STM8AF5289TCY - 8-bit Automotive MCU, 128KB Flash | STMicroelectronics
MPN: STM8AF5289TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for STM8AF5289TCY 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 βSTM8AF5289TCX
β Drop-Inπ Reference alternative (not in catalog)
STM8AF5289TDY
β Drop-Inπ Reference alternative (not in catalog)
R5F10BBF
β Drop-Inπ Reference alternative (not in catalog)
PIC18F46K80
β Drop-Inπ Reference alternative (not in catalog)
STM8AF5289TCY Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Maximum CPU Frequency | 24 MHz |
| Flash Memory | 128 KB |
| RAM | 6 KB |
| EEPROM | 2 KB |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Operating Temperature Range | -40C to +150C |
| Package | LQFP-64 |
| ADC Resolution | 12-bit |
| Number of ADC Channels | 16 |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | SPI, I2C, UART, LIN |
| AEC-Q100 Qualification | Yes |
| RoHS Compliance | Compliant |
| Mounting Type | Surface Mount |
STM8AF5289TCY Pin Configuration
| Pin 1 | VSS β Ground |
| Pin 2 | VDD β Power supply |
| Pin 3 | PA0 β General purpose I/O |
| Pin 4 | PA1 β General purpose I/O |
| Pin 5 | PA2 β General purpose I/O |
| Pin 6 | PA3 β General purpose I/O |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VSS β Ground |
| Pin 9 | VDD β Power supply |
| Pin 10 | PB0 β General purpose I/O |
| Pin 11 | PB1 β General purpose I/O |
| Pin 12 | PB2 β General purpose I/O |
| Pin 13 | PB3 β General purpose I/O |
| Pin 14 | PB4 β General purpose I/O |
| Pin 15 | PB5 β General purpose I/O |
| Pin 16 | PB6 β General purpose I/O |
| Pin 17 | PB7 β General purpose I/O |
| Pin 18 | VSS β Ground |
| Pin 19 | VDD β Power supply |
| Pin 20 | PC0 β General purpose I/O |
| Pin 21 | PC1 β General purpose I/O |
| Pin 22 | PC2 β General purpose I/O |
| Pin 23 | PC3 β General purpose I/O |
| Pin 24 | PC4 β General purpose I/O |
| Pin 25 | PC5 β General purpose I/O |
| Pin 26 | PC6 β General purpose I/O |
| Pin 27 | PC7 β General purpose I/O |
| Pin 28 | VSS β Ground |
| Pin 29 | VDD β Power supply |
| Pin 30 | PD0 β General purpose I/O |
| Pin 31 | PD1 β General purpose I/O |
| Pin 32 | PD2 β General purpose I/O |
| Pin 33 | PD3 β General purpose I/O |
| Pin 34 | PD4 β General purpose I/O |
| Pin 35 | PD5 β General purpose I/O |
| Pin 36 | PD6 β General purpose I/O |
| Pin 37 | PD7 β General purpose I/O |
| Pin 38 | VSS β Ground |
| Pin 39 | VDD β Power supply |
| Pin 40 | PE0 β General purpose I/O |
| Pin 41 | PE1 β General purpose I/O |
| Pin 42 | PE2 β General purpose I/O |
| Pin 43 | PE3 β General purpose I/O |
| Pin 44 | PE4 β General purpose I/O |
| Pin 45 | PE5 β General purpose I/O |
| Pin 46 | PE6 β General purpose I/O |
| Pin 47 | PE7 β General purpose I/O |
| Pin 48 | VSS β Ground |
| Pin 49 | VDD β Power supply |
| Pin 50 | PF0 β General purpose I/O |
| Pin 51 | PF1 β General purpose I/O |
| Pin 52 | PF2 β General purpose I/O |
| Pin 53 | PF3 β General purpose I/O |
| Pin 54 | PF4 β General purpose I/O |
| Pin 55 | PF5 β General purpose I/O |
| Pin 56 | PF6 β General purpose I/O |
| Pin 57 | PF7 β General purpose I/O |
| Pin 58 | VSS β Ground |
| Pin 59 | VDD β Power supply |
| Pin 60 | PG0 β General purpose I/O |
| Pin 61 | PG1 β General purpose I/O |
| Pin 62 | PG2 β General purpose I/O |
| Pin 63 | PG3 β General purpose I/O |
| Pin 64 | PG4 β General purpose I/O |
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
STM8AF5289TCY is suitable for 6 applications: Automotive Body Control Module, Motor Control for Pumps and Fans, HVAC Control, Window Lift and Mirror Control, Lighting Control, Industrial Automation.
Automotive Body Control Module
The STM8AF5289TCY is ideal for body control modules (BCM) that manage lighting, windows, mirrors, and central locking. Its 128 KB Flash allows storing complex control algorithms, while the LIN interface enables communication with other ECUs. The AEC-Q100 qualification ensures reliability in harsh automotive environments. In a typical BCM, the MCU reads inputs from switches and sensors, processes them, and drives outputs such as relays and LEDs. The 12-bit ADC monitors analog signals like temperature and voltage. The device's low-power modes help reduce battery drain when the vehicle is off. Compared to 32-bit MCUs, the STM8AF5289TCY offers a cost-effective solution with sufficient performance for BCM tasks, while its wide temperature range (-40Β°C to +150Β°C) ensures operation in extreme conditions.
Recommended
Motor Control for Pumps and Fans
The STM8AF5289TCY is well-suited for controlling brushless DC (BLDC) motors in automotive pumps and fans. Its 24 MHz core and 16-bit timers generate PWM signals for motor drive, while the 12-bit ADC senses back-EMF for sensorless control. The device's robust communication interfaces (LIN, SPI) allow integration with vehicle networks. In a typical application, the MCU runs a field-oriented control (FOC) algorithm, requiring significant Flash and RAM, which the 128 KB Flash and 6 KB RAM provide. The high-temperature rating and AEC-Q100 qualification ensure reliable operation under hood. Compared to dedicated motor control ICs, this MCU offers flexibility for custom algorithms and reduces BOM cost by integrating multiple functions.
Recommended
HVAC Control
The STM8AF5289TCY is used in automotive HVAC (Heating, Ventilation, and Air Conditioning) control units to manage temperature, fan speed, and air distribution. Its multiple UART and LIN interfaces enable communication with sensors and actuators. The 12-bit ADC reads temperature sensors and potentiometers for user settings. The device's low-power modes are beneficial for maintaining settings when the ignition is off. The 128 KB Flash allows storing complex control algorithms for climate regulation. The AEC-Q100 qualification ensures reliability over the vehicle's lifetime. Compared to 16-bit MCUs, the STM8AF5289TCY provides sufficient performance at a lower cost, making it a popular choice for HVAC modules.
Recommended
Window Lift and Mirror Control
The STM8AF5289TCY is ideal for window lift and mirror control modules, where it manages DC motors with position feedback. Its 16-bit timers generate PWM for motor speed control, and the ADC reads potentiometers for position sensing. The device's LIN interface allows communication with the body control module. The 128 KB Flash stores anti-pinch algorithms that detect obstacles. The AEC-Q100 qualification ensures reliable operation in door modules exposed to temperature extremes. The device's small LQFP-64 package fits in compact door modules. Compared to dedicated motor driver ICs, this MCU offers flexibility for custom features like auto-close and memory positions.
Recommended
Lighting Control
The STM8AF5289TCY is used in automotive lighting control modules for headlamps, taillights, and interior lighting. Its PWM timers control LED brightness, and the LIN interface enables communication with the BCM. The 12-bit ADC monitors current for fault detection. The 128 KB Flash stores lighting patterns and diagnostics. The AEC-Q100 qualification ensures reliability in harsh conditions. The device's low-power modes help reduce battery drain when lights are off. Compared to dedicated LED driver ICs, this MCU provides flexibility for dynamic lighting effects and adaptive headlamps.
Recommended
Industrial Automation
The STM8AF5289TCY is also suitable for industrial automation applications such as PLCs, sensors, and motor drives. Its robust communication interfaces (SPI, I2C, UART) enable connectivity with industrial networks. The 12-bit ADC interfaces with analog sensors, and the timers generate precise PWM for control. The wide temperature range and AEC-Q100 qualification (though automotive-focused) indicate high reliability. The 128 KB Flash allows storing complex control algorithms. Compared to 32-bit MCUs, the STM8AF5289TCY offers a cost-effective solution for applications that do not require high computational power.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF5289TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF5288TCY | STM8AF5289TCX | STM8AF5289TDY | R5F10BBF | PIC18F46K80 |
|---|---|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Renesas Electronics | Microchip Technology |
| Flash Memory | 128 KB | 64 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| RAM | 6 KB | 6 KB | 6 KB | 6 KB | 8 KB | 3.6 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 8 KB | 1 KB |
| Max CPU Frequency | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 32 MHz | 64 MHz |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Larger Flash memory (128 KB) compared to STM8AF5288TCY (vs STM8AF5288TCY)
- AEC-Q100 qualified for automotive use (vs PIC18F46K80)
- True EEPROM with 300k write/erase cycles (vs PIC18F46K80)
Design Notes
Decouple the VDD and VDDA pins with 100nF ceramic capacitors placed as close to the pins as possible. Additionally, use a 4.7uF bulk capacitor on the main supply rail. For automotive applications, consider adding a reverse polarity protection diode and a transient voltage suppressor (TVS) on the power input to handle load dump and other transients.
For the LQFP-64 package, ensure proper grounding by connecting the exposed pad (if present) to the ground plane. Use a solid ground plane under the MCU to minimize noise. Keep high-speed traces (e.g., SPI, UART) short and away from analog signals. For the ADC, use separate analog ground and power planes if possible to reduce noise.
Do not leave unused I/O pins floating; configure them as outputs or enable internal pull-ups. Ensure the NRST pin has a 100nF capacitor to ground for reliable reset. When using the LIN interface, ensure proper termination and bus biasing. Also, verify that the firmware fits within the Flash memory size; if using the STM8AF5288TCY as a replacement, ensure code size is under 64 KB.
Compliance Information
AEC-Q100 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST's general compliance.
