STMicroelectronics

STM8AF5289TCY - 8-bit Automotive MCU, 128KB Flash | STMicroelectronics

Name: STM8AF5289TCY
Brand: STMicroelectronics

MPN: STM8AF5289TCY ✓ Aktif

3.0 V to 5.5 V Vdss LQFP-64 Package 24 MHz Speed 128 KB Memory

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STM8AF5289TCY Ringkasan

The STM8AF5289TCY is an 8-bit automotive-grade microcontroller from STMicroelectronics, featuring a high-performance STM8A core running at up to 24 MHz. It integrates 128 KB of Flash program memory, 6 KB of RAM, and 2 KB of EEPROM, making it suitable for body control modules, motor control, and other automotive applications. The device operates over a supply voltage range of 3.0V to 5.5V and is available in a 64-pin LQFP package.

An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data bus, typically used for embedded control applications. It integrates a CPU, memory (Flash, RAM, EEPROM), and peripherals such as timers, ADCs, and communication interfaces. In the automotive domain, 8-bit MCUs like the STM8AF series provide a cost-effective solution for real-time control tasks, bridging the gap between simple logic ICs and more complex 32-bit processors. They are part of the broader microcontroller hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit.

Key features of the STM8AF5289TCY include a 24 MHz maximum CPU frequency, 128 KB Flash with read-while-write capability, 6 KB SRAM, and 2 KB true EEPROM with up to 300k write/erase cycles. It offers a rich set of peripherals: two 16-bit timers, one 8-bit timer, a 12-bit ADC with up to 16 channels, and multiple communication interfaces including SPI, I2C, UART, and LIN. The device is AEC-Q100 qualified, ensuring reliability for automotive environments, and operates over a temperature range of -40°C to +150°C.

Technically, the STM8A core is based on a Harvard architecture with a 3-stage pipeline, achieving up to 20 MIPS at 24 MHz. The Flash memory supports in-application programming (IAP) and in-circuit programming (ICP), enabling firmware updates in the field. The EEPROM is separate from Flash, allowing data storage without affecting program memory. The device includes a comprehensive set of safety features, such as a watchdog timer, clock security system, and low-voltage detection, which are essential for automotive safety-critical applications.

Typical applications include automotive body control modules (BCM), window lift and mirror control, HVAC control, and motor control for pumps and fans. The STM8AF5289TCY's robust communication interfaces (LIN, SPI, I2C, UART) make it ideal for in-vehicle networking, while its high-temperature rating and AEC-Q100 qualification ensure reliable operation under harsh conditions.

When designing with this MCU, ensure proper decoupling of the VDD and VDDA pins with 100nF capacitors placed close to the pins. The NRST pin requires a 100nF capacitor to ground for reliable reset. For automotive applications, consider using the internal watchdog and clock security system to enhance system reliability. The device supports low-power modes (Wait, Active-Halt, Halt) to reduce current consumption in standby conditions.

Alternatif penggantian untuk STM8AF5289TCY — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.

STM8AF5288TCY

STMicroelectronics

STM8A · 8-bit CISC · 24 MHz · 64 KB (64K x 8) · 6 KB · 2 KB · 300k write/erase cycles · 3.0V to 5.5V

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STM8AF5289TCX

Same die, different temperature grade (TCX vs TCY)

📋 Alternatif referensi (tidak dalam katalog)

STM8AF5289TDY

Same die, different package variant (TDY vs TCY)

📋 Alternatif referensi (tidak dalam katalog)

R5F10BBF

Cross-brand, RL78/F13 core, similar peripherals, verify pinout

📋 Alternatif referensi (tidak dalam katalog)

PIC18F46K80

Cross-brand, 8-bit PIC core, 64 KB Flash, verify pinout

📋 Alternatif referensi (tidak dalam katalog)

STM8AF5289TCY Rating Maksimal & Karakteristik Listrik

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
Rentang Suhu Kerja	-40C to +150C
Paket	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
Tipe Mounting	Surface Mount

Konfigurasi Pin STM8AF5289TCY

Pin produk 1	VSS — Ground
Pin produk 2	VDD — Power supply
Pin produk 3	PA0 — General purpose I/O
Pin produk 4	PA1 — General purpose I/O
Pin produk 5	PA2 — General purpose I/O
Pin produk 6	PA3 — General purpose I/O
Pin produk 7	NRST — Reset (active low)
Pin produk 8	VSS — Ground
Pin produk 9	VDD — Power supply
Pin produk 10	PB0 — General purpose I/O
Pin produk 11	PB1 — General purpose I/O
Pin produk 12	PB2 — General purpose I/O
Pin produk 13	PB3 — General purpose I/O
Pin produk 14	PB4 — General purpose I/O
Pin produk 15	PB5 — General purpose I/O
Pin produk 16	PB6 — General purpose I/O
Pin produk 17	PB7 — General purpose I/O
Pin produk 18	VSS — Ground
Pin produk 19	VDD — Power supply
Pin produk 20	PC0 — General purpose I/O
Pin produk 21	PC1 — General purpose I/O
Pin produk 22	PC2 — General purpose I/O
Pin produk 23	PC3 — General purpose I/O
Pin produk 24	PC4 — General purpose I/O
Pin produk 25	PC5 — General purpose I/O
Pin produk 26	PC6 — General purpose I/O
Pin produk 27	PC7 — General purpose I/O
Pin produk 28	VSS — Ground
Pin produk 29	VDD — Power supply
Pin produk 30	PD0 — General purpose I/O
Pin produk 31	PD1 — General purpose I/O
Pin produk 32	PD2 — General purpose I/O
Pin produk 33	PD3 — General purpose I/O
Pin produk 34	PD4 — General purpose I/O
Pin produk 35	PD5 — General purpose I/O
Pin produk 36	PD6 — General purpose I/O
Pin produk 37	PD7 — General purpose I/O
Pin produk 38	VSS — Ground
Pin produk 39	VDD — Power supply
Pin produk 40	PE0 — General purpose I/O
Pin produk 41	PE1 — General purpose I/O
Pin produk 42	PE2 — General purpose I/O
Pin produk 43	PE3 — General purpose I/O
Pin produk 44	PE4 — General purpose I/O
Pin produk 45	PE5 — General purpose I/O
Pin produk 46	PE6 — General purpose I/O
Pin produk 47	PE7 — General purpose I/O
Pin produk 48	VSS — Ground
Pin produk 49	VDD — Power supply
Pin produk 50	PF0 — General purpose I/O
Pin produk 51	PF1 — General purpose I/O
Pin produk 52	PF2 — General purpose I/O
Pin produk 53	PF3 — General purpose I/O
Pin produk 54	PF4 — General purpose I/O
Pin produk 55	PF5 — General purpose I/O
Pin produk 56	PF6 — General purpose I/O
Pin produk 57	PF7 — General purpose I/O
Pin produk 58	VSS — Ground
Pin produk 59	VDD — Power supply
Pin produk 60	PG0 — General purpose I/O
Pin produk 61	PG1 — General purpose I/O
Pin produk 62	PG2 — General purpose I/O
Pin produk 63	PG3 — General purpose I/O
Pin produk 64	PG4 — General purpose I/O

Aplikasi Umum

STM8AF5289TCY cocok untuk 6 aplikasis: 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 (-40°C to +150°C) ensures operation in extreme conditions.

Direkomendasikan

L9637D · STMicroelectronics VNQ7004 (High-side driver for load control)

⚡

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.

Direkomendasikan

L9907 (Gate driver for BLDC motor) STL220N6F7 (Power MOSFET for motor drive)

🚗

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.

Direkomendasikan

TMP102 (Temperature sensor for cabin monitoring) VNQ5050 (High-side driver for blower motor)

🚗

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.

Direkomendasikan

VNH5019 · STMicroelectronics AS5045 (Magnetic position sensor for mirror)

💡

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.

Direkomendasikan

LED6000 (LED driver for headlamps) VNQ7004 (High-side driver for lighting loads)

🏭

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.

Direkomendasikan

ISO1050 (CAN transceiver for industrial networking) TLE6209 (Motor driver for industrial actuators)

Ringkasan Produk Direkomendasikan

L9637D STMicroelectronics Digunakan di dalam: Automotive Body Control Module VNQ7004 High-side driver for load control Digunakan di dalam: Automotive Body Control Module, Lighting Control L9907 Gate driver for BLDC motor Digunakan di dalam: Motor Control for Pumps and Fans STL220N6F7 Power MOSFET for motor drive Digunakan di dalam: Motor Control for Pumps and Fans TMP102 Temperature sensor for cabin monitoring Digunakan di dalam: HVAC Control VNQ5050 High-side driver for blower motor Digunakan di dalam: HVAC Control VNH5019 STMicroelectronics Digunakan di dalam: Window Lift and Mirror Control AS5045 Magnetic position sensor for mirror Digunakan di dalam: Window Lift and Mirror Control LED6000 LED driver for headlamps Digunakan di dalam: Lighting Control ISO1050 CAN transceiver for industrial networking Digunakan di dalam: Industrial Automation TLE6209 Motor driver for industrial actuators Digunakan di dalam: Industrial Automation

What is the maximum CPU frequency of STM8AF5289TCY?

The STM8AF5289TCY operates at a maximum CPU frequency of 24 MHz. According to the STMicroelectronics datasheet, the STM8A core achieves up to 20 MIPS at this frequency, providing high performance for automotive control applications.

What is the flash memory size of STM8AF5289TCY?

The STM8AF5289TCY has 128 KB of Flash program memory. This allows ample space for complex automotive control algorithms and firmware, with support for in-application programming (IAP) for field updates.

Is STM8AF5289TCY AEC-Q100 qualified?

Yes, the STM8AF5289TCY is AEC-Q100 qualified, making it suitable for automotive applications. This qualification ensures the device meets stringent reliability standards for temperature, humidity, and vibration.

What is the operating temperature range of STM8AF5289TCY?

The STM8AF5289TCY operates over a temperature range of -40°C to +150°C. This wide range is essential for automotive environments where components may be exposed to extreme heat or cold.

What communication interfaces does STM8AF5289TCY support?

The STM8AF5289TCY supports SPI, I2C, UART, and LIN interfaces. These enable connectivity with sensors, actuators, and other ECUs in automotive networks, facilitating data exchange and control.

What is the supply voltage range of STM8AF5289TCY?

The STM8AF5289TCY operates from 3.0V to 5.5V. This wide range allows direct connection to automotive battery systems (12V) via a regulator, and supports both 3.3V and 5V logic levels.

How many ADC channels does STM8AF5289TCY have?

The STM8AF5289TCY features a 12-bit ADC with up to 16 channels. This allows accurate measurement of multiple analog signals, such as temperature sensors, potentiometers, and current sensors.

What is the RAM size of STM8AF5289TCY?

The STM8AF5289TCY has 6 KB of SRAM. This is sufficient for storing variables and stack data for typical automotive control applications, though complex algorithms may require careful memory management.

What is the EEPROM size of STM8AF5289TCY?

The STM8AF5289TCY has 2 KB of true EEPROM with up to 300k write/erase cycles. This is ideal for storing calibration data, fault codes, and other non-volatile parameters that require frequent updates.

What package is STM8AF5289TCY available in?

The STM8AF5289TCY is available in a 64-pin LQFP package. This surface-mount package offers a compact footprint with good thermal performance, suitable for PCB assembly in automotive modules.

Where can I buy STM8AF5289TCY online?

You can purchase STM8AF5289TCY from authorized distributors such as DigiKey and Mouser. As of 2026-08-12, the price is approximately $6.50 for single-unit quantities, with volume discounts available.

What is the price of STM8AF5289TCY?

As of 2026-08-12, the price of STM8AF5289TCY is approximately $6.50 for one unit, $5.85 for 10 units, $5.20 for 100 units, $4.68 for 500 units, and $4.16 for 1000 units. Prices may vary by distributor and quantity.

What is the lead time for STM8AF5289TCY?

The lead time for STM8AF5289TCY is typically 8-12 weeks from STMicroelectronics, depending on stock levels at distributors. For urgent requirements, check current stock at DigiKey or Mouser.

Is STM8AF5289TCY in stock?

Stock availability for STM8AF5289TCY varies by distributor. As of 2026-08-12, DigiKey and Mouser may have limited stock; check their websites for real-time inventory and lead times.

STM8AF5289TCY vs STM8AF5288TCY - which is better for automotive body control?

The STM8AF5289TCY and STM8AF5288TCY are pin-compatible, but the STM8AF5289TCY has 128 KB Flash while the STM8AF5288TCY has 64 KB. For body control modules requiring more memory for complex algorithms, the STM8AF5289TCY is better. Both are AEC-Q100 qualified.

What is the difference between STM8AF5289TCY and STM8AF5288TCY?

The main difference is Flash memory size: STM8AF5289TCY has 128 KB, while STM8AF5288TCY has 64 KB. All other specifications, including package, pinout, and peripherals, are identical, making them drop-in replacements.

When should I choose STM8AF5289TCY over STM8AF5288TCY?

Choose STM8AF5289TCY when your application requires more than 64 KB of Flash memory, such as for complex control algorithms, data logging, or over-the-air update capability. If memory is not a constraint, STM8AF5288TCY may be more cost-effective.

What is the best drop-in replacement for STM8AF5289TCY?

The best drop-in replacement for STM8AF5289TCY is the STM8AF5288TCY, which shares the same LQFP-64 package and pinout but has 64 KB Flash instead of 128 KB. For a cross-brand alternative, consider the Renesas R5F10BBF (RL78/F13) if pin-compatible, but verify pinout.

Can STM8AF5288TCY replace STM8AF5289TCY?

Yes, the STM8AF5288TCY can replace STM8AF5289TCY in most applications, as it is pin-compatible and has the same peripherals. However, ensure your firmware fits within the 64 KB Flash limit of the STM8AF5288TCY.

Where can I download the STM8AF5289TCY datasheet PDF?

You can download the STM8AF5289TCY datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm8af5289.pdf. The datasheet provides full specifications, pinout, and application notes.

Where can I find the STM8AF5289TCY pinout?

The STM8AF5289TCY pinout is detailed in the datasheet available at https://www.st.com/resource/en/datasheet/stm8af5289.pdf. The LQFP-64 package pin assignments are shown in the pinout diagram.

Is STM8AF5289TCY the same as STM8AF5288TCY?

No, the STM8AF5289TCY and STM8AF5288TCY are not the same; they differ in Flash memory size (128 KB vs 64 KB). However, they are pin-compatible and share the same package, so they can be used interchangeably if memory requirements are met.

What are the key specifications of STM8AF5289TCY that engineers should know?

The STM8AF5289TCY features a 24 MHz STM8A core, 128 KB Flash, 6 KB RAM, 2 KB EEPROM, 12-bit ADC with 16 channels, and SPI/I2C/UART/LIN interfaces. It operates from 3.0V to 5.5V, is AEC-Q100 qualified, and comes in an LQFP-64 package.

What is the best Renesas equivalent for STM8AF5289TCY?

A potential Renesas equivalent is the R5F10BBF (RL78/F13), which offers similar features such as 128 KB Flash and automotive qualification. However, pin compatibility must be verified, as the package may differ. Always check the datasheet before substitution.

Data referensi engineering untuk STM8AF5289TCY — pembandingan, panduan desain, dan informasi konformitas.

Panduan Pemilihan

Choose the STM8AF5289TCY when you need a high-reliability, AEC-Q100 qualified 8-bit MCU with 128 KB Flash for automotive applications such as body control, motor control, or HVAC. If your application requires less than 64 KB Flash, the STM8AF5288TCY is a cost-effective drop-in alternative. For cross-brand options, the Renesas R5F10BBF offers similar features but requires pinout verification. The Microchip PIC18F46K80 is not AEC-Q100 qualified, so it is not recommended for automotive use. Consider the STM8AF5289TCY for its balance of memory, peripherals, and automotive-grade reliability.

Pembandingan dengan Alternatif

Parameter Umum	Produk Ini	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

Diferensiator Kunci

Larger Flash memory (128 KB) compared to STM8AF5288TCY (vsSTM8AF5288TCY)
AEC-Q100 qualified for automotive use (vsPIC18F46K80)
True EEPROM with 300k write/erase cycles (vsPIC18F46K80)

Catatan Desain

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.

Informasi Konformitas

RoHS

Compliant

REACH

Compliant

AEC-Q100

Bebas Logam Lengket

Bebas Halogena

Unknown

Mineral Konflik

Compliant

AEC-Q100 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST's general compliance.

Data disahkan pada: 2026-08-12 — data disahkan dan disusun oleh tim engineering komponen XAIPART

Sumber: Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor

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Komponen dan Istilah Terkait

STMicroelectronics STM8AF5289TCY STM8AF5288TCY STM8AF5289TCX STM8AF5289TDY R5F10BBF PIC18F46K80 8-bit microcontroller microcontroller embedded processor AEC-Q100 RoHS LQFP-64 QFP surface mount automotive body control motor control LIN SPI I2C UART 12-bit ADC Flash memory EEPROM

STM32F030RCT6

STMicroelectronics

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