STMicroelectronics STM8AF6269TAY

Overview

STM8AF6269TAY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit MCU featuring a 24 MHz STM8A core, 64 Kbyte Flash program memory, 2 Kbyte data EEPROM, 10-bit ADC with 16-channel multiplexing, and integrated CAN 2.0B (1 Mbit/s), LIN 2.2, USART, SPI, and I²C interfaces. It operates from 3 to 5.5 V across –40 °C to 150 °C and targets engine control units, body electronics, and battery management systems.

For engineers reviewing the STM8AF6269TAY datasheet, STM8AF6269TAY pinout, STM8AF6269TAY application, or STM8AF6269TAY equivalent, key selection criteria include automotive-grade temperature range (–40 °C to 150 °C), CAN/LIN dual-protocol support, on-chip data EEPROM endurance (300 kcycles), Flash retention (20 years at 55 °C), and high-sink I/O capability (11 pins).

Technical Context

The STM8AF6269TAY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI, 128 kHz LSI, and external crystal oscillator with clock security monitoring.

Peripheral integration includes a dedicated beCAN controller compliant with ISO 11898-1, LINUART supporting master/slave auto-resynchronization, and an advanced control timer with dead-time insertion and 3 complementary outputs - all optimized for deterministic real-time automotive timing control.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, automotive-qualified surface-mount footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Compared with STM8AF6286TAY, the STM8AF6269TAY trades Flash capacity for lower unit cost and smaller die area, while retaining identical peripheral sets and qualification - making it ideal for cost-sensitive, memory-constrained automotive nodes. Versus MC9S12G128MLH, it delivers native LIN 2.2 and on-chip EEPROM, reducing external components and validation effort.

Availability

STM8AF6269TAY is available at Aetrix Electronics and suitable for engine control units, body control modules, and battery management systems requiring stable component supply across extended automotive temperature ranges and long production lifecycles.

Supply support for STM8AF6269TAY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STM8A automotive MCU product line targets cost-effective, high-reliability embedded control in harsh environments - emphasizing AEC-Q100 qualification, on-chip nonvolatile memory, and integrated communication peripherals for vehicle networking.

FAQ

What is the maximum operating frequency of the STM8AF6269TAY and under what conditions?

The STM8AF6269TAY achieves a maximum CPU frequency of 24 MHz when powered at VDD ≥ 4.5 V and operating within its qualified temperature range (–40 °C to +150 °C). At lower supply voltages (e.g., 3.3 V), the maximum fCPU is reduced to 16 MHz per the device's electrical characteristics table. This frequency scaling ensures timing compliance for CAN bit arbitration and LIN baud generation across voltage and temperature extremes.

Does the STM8AF6269TAY include hardware support for LIN 2.2, and how is it implemented?

Yes, the STM8AF6269TAY integrates a LINUART peripheral fully compliant with LIN 2.2 specification. It supports both master and slave modes with automatic resynchronization, break detection, sync field generation, and identifier handling - all implemented in hardware without CPU intervention. The LIN signal is routed to a single GPIO pin (e.g., PD2), requiring only an external LIN transceiver (e.g., TLE7259-2G) for bus-level compliance.

How does the on-chip data EEPROM differ from standard Flash memory in terms of endurance and usage?

The STM8AF6269TAY's 2 Kbyte data EEPROM is architecturally separate from program Flash and rated for 300,000 write/erase cycles with guaranteed data retention of 20 years at 55 °C. Unlike Flash, which requires page erasure before reprogramming, EEPROM allows byte-level writes - enabling direct storage of frequently updated parameters (e.g., odometer, calibration offsets) without wear-leveling software overhead or external memory.

What thermal management features are provided for operation at 150 °C ambient?

The STM8AF6269TAY's LQFP64 package includes an exposed thermal pad designed for solder attachment to a PCB copper pour, enabling efficient heat dissipation. Electrical specifications - including supply current, ADC accuracy, and timing parameters - are fully characterized from –40 °C to +150 °C. The internal temperature sensor and thermal shutdown circuitry (via dedicated interrupt) provide additional system-level thermal monitoring capability.