STMicroelectronics STM8AF62A8TCY

Overview

STM8AF62A8TCY 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. It supports LIN 2.2-compliant communication, 10-bit ADC with 16 multiplexed channels, and operates across -40 °C to 150 °C for engine control unit (ECU) and body electronics applications.

For engineers reviewing the STM8AF62A8TCY datasheet, STM8AF62A8TCY pinout, STM8AF62A8TCY application, or STM8AF62A8TCY equivalent, key selection criteria include automotive-grade temperature range (-40 °C to 150 °C), CAN/LIN coexistence capability, on-chip data EEPROM endurance, Flash retention under thermal stress, and support for high-reliability power management in safety-critical subsystems.

Technical Context

The STM8AF62A8TCY 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 and low-power 128 kHz LSI oscillators, plus external crystal support up to 24 MHz with clock security monitoring.

Peripheral integration includes a CAN 2.0B controller with dedicated message RAM and filtering, LINUART supporting master/slave modes with automatic resynchronization, and dual 16-bit general-purpose timers with CAPCOM channels-enabling precise PWM generation and capture for motor control timing loops.

Key Specifications

Pinout & Package

LQFP64 package: 64-pin, 10 × 10 mm low-profile quad flat package with exposed thermal pad; RoHS-compliant, moisture sensitivity level (MSL) 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive 8-bit microcontroller applications.

Compared with STM8AF62A8TCY, STM8AF6269TCY offers identical peripheral set and qualification but reduced Flash capacity, while RL78/F13 trades integrated CAN and Grade 0 thermal rating for lower unit cost in less demanding environments.

Availability

STM8AF62A8TCY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.

Supply support for STM8AF62A8TCY 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 management ICs, sensors, and automotive-grade silicon for industrial and transportation markets.

The STM8A automotive MCU product line targets cost-sensitive, high-reliability embedded control applications-including powertrain, chassis, and body electronics-where AEC-Q100 qualification, extended temperature operation, and integrated communication peripherals are mandatory.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for STM8AF62A8TCY?

The STM8AF62A8TCY achieves a maximum CPU frequency of 24 MHz at VDD = 5.0 V. Operation at 16 MHz is guaranteed across the full 3.0–5.5 V supply range, while 24 MHz requires VDD ≥ 4.5 V per electrical characteristics Table 24. This voltage-frequency dependency ensures timing margin for critical control loops under battery voltage sag conditions.

Does STM8AF62A8TCY support both CAN and LIN simultaneously on the same device?

Yes. The STM8AF62A8TCY integrates a dedicated CAN 2.0B controller (beCAN) and a LINUART peripheral that operates independently. Both interfaces can be active concurrently-e.g., CAN for powertrain messaging and LIN for actuator control-without resource conflict, as confirmed in Section 5.9 of the datasheet.

How is the 2 Kbyte data EEPROM endurance validated, and what write cycle management is required?

The 2 Kbyte data EEPROM is specified for 300,000 write/erase cycles per memory location, verified per JEDEC JESD22-A117. No external wear-leveling firmware is required; the embedded EEPROM controller handles address rotation automatically. However, users must observe minimum 5 ms delay between write operations to meet timing specifications in Table 37.

What debug interface does STM8AF62A8TCY use, and is JTAG supported?

The STM8AF62A8TCY uses the Single Wire Interface Module (SWIM) for debugging and programming, accessible via the PD7 pin. JTAG is not supported; SWIM provides full in-circuit debugging, flash programming, and memory inspection with only one dedicated pin, reducing PCB routing complexity versus traditional JTAG implementations.