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STMicroelectronics STM32F042K6U6TR — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F042K6U6TR STM32F0 MCU, 48 MHz, 32 KB Flash, 32-UFQFPN

MPNSTM32F042K6U6TR
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STMicroelectronics STM32F0 series ARM Cortex-M0 32-bit MCU, STM32F042K6U6TR, 48 MHz, 32 KB Flash, 6 KB RAM, USB + CAN, 26 GPIO, 13x12-bit ADC, 32-UFQFPN 5x5 mm, -40°C to 85°C.

$3.6000Ref. price · indicative, final on quote
STMicroelectronics STM32F042K6U6TR datasheet (PDF)
Packaging32-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32F0
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F042K6U6TR 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
PackageTape & Reel (TR) Cut Tape (CT)
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-UFQFN Exposed Pad
Data convertersA/D 13x12b
Program memory size32KB (32K x 8)

Product details

Compact Cortex-M0 for USB and CAN nodes

The STM32F042K6U6TR: It packs 32 KB of flash and 6 KB of SRAM in a 32-UFQFPN 5x5 mm package — enough for a USB-connected sensor hub or a CAN node in a compact enclosure. With USB 2.0, CANbus, and multiple SPI/I²C/UART interfaces, this MCU bridges field buses and local peripherals without an external transceiver for the USB PHY. The 26 GPIOs in a 32-pin package leave room for a few discrete I/O alongside the serial interfaces.

Memory and peripheral budget for a control loop

32 KB of flash and 6 KB of RAM suit a single control loop with a modest protocol stack — a CANopen node with a few analog inputs and PWM outputs fits within this footprint. The 13-channel 12-bit ADC reads sensors directly; DMA moves the samples to RAM without CPU intervention. Industrial temperature grade (-40°C to 85°C) covers most factory-floor and outdoor equipment.

Active lifecycle and sourcing posture

The tape-and-reel packaging (TR suffix) matches automated pick-and-place assembly.

Frequently asked questions

What is the closest functional alternative to STM32F042K6U6TR?

The STM32L151CBU6A is a higher-end peer in the STM32L1 series with a Cortex-M3 core running at 32 MHz, 37 I/O, and dual 12-bit DACs. The two are not pin-compatible — the STM32L151 uses a different package and pinout, so a board spin is required to swap between them.