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STMicroelectronics STM32F042K4T6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F042K4T6 ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash

MPNSTM32F042K4T6
Active

STMicroelectronics STM32F042K4T6, STM32F0 series, 32-bit ARM Cortex-M0 MCU, 48 MHz, 16 KB Flash, 6K x 8 SRAM, USB 2.0, CAN 2.0B, 26 I/O, -40 to 85°C, 32-LQFP (7x7 mm), Tray.

$3.6700Ref. price · indicative, final on quote
Packaging32-LQFP
RoHSROHS3 Compliant
SeriesSTM32F0
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F042K4T6 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 size6K x 8
Core size32-Bit Single-Core
PeripheralsDMA, I²S, POR, PWM, WDT
ConnectivityCANbus, HDMI-CEC, I²C, IrDA, LINbus, SPI, UART/USART, USB
Number of i (O)26
Core processorARM® Cortex®-M0
Case32-LQFP
Data convertersA/D 13x12b
Program memory size16KB (16K x 8)

Product details

What this 48 MHz Cortex-M0 MCU brings to a BOM line

It targets cost-sensitive control applications where USB device or CAN connectivity is needed without the overhead of a larger part.

16 KB Flash — sizing the firmware budget

There is no room for a full RTOS with TCP/IP stack; the firmware team should budget tightly and plan for OTA updates only if the application fits in the remaining sector after the bootloader. The 6 KB SRAM is enough for a few packet buffers and modest state machines, but not for frame buffers or large data arrays.

Connectivity and peripherals — USB, CAN, and serial interfaces on a 32-pin package

The 26 I/O pins in the 32-LQFP package leave enough headroom for a handful of sensors, an LED bank, or a small keypad alongside the communication lines.

Active lifecycle — no LTB concern for production planning

This means it remains suitable for new design-ins and production ramps without supply-risk from discontinuation.

Package and footprint — 32-LQFP hand-solderable

The 32-LQFP package with a 7x7 mm body and 0.8 mm pitch is a standard quad flat pack that reflows easily and can be hand-soldered for prototyping or rework. No BGA reball or X-ray inspection is needed.

Frequently asked questions

What is the difference between STM32F042K4T6 and STM32F042K6T6?

The STM32F042K6T6 doubles the Flash memory to 32 KB and the SRAM to 6 KB (same SRAM as the K4). Both share the same 48 MHz Cortex-M0 core, 32-LQFP package, and peripheral set. The K6 is the drop-in upgrade for firmware that exceeds 16 KB.