STMicroelectronics STM8AF6223IPCX

Overview

STM8AF6223IPCX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 8 Kbyte Flash memory, 640 byte data EEPROM, 10-bit ADC with 7 muxed channels, LIN 2.2-compliant UART, and operation up to 150 °C - deployed in engine control units for sensor signal acquisition and LIN bus communication.

For engineers reviewing the STM8AF6223IPCX datasheet, STM8AF6223IPCX pinout, STM8AF6223IPCX application, or STM8AF6223IPCX equivalent, key selection criteria include automotive temperature grade (–40 to 150 °C), LIN master/slave support with automatic resynchronization, high-sink I/O capability (21 pins), and dual RC oscillator trimming for clock stability in harsh environments.

Technical Context

The device implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in safety-critical automotive subsystems. Its clock system integrates user-trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators, plus external crystal/resonator support with clock security monitoring.

Interrupt handling uses a nested controller supporting 32 vectors and up to 28 external interrupts across 7 priority levels. Peripheral integration includes TIM1 (16-bit advanced timer with dead-time insertion), TIM5 (16-bit general-purpose), TIM6 (8-bit basic), and ADC1 with analog watchdog and scan mode - all accessible via configurable GPIO remapping.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-grade molding compound rated for 150 °C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AF6223IPCX, STM8AF6226M6X offers identical functionality in a smaller thermally enhanced package, while RL78/F13-CD provides greater processing headroom at the cost of reduced temperature resilience and external driver dependency.

Availability

STM8AF6223IPCX is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and electric power steering systems requiring stable component supply across extended automotive lifecycles.

Supply support for STM8AF6223IPCX 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 STM8AF series targets automotive body, powertrain, and chassis applications with AEC-Q100 qualification, extended temperature operation, and integrated LIN/ADC/timer peripherals to reduce system cost and board space.

FAQ

What is the maximum operating temperature and qualification standard for STM8AF6223IPCX?

The STM8AF6223IPCX is rated for continuous operation from –40 °C to +150 °C and is fully qualified to AEC-Q100 Grade 0 standards. This includes stress testing for temperature cycling, humidity bias, and high-temperature operating life - confirming suitability for under-hood engine control and transmission applications where ambient temperatures exceed 125 °C.

Does STM8AF6223IPCX include hardware LIN protocol support or require external transceivers?

STM8AF6223IPCX integrates a LINUART peripheral compliant with LIN 2.2 specification, supporting both master and slave modes with automatic resynchronization. It handles frame formatting, checksum calculation, and baud rate adaptation in hardware. However, an external LIN transceiver (e.g., TLE7259-3GE) is still required to drive the physical bus line and provide ESD protection and common-mode rejection.

How many high-sink I/O pins does STM8AF6223IPCX support, and what is their drive strength?

The device supports 21 high-sink output pins capable of sinking up to 20 mA each at VDD = 5 V, with guaranteed performance across the full –40 °C to +150 °C temperature range. These pins are distributed across PORTA, PORTB, PORTC, and PORTD and can be configured as general-purpose outputs or alternate-function signals such as TIM1/5 outputs or ADC triggers.

Is there on-chip EEPROM, and what are its endurance and retention specifications?

Yes, STM8AF6223IPCX includes 640 bytes of true embedded data EEPROM. It guarantees 300,000 write/erase cycles and 20 years of data retention at 55 °C after 1,000 cycles. The EEPROM supports byte-level read/write/erase operations and is protected by hardware write-protection bits and optional read-out protection (ROP) to prevent unauthorized access.