STMicroelectronics STM8AF62A6UCY

Overview

STM8AF62A6UCY 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 STM8AF62A6UCY datasheet, STM8AF62A6UCY pinout, STM8AF62A6UCY application, or STM8AF62A6UCY equivalent, key selection criteria include automotive-grade temperature range (−40 °C to 150 °C), on-chip LINUART compliance with automatic resynchronization, 10-bit ADC with 2 LSB TUE and up to 16 multiplexed channels, and dual 16-bit general-purpose timers with CAPCOM functionality.

Technical Context

The device implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, enabling 10 MIPS at 16 MHz. It integrates a clock security system (CSS) with dedicated clock monitor and supports multiple low-power modes (Wait, Auto-wakeup, Halt) with user-definable clock gating.

Peripheral integration includes a high-speed CAN 2.0B controller, LINUART compliant with LIN 2.2 (master/slave + auto-resync), USART with synchronous clock output, SPI up to 10 Mbit/s, I²C up to 400 Kbit/s, and a 16-channel 10-bit ADC with 2 LSB total unadjusted error and 1 LSB linearity.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced for sustained operation at 150 °C ambient in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AF62A6UCY, STM8AF6269UCY trades Flash capacity and CAN for cost reduction in LIN-centric designs, while RL78/F13 offers alternative ecosystem support but lacks Grade 0 thermal qualification - making STM8AF62A6UCY the only option meeting full AEC-Q100 Grade 0 + CAN + 128 KB Flash requirements.

Availability

STM8AF62A6UCY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and body control modules requiring stable component supply across extended automotive lifecycles.

Supply support for STM8AF62A6UCY 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.

The STM8A automotive MCU product line targets cost-sensitive, high-reliability applications in powertrain, chassis, and body electronics - emphasizing AEC-Q100 qualification, extended temperature operation, and integrated communication peripherals to reduce system-level BOM count.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for STM8AF62A6UCY?

The STM8AF62A6UCY achieves a maximum CPU frequency of 24 MHz at VDD = 4.5–5.5 V. At lower supply voltages, the maximum fCPU is reduced: 16 MHz at 3.0–5.5 V, and operation below 3.0 V is not supported. This relationship is defined in Figure 11 of the datasheet and verified across temperature ranges from −40 °C to +150 °C.

Does STM8AF62A6UCY support debug programming via SWIM interface, and what hardware is required?

Yes, STM8AF62A6UCY supports single-wire interface module (SWIM) debugging and programming using the ST-LINK/V2 or ST-LINK/V2-ISOL isolator. Only two connections are needed: SWIM (pin 11 on LQFP64) and GND. No external crystal or bootloader is required, enabling in-circuit flash programming and real-time variable inspection during development.

How is the CAN interface electrically isolated from the MCU core, and what transceiver compatibility is specified?

The CAN controller is integrated into the MCU die with differential TX/RX signals routed to PB1 (CAN_TX) and PB0 (CAN_RX). It requires an external ISO 11898-2 compliant CAN transceiver (e.g., TJA1042, SN65HVD230) for physical layer interfacing. The MCU provides dominant/recessive bit timing and error frame handling in hardware, but isolation must be implemented externally via transformer or capacitive coupling per automotive EMC requirements.

What is the guaranteed data retention period for the on-chip EEPROM, and under what conditions is it specified?

The 2 Kbyte on-chip data EEPROM guarantees 20 years of data retention at 55 °C ambient temperature, as validated per JEDEC JESD22-A117 stress testing. Retention time decreases logarithmically with increasing temperature: at 125 °C, retention is specified for ≥1 year; at 150 °C, it is characterized for ≥500 hours. Endurance remains 300 kcycles across the full operating temperature range.