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STMicroelectronics STM32F038K6U6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F038K6U6 STM32 ARM Cortex-M0 MCU, 48 MHz, 32 KB Flash

MPNSTM32F038K6U6
Active

STMicroelectronics STM32F038K6U6, STM32F0 series, 32-bit ARM Cortex-M0 MCU, 48 MHz, 32 KB Flash, 4K x 8 RAM, 26 I/O, 1.65 V to 3.6 V, -40°C to 85°C, 32-UFQFPN (5x5 mm).

$1.6241Ref. price · indicative, final on quote
STMicroelectronics STM32F038K6U6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F038K6U6 specifications
ParameterValue
SeriesSTM32F0
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed48MHz
PackageTray
RAM size4K x 8
Core size32-Bit Single-Core
PeripheralsDMA, I²S, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)26
Core processorARM® Cortex®-M0
Case32-UFQFN Exposed Pad
Data convertersA/D 10x12b
Program memory size32KB (32K x 8)

Product details

Cortex-M0 at 48 MHz — what the clock and memory mean for the BOM

The 48 MHz core clock is the ceiling; the 32 KB Flash and 4K x 8 RAM size the part for a single control loop, a Modbus RTU node, or a sensor hub — not a GUI stack or a TCP/IP offload engine. The 10-channel 12-bit ADC provides enough analog front-end resolution for current sensing or battery voltage monitoring without an external converter.

Package and thermal — the 32-UFQFN exposed pad

The 32-UFQFN Exposed Pad package with the supplier device package 32-UFQFPN (5x5 mm) is a space-saver for compact PCBs.

Lifecycle — active, no last-time-buy pressure

ST continues manufacturing this SKU, so there is no LTB window to manage and no forced redesign for a replacement. For new designs the STM32F0 family remains a supported portfolio; the base product number STM32F038 is the reference for ordering variants with different temperature grades or packaging options.

Frequently asked questions

Is STM32F038K6U6 obsolete or still active?

The STM32F038K6U6 is Active. ST continues production; there is no discontinuation notice or last-time-buy schedule on this SKU.

What are the equivalents or alternatives to STM32F038K6U6?

Within the STM32F0 series, pin-compatible alternatives with larger Flash or RAM exist at the same 32-UFQFPN footprint — for example, the STM32F042K6U6 adds a USB device controller and 6 more I/O, while the STM32F031K6U6 is a lower-cost option with a reduced peripheral set. All share the same ARM Cortex-M0 core and supply range, so a board respin is not required to switch between them.

Is STM32F038K6U6 recommended for new designs?

Yes. The Active lifecycle status and continued STM32F0 family support mean there is no near-term risk of obsolescence. The 48 MHz Cortex-M0 core, 32 KB Flash, and wide supply range make it a fit for low-power sensor nodes, motor-control feedback, and LIN-bus slave modules that are still in the concept or prototype phase.