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STMicroelectronics STM8AF5289TCY — Microcontrollers & Processors (MCU / MPU / DSP)

STM8AF5289TCY 8-bit MCU, 24 MHz, 64 KB Flash, AEC-Q100

MPNSTM8AF5289TCY
NRND

STMicroelectronics STM8A series, STM8AF5289TCY, 8-bit MCU, 24 MHz, 64 KB Flash, 6K x 8 RAM, 2K x 8 EEPROM, 52 I/O, CANbus, LINbus, SPI, I²C, UART/USART, A/D 16x10b, -40°C to 125°C, 64-LQFP.

$7.0400Ref. price · indicative, final on quote
STMicroelectronics STM8AF5289TCY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8AF5289TCY specifications
ParameterValue
SeriesAutomotive, AEC-Q100, STM8A
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 5.5V
Operating temperature-40°C~125°C(TA)
Speed24MHz
PackageTray
RAM size6K x 8
Core size8-Bit
EEPROM size2K x 8
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, I²C, LINbus, SPI, UART/USART
Number of i (O)52
Core processorSTM8A
Case64-LQFP
Data convertersA/D 16x10b
Program memory size64KB (64K x 8)

Product details

Automotive 8-bit MCU with AEC-Q100 grade

The peripheral set includes CANbus, LINbus, SPI, I²C, and UART/USART interfaces, plus a 16-channel 10-bit ADC, making it suited for body controllers, sensor fusion nodes, and actuator drivers in passenger vehicles and commercial trucks.

NRND — plan the last-time buy

This means STMicroelectronics has flagged it for eventual discontinuation; new production programs should not select this part. For existing BOM lines, procurement should confirm the last-time-buy window and secure sufficient inventory for the remaining production run.

Brown-out detect and POR are integrated, so the MCU resets cleanly during cranking events.

64 KB Flash and 2K EEPROM — firmware and calibration storage

The 64 KB Flash is sized for moderate automotive control firmware — enough for a CANopen stack, sensor calibration, and diagnostic routines. The separate 2K x 8 EEPROM holds calibration tables and fault codes without wearing the Flash. With 52 I/O lines in a 64-LQFP package, the part can interface to multiple sensors, switches, and actuators while leaving headroom for future feature additions.

Frequently asked questions

Is STM8AF5289TCY AEC-Q100 qualified?

Yes, the STM8AF5289TCY is part of the Automotive, AEC-Q100 series, qualified for automotive-grade applications including under-hood and chassis-domain ECUs.

What are the alternatives for STM8AF5289TCY?

No official pin-compatible replacement is listed in the available documentation. For new designs, consider the active STM8A series variants with similar Flash and peripheral sets; verify pin compatibility against the 64-LQFP footprint before committing the BOM.

What is STM8AF5289TCY's listed speed?

The core runs at 24 MHz, which is the maximum clock frequency for this 8-bit STM8A core. At this speed, the Flash requires zero wait states for single-cycle instruction fetch.