. The CAN interface allows the motor controller to receive speed commands from the engine control unit (ECU). The MCU's fast interrupt response and 24 MHz core enable real-time control loops with high bandwidth. In a typical application, the MCU runs a sensorless FOC algorithm, using the ADC to measure phase currents and the timers to generate PWM at 20 kHz. The automotive-grade temperature range ensures reliable operation under the hood, where ambient temperatures can exceed 125Β°C. The 64 KB Flash is sufficient for complex control algorithms, and the EEPROM stores calibration data and fault logs.
Recommended
HVAC Control System
The STM8AF5286TCY is used in automotive HVAC control units to manage temperature, airflow, and blower speed. It reads temperature sensors via the ADC, controls actuator motors with PWM, and communicates with the climate control panel via LIN or CAN. The device's 5V-tolerant I/O allows direct connection to potentiometers and switches. The low-power mode is beneficial for maintaining memory of user settings when the ignition is off. In a typical HVAC system, the MCU interfaces with a blower motor driver, stepper motors for air direction flaps, and a temperature sensor array. The 64 KB Flash stores the control logic and calibration tables, while the EEPROM retains user preferences. The AEC-Q100 qualification ensures long-term reliability in the passenger compartment, where temperature and humidity vary widely.
Recommended
Industrial Automation and Smart Sensors
Beyond automotive, the STM8AF5286TCY is used in industrial automation for controlling conveyor belts, robotic arms, and smart sensors. Its robust I/O, wide supply voltage, and CAN interface make it suitable for factory floor networking. The 10-bit ADC reads analog sensors for pressure, temperature, and position. The device's high reliability and extended temperature range allow deployment in harsh industrial environments. In a typical smart sensor application, the MCU acquires data from a sensor, processes it, and transmits it over CAN to a central controller. The 64 KB Flash enables sophisticated signal processing algorithms, and the EEPROM stores calibration coefficients. The low-power mode is useful for battery-powered wireless sensor nodes, although the CAN interface is typically used in wired installations.
Recommended
Power Window and Seat Control
The STM8AF5286TCY is used in power window and seat control modules, where it manages DC motors with position feedback. The MCU's timers generate PWM for motor speed control, and the ADC reads potentiometers or Hall sensors for position. The CAN interface allows coordination between multiple modules, such as driver and passenger windows. The device's robust I/O and built-in protection features, such as the window watchdog, enhance system safety. In a typical power window module, the MCU detects switch inputs, controls the motor via a relay or MOSFET driver, and monitors current to detect obstructions. The 64 KB Flash stores the control logic and anti-pinch algorithms, while the EEPROM stores window position calibration. The AEC-Q100 qualification ensures reliable operation over the vehicle's lifetime.
Recommended
Battery Management System (BMS) for Auxiliary Batteries
The STM8AF5286TCY is used in battery management systems for auxiliary batteries in hybrid and electric vehicles. It monitors cell voltages, temperatures, and currents using the ADC, and communicates with the main BMS via CAN. The MCU's low-power mode is critical for maintaining battery state-of-charge monitoring when the vehicle is off. The 64 KB Flash stores the state-of-charge estimation algorithms, and the EEPROM logs historical data. In a typical BMS, the MCU interfaces with a battery monitoring IC, such as the LTC6804, via SPI, and controls balancing switches. The automotive-grade temperature range ensures reliable operation in the battery pack, where temperatures can range from -40Β°C to +85Β°C. The CAN interface allows the BMS to report status to the vehicle's central controller.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF5286TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF5288TCY | STM8AF5268TCY | S9S08DZ60MLC |
|---|---|---|---|---|
| Package | LQFP64 | LQFP64 - same | LQFP64 - same | LQFP64 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors |
| Core | STM8A 8-bit | STM8A 8-bit | STM8A 8-bit | S08 8-bit |
| Maximum CPU Frequency | 24 MHz | 24 MHz | 24 MHz | 20 MHz |
| Flash Memory | 64 KB | 128 KB | 32 KB | 60 KB |
| RAM | 6 KB | 6 KB | 4 KB | 4 KB |
| EEPROM | 2 KB | 2 KB | 1 KB | 2 KB |
| CAN Interface | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 12-bit |
| Operating Temperature | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +125Β°C |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified |
Key Differentiators
- Extended temperature range up to 150Β°C (vs S9S08DZ60MLC)
- Higher CPU frequency (24 MHz vs 20 MHz) (vs S9S08DZ60MLC)
- Larger RAM (6 KB vs 4 KB) (vs STM8AF5268TCY)
Design Notes
Decouple the VDD and VDDA pins with a 100nF ceramic capacitor placed as close as possible to each pin, and a 4.7Β΅F bulk capacitor on the main supply. The VDDA pin (if present) should be filtered with a ferrite bead to reduce noise for the ADC. Ensure the supply voltage stays within 3.3V to 5V, and consider a supervisory circuit for brown-out detection.
For the LQFP64 package, use a 4-layer PCB with a solid ground plane. Place the crystal oscillator (if used) close to the OSC pins with short traces and a ground guard ring. Keep the CAN bus traces at 120Ξ© differential impedance and place the termination resistor at the end of the bus. For EMC, add series resistors and common-mode chokes on the CAN lines.
The NRST pin requires an external pull-up resistor (typically 10kΞ©) and a 100nF capacitor to ground for reliable reset. Do not leave unused I/O pins floating; configure them as outputs or enable internal pull-ups. When using the ADC, ensure the sampling time is sufficient for the source impedance. For CAN, the transceiver must be properly powered and the bus must be terminated to avoid communication errors.
Compliance Information
AEC-Q100 qualified per ST product page. RoHS compliant. Halogen-free status not explicitly stated in the provided data.
