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STMicroelectronics STM32L442KCU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L442KCU6 STM32L4 ARM Cortex-M4 MCU, 80 MHz

MPNSTM32L442KCU6
Active

STMicroelectronics STM32L4 series, STM32L442KCU6, ARM Cortex-M4, 32-Bit Single-Core, 80MHz, 256KB Flash, 64K x 8 RAM, 1.71V ~ 3.6V, -40°C ~ 85°C, 32-UFQFN Exposed Pad.

$6.6700Ref. price · indicative, final on quote
Packaging32-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32L4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L442KCU6 specifications
ParameterValue
SeriesSTM32L4
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed80MHz
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART, USB
Number of i (O)26
Core processorARM® Cortex®-M4
Case32-UFQFN Exposed Pad
Data convertersA/D 10x12b; D/A 2x12b
Program memory size256KB (256K x 8)

Product details

The 80 MHz core clock with single-precision FPU gives this part enough headroom for sensor fusion, motor control loops, or audio processing without stepping up to a higher-power MCU family. The 26 I/O pins in the 32-pin package limit parallel peripheral expansion; if you need more than a couple of SPI or UART interfaces simultaneously, check the pin muxing early.

Connectivity and data converters

On the connectivity side, this MCU includes CANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART, and USB — a broad set for a 32-pin device. The USB peripheral supports device and OTG modes, which is often the deciding factor when choosing between this and a smaller STM32L0 part. The data converters are 10-channel 12-bit ADC and 2-channel 12-bit DAC, adequate for basic analog sensing and control but not high-resolution audio or precision measurement.

Rework and handling notes

The 32-UFQFN package with exposed pad is reworkable with hot air if you pre-bake the board per MSL requirements — the pad under the QFN acts as a heatsink, so a preheat from the bottom side helps avoid cold joints.

Frequently asked questions

What is the equivalent for STM32L442KCU6?

The STM32L151CBU6A is a pin-compatible alternative from the STM32L1 series, but it uses a Cortex-M3 core at 32 MHz and lacks USB and QSPI. It is not a functional equivalent if you need the 80 MHz clock or USB connectivity.