STM8AF6268TCY Tech Specifications
STMicroelectronics - STM8AF6268TCY technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM8AF6268TCY

Product Attribute	Attribute Value
Part Number	STM8AF6268TCY
Package	48-LQFP
Description	48-LQFP
Stock Condition	Get 13290 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	STMicroelectronics
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

STM8AF6268TCY

Manufacturer

stmicroelectronics

Introduction

The STM8AF6268TCY is a high-performance, low-power 8-bit microcontroller from STMicroelectronics. It is part of the STM8A series, designed for a wide range of embedded applications, including automotive, industrial, and consumer electronics.

Product Features and Performance

24MHz core speed

32KB of flash program memory

1KB of EEPROM

2KB of RAM

Variety of peripherals including I2C, LIN bus, SPI, UART/USART, PWM, and watchdog timer

10-bit, 10-channel ADC

Internal oscillator

Operating temperature range of -40°C to 125°C

Product Advantages

High performance and low power consumption

Extensive peripheral set for versatile applications

Automotive-grade qualification (AEC-Q100)

Robust design for harsh environments

Key Reasons to Choose This Product

Reliable and cost-effective solution for a wide range of embedded applications

Automotive-grade qualification ensures suitability for demanding environments

Comprehensive peripheral set and flexible configuration options

Quality and Safety Features

Automotive-grade qualification (AEC-Q100)

Brown-out detection and power-on reset for reliable operation

Watchdog timer for system integrity

Compatibility

Part of the STM8A series, compatible with other STM8A microcontrollers

Application Areas

Automotive electronics

Industrial automation and control

Consumer electronics

Home appliances

Product Lifecycle

This product is not recommended for new designs. There may be equivalent or alternative models available. Customers should contact our website's sales team for more information.

Frequently Asked Questions(FAQ)

What are the key differences between the STM8AF6268TCY and other STM8A series microcontrollers in terms of memory architecture and peripheral integration for automotive-grade applications?: The STM8AF6268TCY distinguishes itself within the STM8A family through its 32KB flash memory and 1KB EEPROM configuration, offering a balanced mix of program storage and non-volatile data retention. Compared to lower-density variants like the STM8AF5269, it provides sufficient code space for complex control algorithms without requiring external memory, while maintaining the same 38 I/O pins and integrated peripherals such as LINbus, SPI, and UART/USART interfaces. This makes it particularly suitable for mid-complexity automotive systems where cost efficiency and reliability are paramount.

How does the STM8AF6268TCY handle voltage fluctuations in automotive environments, and what protection mechanisms are embedded to ensure system stability during cold cranking or load dump events?: The STM8AF6268TCY operates across a wide supply range of 3V to 5.5V, which accommodates typical automotive battery voltage variations from 7V down to 4.5V under harsh conditions. It includes built-in Brown-out Reset (BOR) and Power-on Reset (POR) circuits that trigger at predefined thresholds to prevent erratic behavior during voltage transients. These features, combined with AEC-Q100 qualification, ensure robust operation during cold starts or load dump scenarios common in vehicle electrical systems.

Can the STM8AF6268TCY be used in safety-critical automotive subsystems, and how does its oscillator design impact timing accuracy compared to external crystal-based alternatives?: While not certified for functional safety per ISO 26262, the STM8AF6268TCY is qualified under AEC-Q100 Grade 1 (-40°C to +125°C), making it viable for non-safety-related but high-reliability automotive applications such as lighting controls or HVAC modules. Its internal RC oscillator runs at up to 24MHz with typical accuracy of ±1–2% over temperature, which may require calibration in precision timing loops. For applications demanding tighter timing margins, an external crystal oscillator can be implemented, though this increases board complexity and cost.

What is the trade-off between power consumption and performance when selecting the STM8AF6268TCY for battery-operated automotive accessories, and how does its sleep mode compare to active operation?: The STM8AF6268TCY draws approximately 30 µA in STOP mode with RTC enabled, dropping to under 1 µA when all clocks are disabled—ideal for infrequently sampled sensors in vehicles. In RUN mode at 24MHz, it consumes around 1.5 mA/MHz. While this is higher than ultra-low-power Cortex-M0+ MCUs, it offers significantly better real-time responsiveness than most 8-bit alternatives. For applications requiring sub-100 µA average current over hours-long intervals, periodic wake-up via low-power timers and optimized interrupt handling must be employed.

How does the pin count and LQFP package of the STM8AF6268TCY affect PCB layout decisions versus smaller-footprint alternatives like TSSOP or QFN packages?: The 48-pin LQFP package provides ample I/O access (38 usable pins) with good thermal dissipation and ease of soldering, especially for prototyping and low-volume production. However, compared to 32-pin QFN packages, it consumes more board space and may increase layer count if signal integrity is a concern. Engineers must weigh mechanical robustness against density requirements; LQFP simplifies rework but limits miniaturization compared to leadless packages, making it a compromise choice for automotive-grade designs balancing reliability and manufacturability.

Is the STM8AF6268TCY compatible with legacy software development tools, and how does its instruction set support legacy codebases compared to modern ARM-based platforms?: Yes, the STM8AF6268TCY fully supports legacy STM8 toolchains such as Cosmic C and STVD, enabling reuse of existing firmware with minimal porting effort. Its CISC instruction set includes efficient bit manipulation and register operations that map well to older embedded workflows. However, developers targeting newer ecosystems (e.g., FreeRTOS on ARM) will face steeper learning curves due to architectural differences, including lack of hardware FPU and limited stack-based exception handling compared to 32-bit cores.

What considerations apply when interfacing the STM8AF6268TCY’s 10-bit ADC with analog sensors in noisy automotive environments, and how can noise resilience be improved?: With only one 10-bit successive approximation ADC supporting 10 channels, the STM8AF6268TCY requires careful sensor routing and filtering to mitigate EMI from ignition coils or DC-DC converters. To enhance accuracy, use hardware averaging (if supported by firmware), implement guard traces, and employ RC low-pass filters before signal conditioning. Additionally, sample during stable phases of PWM cycles and avoid shared ground paths with high-current loads to maintain conversion integrity below ±2 LSB under typical automotive EMC conditions.

How does the STM8AF6268TCY’s watchdog timer implementation differ from windowed watchdogs found in more advanced MCUs, and what are best practices for reliable reset management?: The STM8AF6268TCY uses a standard independent watchdog (IWDG) that resets the MCU if not refreshed periodically, unlike windowed variants that restrict refresh timing windows. Best practice involves initializing the IWDG early in startup, using short refresh intervals (~1/3 of max period), and ensuring critical tasks execute within predictable timeframes. Avoid disabling the watchdog except during known safe states, and never disable it entirely in production code to prevent runaway conditions from going undetected.

What role does the STM8AF6268TCY play in over-the-air (OTA) update strategies for connected car accessories, given its limited flash size?: Due to only 32KB flash, the STM8AF6268TCY is unsuitable for full OTA firmware updates unless paired with a host processor managing delta patches. It can serve as a co-processor for secure boot verification or sensor aggregation, offloading simple tasks from main ECUs. Any update mechanism must include rollback capabilities and verify signature integrity before writing to protected sectors, leveraging the embedded cryptographic libraries available in some STM8AF variants—though the STM8AF6268TCY lacks native AES hardware acceleration.

How does the Moisture Sensitivity Level (MSL) rating of 3 for the STM8AF6268TCY influence storage and handling procedures in automotive manufacturing lines?: As an MSL 3 device with a 168-hour floor life after opening dry pack, the STM8AF6268TCY must be stored in controlled humidity environments (<60% RH) and reflowed within 7 days post-opening to prevent solder joint defects. Automotive assembly facilities typically follow IPC/JEDEC standards, requiring baking if shelf life exceeds thresholds. Proper handling ensures reliability during wave or reflow soldering, avoiding popcorning effects in high-humidity climates common in global supply chains.

What are the implications of using the STM8AF6268TCY in dual-voltage automotive systems (e.g., 12V/24V trucks), and how does its voltage tolerance compare to 5V-only MCUs?: The STM8AF6268TCY’s 3V–5.5V operating range covers both 12V and 24V nominal systems when used with appropriate step-down regulators, unlike 5V-only parts that risk damage near battery voltages. This flexibility allows direct interface with legacy truck harnesses without additional level-shifting circuitry. However, designers must ensure input pins do not exceed Vdd + 0.3V even briefly, necessitating transient suppression diodes or clamping networks on GPIO lines exposed to unregulated loads.

How does the absence of DMA in the STM8AF6268TCY affect data throughput in high-speed communication interfaces like SPI running at 10 MHz?: Without DMA, the STM8AF6268TCY relies on CPU-driven transfers for SPI transactions, limiting sustained throughput to roughly 1–2 MB/s depending on interrupt latency. At 10 MHz clock rates, this creates noticeable overhead, especially during bulk reads/writes. Optimizations include using FIFO buffers in software, minimizing ISR duration, and aligning data accesses to byte boundaries. For continuous high-speed streaming, consider reducing SPI speed or offloading protocol handling to dedicated peripherals—but expect higher CPU utilization compared to DMA-capable architectures.

What certification status does the STM8AF6268TCY hold for automotive OEMs, and how does AEC-Q100 compliance impact supplier selection criteria?: The STM8AF6268TCY meets AEC-Q100 Grade 1 qualification, indicating it has passed rigorous stress tests including temperature cycling, mechanical shock, and ESD validation. This satisfies Tier-1 supplier requirements for many automotive programs, though individual OEMs may impose additional reliability screens or process capability assessments. Compliance reduces audit burden and enhances traceability, making it a credible choice for body electronics, door modules, or interior lighting systems where long-term field reliability outweighs peak performance needs.

How does the STM8AF6268TCY’s lack of hardware CRC support impact message validation in CAN or LIN implementations compared to more recent microcontrollers?: Developers must implement CRC calculation in firmware for LIN frames or custom protocols, increasing CPU load and introducing potential bugs if lookup tables or polynomial logic are misimplemented. While acceptable for low-data-rate LIN buses (<10 kbps), this adds complexity versus hardware-assisted CRC units found in newer MCUs. For the STM8AF6268TCY, precomputed CRC tables and optimized assembly routines are recommended to maintain timing predictability and minimize jitter in time-sensitive automotive networks.

What are the long-term availability risks associated with the STM8AF6268TCY in light of STMicroelectronics’ product lifecycle strategy for legacy 8-bit MCUs?: STMicroelectronics continues to support STM8 products with extended life cycles, often exceeding 10 years for automotive-qualified variants like the STM8AF6268TCY. However, end-of-life notices may still occur if demand declines, and alternative sourcing channels might carry obsolescence risks. Engineers should monitor ST’s official roadmap and consider migration paths to STM32 families if future scalability or feature expansion becomes necessary beyond current application scope.

How does the EEPROM endurance specification for the STM8AF6268TCY influence wear-leveling strategies in logging applications, and what is the expected lifetime for typical write frequencies?: The STM8AF6268TCY’s 1KB EEPROM typically guarantees 100,000 write cycles per location, limiting direct logging without wear-leveling algorithms. For event logging at 10 writes per hour, this yields ~27 years of endurance—adequate for most applications. However, frequent writes (e.g., >1 Hz) require dynamic block rotation or buffering in RAM followed by batch writes to extend lifespan. Implementing simple round-robin indexing across multiple sectors prevents premature failure and ensures data persistence across power cycles.

What design constraints arise from the STM8AF6268TCY’s single-wire debugging interface (SWIM), and how does this impact development workflow compared to JTAG or cJTAG options?: SWIM shares a pin with GPIO (typically PC5), reducing available I/O during debugging and requiring physical disconnection for certain signals. Debug sessions also consume extra power and may interfere with real-time operation if interrupts conflict with debugger polling. While sufficient for basic development, complex debugging (e.g., breakpoints in tight loops) benefits from reduced overhead. Production programming remains possible via SWIM, but engineers must plan pin usage carefully to avoid conflicts in final PCB layouts.

How does the STM8AF6268TCY perform in high-temperature automotive environments above 100°C, and what derating practices should be applied to ensure reliable operation?: Rated up to 125°C, the STM8AF6268TCY maintains functionality in engine bay or exhaust-proximity applications, though clock accuracy degrades slightly with temperature drift in the internal oscillator. Flash programming times may increase at elevated temperatures, requiring longer erase/write cycles. Derating practices include lowering clock frequency during programming, avoiding rapid state changes in power modes, and verifying BOR thresholds under worst-case thermal conditions. Always validate timing margins empirically during environmental stress testing.

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Customer Reviews

Evaluation: 10 Articles

Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
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STM8AF6268TCY

STMicroelectronics
41D-STM8AF6268TCY

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Please refer to the English Version as our Official Version.Return

STM8AF6268TCY - STMicroelectronics

Specifications

Parts Introduction

Manufacturer Part Number

Manufacturer

Introduction

Product Features and Performance

Product Advantages

Key Reasons to Choose This Product

Quality and Safety Features

Compatibility

Application Areas

Product Lifecycle

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

Solid diode for power rectification. Works well in switching circuits.

Compact FPGA with good performance. Suitable for basic signal processing tasks.

Reliable I/O expander. Works well in embedded control applications.

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

Write a Review

Shipment

Delivery Time

Delivery Cost

Delivery Method

QC (Quality Warranty)

Payment Support

Packaging

Electrostatic Discharge Protection and Handling

Certifications & Memberships

STM8AF6268TCY

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Compare List (0 Items)

Feedback

Please refer to the English Version as our Official Version.