STMicroelectronics STM8AF5288TCX

Overview

STM8AF5288TCX 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 STM8AF5288TCX datasheet, STM8AF5288TCX pinout, STM8AF5288TCX application, or STM8AF5288TCX equivalent, key selection criteria include automotive-grade temperature range (–40 °C to 150 °C), LIN 2.2-compliant UART with automatic resynchronization, 10-bit ADC with 2 LSB total unadjusted error, and dual 16-bit general-purpose timers with CAPCOM channels for motor phase timing control.

Technical Context

The STM8AF5288TCX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, enabling 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI RC oscillator, 128 kHz LSI RC oscillator, and external crystal support up to 24 MHz with clock security monitoring.

Peripheral integration includes a dedicated beCAN controller supporting CAN 2.0B protocol, LINUART with master/slave modes and hardware resync, and advanced control timer with 3 complementary outputs and dead-time insertion - all synchronized via flexible peripheral clock gating (CLK_PCKENR1/2 registers).

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with 64 pins; thermally enhanced for sustained operation at 150 °C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AF6288TCX, the STM8AF5288TCX adds essential CAN 2.0B for powertrain networking while maintaining identical LIN and ADC capabilities; versus STM32F072RBT6, it offers lower BOM cost and smaller code footprint for legacy 8-bit firmware, but lacks USB and has less RAM for complex state machines.

Availability

STM8AF5288TCX 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 temperature ranges and long product lifecycles.

Supply support for STM8AF5288TCX 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 product line targets cost-sensitive, high-reliability automotive applications including powertrain, chassis, and body electronics - emphasizing AEC-Q100 qualification, extended temperature operation, and functional safety readiness (ISO 26262 ASIL-B capable).

FAQ

What is the maximum operating temperature specification for STM8AF5288TCX?

The STM8AF5288TCX is qualified for continuous operation from –40 °C to +150 °C ambient temperature per AEC-Q100 Grade 0 standards. This rating applies to the full LQFP64 package variant and is validated across all electrical parameters including Flash write/erase endurance, ADC accuracy, and CAN timing margins.

Does STM8AF5288TCX support in-circuit debugging without halting CPU execution?

Yes - the device features SWIM (Single Wire Interface Module), a dedicated single-pin debug interface that enables full-speed programming, real-time register inspection, and variable monitoring without stopping the CPU. SWIM operates independently of the main clock domain and remains active in all low-power modes except Halt with SWIM disabled.

How many CAN message objects does the integrated beCAN controller support?

The beCAN controller supports 16 message objects (mailboxes) with programmable acceptance filtering, priority arbitration, and automatic retransmission. Each mailbox can be configured for transmit or receive, with dedicated status flags and interrupt vectors for efficient handling of up to 16 concurrent CAN identifiers.

Is the 2 Kbyte data EEPROM accessible during Flash programming operations?

Yes - the true data EEPROM is fully independent of Flash memory and remains readable and writable during Flash program/erase cycles. It uses separate erase/write controllers and voltage pumps, allowing simultaneous background EEPROM updates while executing application code from Flash.