STM8AF6166 - 8-bit Automotive MCU, 32KB Flash | STMicroelectronics
MPN: STM8AF6166 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.95 | $29.50 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for STM8AF6166 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:
STM8AF6168
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6169
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6188
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6226
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6266
β Drop-Inπ Reference alternative (not in catalog)
STM8AF6166 Maximum Ratings & Electrical Characteristics
| Core | STM8A 8-bit |
| Max Clock Frequency | 16 MHz |
| Flash Memory | 32 KB |
| RAM | 2 KB |
| EEPROM | 1 KB (with ECC) |
| Supply Voltage | 3.0 V to 5.5 V |
| Operating Temperature | -40Β°C to +150Β°C |
| Package | LQFP-48 (7x7 mm) |
| ADC | 10-bit, 10 channels |
| Timers | 2x 16-bit, 1x 8-bit |
| Communication Interfaces | UART, SPI, I2C |
| GPIO Pins | 38 |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| Low Power Mode | Halt mode 10 Β΅A typical |
STM8AF6166 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 | PA4 β GPIO / ADC input |
| Pin 8 | PA5 β GPIO / ADC input |
| Pin 9 | PA6 β GPIO / ADC input |
| Pin 10 | PA7 β GPIO / ADC input |
| Pin 11 | PB0 β GPIO / SPI MOSI |
| Pin 12 | PB1 β GPIO / SPI MISO |
| Pin 13 | PB2 β GPIO / SPI SCK |
| Pin 14 | PB3 β GPIO / SPI NSS |
| Pin 15 | PB4 β GPIO / I2C SCL |
| Pin 16 | PB5 β GPIO / I2C SDA |
| Pin 17 | PB6 β GPIO / UART TX |
| Pin 18 | PB7 β GPIO / UART RX |
| Pin 19 | PC0 β GPIO / Timer input |
| Pin 20 | PC1 β GPIO / Timer input |
| Pin 21 | PC2 β GPIO / Timer input |
| Pin 22 | PC3 β GPIO / Timer input |
| Pin 23 | PC4 β GPIO / Timer input |
| Pin 24 | PC5 β GPIO / Timer input |
| Pin 25 | PC6 β GPIO / Timer input |
| Pin 26 | PC7 β GPIO / Timer input |
| Pin 27 | PD0 β GPIO / Timer output |
| Pin 28 | PD1 β GPIO / Timer output |
| Pin 29 | PD2 β GPIO / Timer output |
| Pin 30 | PD3 β GPIO / Timer output |
| Pin 31 | PD4 β GPIO / Timer output |
| Pin 32 | PD5 β GPIO / Timer output |
| Pin 33 | PD6 β GPIO / Timer output |
| Pin 34 | PD7 β GPIO / Timer output |
| Pin 35 | PE0 β GPIO / SWIM |
| Pin 36 | PE1 β GPIO / NRST |
| Pin 37 | PE2 β GPIO / OSC_IN |
| Pin 38 | PE3 β GPIO / OSC_OUT |
| Pin 39 | PE4 β GPIO / ADC input |
| Pin 40 | PE5 β GPIO / ADC input |
| Pin 41 | PE6 β GPIO / ADC input |
| Pin 42 | PE7 β GPIO / ADC input |
| Pin 43 | PF0 β GPIO / ADC input |
| Pin 44 | PF1 β GPIO / ADC input |
| Pin 45 | PF2 β GPIO / ADC input |
| Pin 46 | PF3 β GPIO / ADC input |
| Pin 47 | VDDA β Analog power supply |
| Pin 48 | VSSA β Analog 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
STM8AF6166 is suitable for 6 applications: Automotive Body Control Module, Motor Control for Pumps and Fans, Window Lift Control, Seat Control Module, Lighting Control, HVAC Control.
Automotive Body Control Module
The STM8AF6166 is ideal for body control modules (BCM) that manage lighting, wipers, and door locks. Its 16 MHz clock and 32 KB Flash handle control algorithms, while the 10-bit ADC reads switch inputs and sensor signals. The wide operating temperature range (-40Β°C to +150Β°C) ensures reliable operation in harsh automotive environments. The integrated EEPROM stores configuration data and fault codes, reducing external component count. Communication interfaces (UART, SPI, I2C) enable connection to other ECUs and diagnostic tools. The AEC-Q100 qualification guarantees long-term reliability, making it a trusted choice for BCM designs.
Recommended
Motor Control for Pumps and Fans
The STM8AF6166 is well-suited for controlling brushless DC (BLDC) motors in automotive pumps and fans. Its 16-bit timers generate PWM signals with high resolution, and the 10-bit ADC samples current and position sensors. The 16 MHz clock enables fast control loops, while the 32 KB Flash stores motor control algorithms. The device's robust EMC performance minimizes interference in noisy automotive environments. The low-power halt mode (10 Β΅A) is beneficial for standby operation. With AEC-Q100 qualification, it meets the reliability demands of continuous motor operation.
Recommended
Window Lift Control
The STM8AF6166 is used in window lift control units to manage motor direction and speed. Its GPIO pins interface with limit switches and user buttons, while the 16-bit timer generates PWM for smooth motor operation. The 10-bit ADC can monitor motor current for anti-pinch detection. The 32 KB Flash stores control logic and calibration data. The wide supply voltage range (3.0V to 5.5V) allows direct connection to the car battery. The device's high temperature rating ensures operation in door panels exposed to heat. AEC-Q100 qualification ensures long service life in this safety-relevant application.
Recommended
Seat Control Module
The STM8AF6166 is suitable for seat control modules that adjust seat position and lumbar support. Its multiple timers and PWM outputs drive DC motors for seat adjustment, while the ADC reads potentiometer positions for feedback. The 32 KB Flash stores seat position profiles. The UART interface allows communication with the central body controller. The device's low-power mode is useful for maintaining memory when the ignition is off. The AEC-Q100 qualification and wide temperature range make it reliable for this comfort application.
Recommended
Lighting Control
The STM8AF6166 is used in automotive lighting control for headlamps, taillights, and interior lighting. Its PWM timers control LED brightness, and the ADC monitors ambient light sensors for automatic dimming. The 32 KB Flash stores lighting patterns and diagnostics. The SPI interface can communicate with LED drivers. The device's robust EMC performance prevents interference with other vehicle electronics. The wide temperature range supports operation in exterior lighting modules. AEC-Q100 qualification ensures reliability in this critical safety function.
Recommended
HVAC Control
The STM8AF6166 is ideal for HVAC (heating, ventilation, and air conditioning) control units. It manages blower motors, damper actuators, and temperature sensors. The 10-bit ADC reads temperature and humidity sensors, while the PWM timers control motor speed. The 32 KB Flash stores control algorithms for climate regulation. The I2C interface connects to external sensors. The device's low-power mode is beneficial for maintaining settings in standby. The AEC-Q100 qualification and wide temperature range make it suitable for this comfort and safety application.
Recommended
Recommended Products Summary
Engineering reference data for STM8AF6166 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AF6168 | STM8AF6169 | STM8AF6188 | STM8AF6226 |
|---|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 | LQFP-48 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 32 KB | 64 KB | 128 KB | 128 KB | 8 KB |
| RAM | 2 KB | 6 KB | 6 KB | 6 KB | 1 KB |
| EEPROM | 1 KB | 2 KB | 2 KB | 2 KB | 0.5 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Temperature | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C |
Key Differentiators
- Automotive-grade with AEC-Q100 qualification (vs STM8S208 (non-automotive))
- Wide operating temperature range up to 150Β°C (vs STM8S105 (up to 85Β°C))
- Integrated EEPROM with ECC (vs STM8S103 (no ECC))
Design Notes
Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close to the pins as possible. Additionally, use a 4.7 Β΅F bulk capacitor on VDD to handle transient currents. For automotive applications, consider adding a reverse polarity protection diode and a transient voltage suppressor (TVS) on the power input to withstand load dump and other transients.
For the LQFP-48 package, ensure proper solder paste stencil design to avoid solder bridging. Use a 0.5 mm pitch land pattern as recommended in the STM8AF6166 datasheet. Provide a solid ground plane under the MCU to reduce noise and improve EMC performance. Keep the SWIM pin accessible for programming and debugging, and add a 10 kΞ© pull-up resistor to VDD.
Do not exceed the absolute maximum ratings, especially the supply voltage (6.5V) and input voltages on GPIO pins. Ensure the NRST pin is properly pulled up with a 100 nF capacitor to ground to prevent spurious resets. When using the ADC, avoid floating input pins by configuring them as analog inputs or connecting them to a known voltage. For reliable operation, enable the watchdog timer in automotive applications to recover from software faults.
Compliance Information
AEC-Q100 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST's environmental policy.
