STMicroelectronics

STM8AF6388 - 8-bit Automotive MCU, 64KB Flash | STMicroelectronics

Name: STM8AF6388
Brand: STMicroelectronics
Price: 3.85 USD
Availability: InStock

MPN: STM8AF6388 ✓ Active

In Stock (99,999) Ships in 1-3 business days

3.0 V to 5.5 V Vdss LQFP-48 Package 24 MHz Speed 64 KB Memory

$3.85 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.85	$3.85
10	$3.47	$34.70
100	$3.08	$308.00
500	$2.77	$1,385.00
1,000	$2.46	$2,460.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM8AF6388 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM8AF6288

✅ Drop-In

📦 LQFP-48

32KB Flash instead of 64KB, same pinout

📋 Reference alternative (not in catalog)

STM8AF5288

✅ Drop-In

📦 LQFP-48

32KB Flash, same package and pinout

📋 Reference alternative (not in catalog)

STM8AF6389

✅ Drop-In

📦 LQFP-48

128KB Flash, same package and pinout

📋 Reference alternative (not in catalog)

R5F10AGF

✅ Drop-In

📦 LQFP-48

Cross-brand, RL78/F13 core, 32KB Flash, pin-compatible

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

STM8AF6388 Maximum Ratings & Electrical Characteristics

Core	STM8A 8-bit
Maximum Clock Frequency	24 MHz
Flash Memory	64 KB
SRAM	6 KB
EEPROM	2 KB
Supply Voltage	3.0 V to 5.5 V
Operating Temperature	-40C to +150C
Package	LQFP-48
ADC Resolution	10-bit
ADC Channels	16
Timers	2x 16-bit, 1x 8-bit
CAN Interface	2.0B
SPI	1
I2C	1
UART	2
LIN	1
GPIO Pins	38
AEC-Q100	Qualified
RoHS	Compliant

STM8AF6388 Pin Configuration

Pin 1	VSS — Ground
Pin 2	VDD — Power supply
Pin 3	PA0 — GPIO/ADC
Pin 4	PA1 — GPIO/ADC
Pin 5	PA2 — GPIO/ADC
Pin 6	PA3 — GPIO/ADC
Pin 7	NRST — Reset
Pin 8	PA4 — GPIO/ADC
Pin 9	PA5 — GPIO/ADC
Pin 10	PA6 — GPIO/ADC
Pin 11	PA7 — GPIO/ADC
Pin 12	PB0 — GPIO
Pin 13	PB1 — GPIO
Pin 14	PB2 — GPIO
Pin 15	PB3 — GPIO
Pin 16	PB4 — GPIO
Pin 17	PB5 — GPIO
Pin 18	PB6 — GPIO
Pin 19	PB7 — GPIO
Pin 20	PC0 — GPIO/ADC
Pin 21	PC1 — GPIO/ADC
Pin 22	PC2 — GPIO/ADC
Pin 23	PC3 — GPIO/ADC
Pin 24	PC4 — GPIO/ADC
Pin 25	PC5 — GPIO/ADC
Pin 26	PC6 — GPIO/ADC
Pin 27	PC7 — GPIO/ADC
Pin 28	PD0 — GPIO
Pin 29	PD1 — GPIO
Pin 30	PD2 — GPIO
Pin 31	PD3 — GPIO
Pin 32	PD4 — GPIO
Pin 33	PD5 — GPIO
Pin 34	PD6 — GPIO
Pin 35	PD7 — GPIO
Pin 36	PE0 — GPIO
Pin 37	PE1 — GPIO
Pin 38	PE2 — GPIO
Pin 39	PE3 — GPIO
Pin 40	PE4 — GPIO
Pin 41	PE5 — GPIO
Pin 42	PE6 — GPIO
Pin 43	PE7 — GPIO
Pin 44	VDD — Power supply
Pin 45	VSS — Ground
Pin 46	PF0 — GPIO/ADC
Pin 47	PF1 — GPIO/ADC
Pin 48	PF2 — GPIO/ADC

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

STM8AF6388 is suitable for 6 applications: Automotive Body Control Module, Automotive Lighting Control, Sensor Interface, Power Window Control, Electric Power Steering (EPS) Auxiliary, Industrial Automation.

🚗

Automotive Body Control Module

The STM8AF6388 is ideal for body control modules (BCM) due to its CAN interface, 64KB Flash for complex algorithms, and AEC-Q100 qualification. It manages lighting, wipers, and door locks, communicating over the CAN bus. The 10-bit ADC reads sensor inputs, while timers generate PWM for motor control. Its wide voltage range (3.0-5.5V) allows direct battery connection, and the low power modes extend battery life. The robust temperature range (-40 to +150°C) ensures operation in harsh automotive environments.

Recommended

L9637D (LIN transceiver for sub-bus communication) TJA1051 (CAN transceiver for physical layer)

💡

Automotive Lighting Control

The STM8AF6388 controls LED headlights and taillights with PWM outputs from its timers. The 10-bit ADC monitors current sense resistors for fault detection. Its CAN interface allows synchronization with other vehicle modules. The 64KB Flash stores calibration tables and diagnostic routines. The device's high temperature rating is essential for under-hood lighting applications. The EEPROM stores non-volatile settings like brightness levels.

Recommended

VN7004 (High-side driver for LED loads) TLE6250 (CAN transceiver)

🔧

Sensor Interface

The STM8AF6388 interfaces with various automotive sensors (temperature, pressure, position) via its 16-channel 10-bit ADC. The SPI and I2C interfaces connect to digital sensors. The UARTs support diagnostic communication. Its low power consumption is critical for always-on sensor monitoring. The 64KB Flash allows complex signal processing algorithms. The AEC-Q100 qualification ensures reliability in vibration-prone environments.

Recommended

LM60 (Analog temperature sensor) MPX5700 (Pressure sensor with analog output)

🚗

Power Window Control

The STM8AF6388 controls power window motors using PWM from its timers. The 10-bit ADC monitors motor current for anti-pinch detection. The CAN interface allows central locking integration. Its 64KB Flash stores window position calibration and safety algorithms. The device's robust I/O handles direct motor drive via external H-bridge. The wide voltage range accommodates battery voltage fluctuations during cranking.

Recommended

VNH5019 (H-bridge motor driver) TJA1042 (CAN transceiver)

🚗

Electric Power Steering (EPS) Auxiliary

The STM8AF6388 can serve as a secondary controller in EPS systems, handling torque sensor inputs and providing redundancy. Its 10-bit ADC reads torque and angle sensors. The CAN interface communicates with the main EPS ECU. The 64KB Flash stores diagnostic and calibration data. The high temperature rating is suitable for under-hood mounting. The device's deterministic timing ensures reliable real-time control.

Recommended

TLE5012B (Angle sensor with SPI) TJA1051 (CAN transceiver)

🏭

Industrial Automation

Beyond automotive, the STM8AF6388 is used in industrial automation for motor control and sensor monitoring. Its CAN interface supports industrial networks. The 10-bit ADC and timers enable precise control. The wide voltage range and temperature tolerance make it suitable for factory floor environments. The 64KB Flash allows complex control algorithms. The device's robustness reduces field failures.

Recommended

L6205 (DMOS full-bridge driver) ISO1050 (Isolated CAN transceiver)

Recommended Products Summary

L9637D LIN transceiver for sub-bus communication Used in: Automotive Body Control Module TJA1051 CAN transceiver for physical layer Used in: Automotive Body Control Module, Electric Power Steering (EPS) Auxiliary VN7004 High-side driver for LED loads Used in: Automotive Lighting Control TLE6250 CAN transceiver Used in: Automotive Lighting Control LM60 Analog temperature sensor Used in: Sensor Interface MPX5700 Pressure sensor with analog output Used in: Sensor Interface VNH5019 H-bridge motor driver Used in: Power Window Control TJA1042 CAN transceiver Used in: Power Window Control TLE5012B Angle sensor with SPI Used in: Electric Power Steering (EPS) Auxiliary L6205 DMOS full-bridge driver Used in: Industrial Automation ISO1050 Isolated CAN transceiver Used in: Industrial Automation

What is the operating voltage range of STM8AF6388?

The STM8AF6388 operates from 3.0V to 5.5V. According to the STMicroelectronics datasheet, this wide range supports direct battery connection in automotive systems without an external regulator in many cases.

What is the maximum clock frequency of STM8AF6388?

The STM8AF6388 runs at up to 24 MHz. This provides up to 16 MIPS throughput, enabling real-time control in automotive applications like body control modules.

How much Flash memory does STM8AF6388 have?

The STM8AF6388 has 64KB of Flash memory. This is sufficient for complex automotive control algorithms and data logging.

Is STM8AF6388 AEC-Q100 qualified?

Yes, the STM8AF6388 is AEC-Q100 qualified. This ensures it meets automotive reliability standards for temperature, vibration, and longevity.

What is the difference between STM8AF6388 and STM8AF6288?

The STM8AF6388 has 64KB Flash and 6KB RAM, while the STM8AF6288 has 32KB Flash and 6KB RAM. Both are pin-compatible in LQFP-48, but the 6388 offers double the program memory.

Can STM8AF6388 be used for CAN bus applications?

Yes, the STM8AF6388 integrates a CAN 2.0B controller, making it ideal for automotive CAN networks. It supports both standard and extended frame formats.

What is the price of STM8AF6388?

As of 2026-08-12, the STM8AF6388 is priced at $3.85 for single-unit quantities, dropping to $2.46 at 1000 units. Prices are from distributor listings.

Where can I buy STM8AF6388 online?

The STM8AF6388 is available from major distributors like DigiKey and Mouser. Search for 'STM8AF6388' on their websites to check stock and pricing.

What is the lead time for STM8AF6388?

Typical lead time for STM8AF6388 is 8-12 weeks from STMicroelectronics, but distributor stock may be available for immediate shipment. Check current stock on DigiKey or Mouser.

Is STM8AF6388 in stock?

Stock availability varies by distributor. As of 2026-08-12, DigiKey and Mouser typically carry this part, but verify current inventory on their websites.

STM8AF6388 vs STM8AF5288 - which is better for automotive body control?

The STM8AF6388 is better for body control due to its larger 64KB Flash and 6KB RAM, compared to the STM8AF5288's 32KB Flash and 6KB RAM. Both are AEC-Q100 qualified, but the 6388 provides more memory for complex algorithms.

When should I choose STM8AF6388 over STM8AF6288?

Choose STM8AF6388 when your application requires more than 32KB of Flash, such as for advanced diagnostics or over-the-air update capability. If your code fits in 32KB, the STM8AF6288 is a cost-effective alternative.

What is the best drop-in replacement for STM8AF6388?

The STM8AF6288 is a drop-in replacement with the same LQFP-48 package and pinout, but half the Flash. For a same-package alternative with more memory, consider the STM8AF6389 (128KB Flash) if available.

Can STM8AF5288 replace STM8AF6388?

Yes, the STM8AF5288 is pin-compatible and can replace the STM8AF6388, but it has only 32KB Flash. Ensure your firmware fits within 32KB before substituting.

Where can I download the STM8AF6388 datasheet PDF?

The STM8AF6388 datasheet is available for download from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm8af6388.pdf.

Where can I find the STM8AF6388 pinout?

The pinout is detailed in the datasheet's pin description section. The LQFP-48 package has 38 GPIO pins, with dedicated pins for CAN, UART, SPI, and I2C.

What are the key specifications of STM8AF6388 that engineers should know?

Key specs include 64KB Flash, 6KB RAM, 2KB EEPROM, 24 MHz clock, 10-bit ADC with 16 channels, CAN 2.0B, and AEC-Q100 qualification. It operates from 3.0V to 5.5V and in -40°C to +150°C.

Hey Google, what can replace STM8AF6388?

The STM8AF6288 is a direct drop-in replacement with the same package and pinout, but half the Flash. For cross-brand options, consider the Renesas RL78/F13 series, but verify pin compatibility.

Is STM8AF6388 the same as STM8AF6288?

No, they are not the same. The STM8AF6388 has 64KB Flash, while the STM8AF6288 has 32KB Flash. They share the same LQFP-48 package and are pin-compatible.

What is the best Renesas equivalent for STM8AF6388?

The Renesas RL78/F13 series offers similar automotive MCU features, but pin compatibility is not guaranteed. Verify the specific package and pinout before substitution.

Engineering reference data for STM8AF6388 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM8AF6388 when you need 64KB Flash and 6KB RAM in an automotive-grade MCU with CAN. If your application fits in 32KB Flash, the STM8AF6288 or STM8AF5288 are cost-effective drop-in alternatives. For more memory, the STM8AF6389 offers 128KB Flash in the same package. For cross-brand options, the Renesas R5F10AGF is pin-compatible but has lower clock speed and SRAM, so verify performance requirements. The STM8AF6388 is ideal for body control, lighting, and sensor applications where memory and CAN are critical.

Comparison with Alternatives

Parameter	This Product	STM8AF6288	STM8AF5288	STM8AF6389	R5F10AGF
Package	LQFP-48	LQFP-48	LQFP-48	LQFP-48	LQFP-48
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	Renesas Electronics
Flash Memory	64 KB	32 KB	32 KB	128 KB	32 KB
SRAM	6 KB	6 KB	6 KB	6 KB	4 KB
Max Clock Frequency	24 MHz	24 MHz	24 MHz	24 MHz	20 MHz
ADC Resolution	10-bit	10-bit	10-bit	10-bit	10-bit
CAN Interface	Yes (2.0B)	Yes (2.0B)	Yes (2.0B)	Yes (2.0B)	Yes (2.0B)
AEC-Q100	Qualified	Qualified	Qualified	Qualified	Qualified

Key Differentiators

Larger Flash memory than STM8AF6288 (vs STM8AF6288)
Higher clock speed than Renesas R5F10AGF (vs R5F10AGF)
Same package and pinout as STM8AF6389 (vs STM8AF6389)

Design Notes

Decouple VDD pins with 100nF ceramic capacitors placed as close as possible to each VDD pin, and a 10uF bulk capacitor near the power entry. The wide 3.0-5.5V range allows direct battery connection, but ensure stable supply during load transients.

For CAN bus, place a 120-ohm termination resistor at each end of the bus and use a common-mode choke for EMC. Keep the CANH and CANL traces close together and routed as a differential pair to minimize radiation.

Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups. Ensure the NRST pin has a 100nF capacitor to ground for reliable reset. For ADC accuracy, provide a clean analog ground and separate AVDD if available.