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STMicroelectronics STM8AF52A9TDY — Microcontrollers & Processors (MCU / MPU / DSP)

STM8AF52A9TDY 8-bit MCU, 24 MHz, AEC-Q100, 128 KB Flash

MPNSTM8AF52A9TDY
NRND

STMicroelectronics STM8A series, STM8AF52A9TDY, 8-Bit MCU, 24MHz, 128KB Flash, 6K x 8 RAM, 2K x 8 EEPROM, AEC-Q100, 64-LQFP, -40°C to 150°C.

$8.0500Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8AF52A9TDY specifications
ParameterValue
SeriesAutomotive, AEC-Q100, STM8A
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 5.5V
Operating temperature-40°C ~ 150°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 size128KB (128K x 8)

Product details

For a BOM line already qualified, the NRND flag signals that you should evaluate a migration path before a formal end-of-life notice appears.

24 MHz core — what it handles

At 24 MHz, this 8-bit core is sized for control loops in the tens-of-microseconds range — reading a sensor, updating a PWM duty cycle, or forwarding a CAN message. It is not a DSP or heavy-compute engine; the 6 KB RAM limits buffering for large data logs or complex protocol stacks. For a LIN slave node or a simple actuator controller, the speed and memory are well matched.

Frequently asked questions

Is STM8AF52A9TDY obsolete or active?

It is not yet obsolete, but STMicroelectronics recommends against using it in new designs. Existing production can continue, but a migration plan should be prepared.

What is the replacement for STM8AF52A9TDY?

For a pin-compatible alternative within the STM8A family, contact STMicroelectronics directly or evaluate the current STM8A product line for a drop-in or near-drop-in replacement with similar memory and peripheral mapping.

What is STM8AF52A9TDY's listed speed?

The core runs at 24 MHz, which is the maximum clock frequency for this 8-bit STM8A processor.

What is STM8AF52A9TDY's automotive qualification?

It is part of the Automotive, AEC-Q100 qualified STM8A series, rated for operation from -40°C to 150°C ambient.