STMicroelectronics STM8AF62AATCY

Overview

STM8AF62AATCY from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 128 Kbyte Flash program memory with 20-year data retention at 55 °C, 2 Kbyte true data EEPROM (300 kcycle endurance), and integrated CAN 2.0B interface operating up to 1 Mbit/s - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.

For engineers reviewing the STM8AF62AATCY datasheet, STM8AF62AATCY pinout, STM8AF62AATCY application, or STM8AF62AATCY equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed drop-in alternatives for ECU and body control module design.

Technical Context

The device implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, achieving 10 MIPS at 16 MHz. It integrates dual clock domains: a user-trimmable 16 MHz RC oscillator and a low-power 128 kHz RC oscillator, both monitored by a dedicated clock security system (CSS) with fail-safe reset.

Its peripheral set includes an advanced control timer (16-bit, 4 CAPCOM channels, dead-time insertion), two general-purpose 16-bit timers, a window watchdog, independent watchdog, and LINUART supporting LIN 2.2 master/slave with automatic resynchronization - all synchronized via configurable clock gating (CLK_PCKENR1/2).

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced for automotive under-hood operation; 64-pin layout supports full peripheral routing including CANH/CANL, multiple USART/LINUART channels, and 16-channel ADC input mapping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AF6269, the STM8AF62AATCY provides double Flash capacity for larger control algorithms and OTA update partitions; versus STM32F042F6P6, it delivers native CAN, AEC-Q100 Grade 0 qualification, and proven thermal robustness for under-hood deployment.

Availability

STM8AF62AATCY is available at Aetrix Electronics and suitable for engine control units, transmission control units, body control modules, and electric power steering systems requiring stable component supply across multi-year automotive production programs.

Supply support for STM8AF62AATCY 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.

This part belongs to the STM8AF automotive microcontroller product line, engineered specifically for ASIL-B capable powertrain and chassis applications demanding extended temperature operation, functional safety features, and long-term supply stability.

FAQ

What is the maximum operating junction temperature for STM8AF62AATCY?

The device is qualified for −40 °C to +150 °C junction temperature per AEC-Q100 Grade 0 requirements. Electrical characteristics in Table 24 and thermal resistance data in Table 54 confirm stable operation at 150 °C with appropriate PCB copper area and airflow; derating is not required within this range.

Does STM8AF62AATCY support in-system programming via SWIM?

Yes - the Single-Wire Interface Module (SWIM) enables full in-system programming and debugging using ST-LINK/V2 or compatible programmers. It supports Flash and EEPROM erase/write, register read/write, and real-time variable monitoring without halting CPU execution.

How many CAN message objects does the on-chip CAN controller support?

The beCAN peripheral supports 16 message objects with configurable acceptance filters and priority-based arbitration. Each object can be configured as transmit or receive buffer with programmable ID masking, enabling robust handling of up to 16 distinct CAN identifiers in ECU applications.

Is the 2 Kbyte data EEPROM accessible during program execution?

Yes - the true data EEPROM supports concurrent read-while-write operation. While a page (128 bytes) is being programmed, other pages remain readable and executable, enabling seamless logging of diagnostic data without interrupting control loop execution.