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STMicroelectronics STM32L452REI6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L452REI6 STM32L4 32-bit ARM Cortex-M4 MCU, 80 MHz

MPNSTM32L452REI6
Active

STMicroelectronics STM32L4 series, ARM® Cortex®-M4, 32-Bit Single-Core, 80MHz, 512KB (512K x 8) FLASH, 160K x 8 RAM, 64-UFBGA, -40°C ~ 85°C (TA).

$8.1700Ref. price · indicative, final on quote
STMicroelectronics STM32L452REI6 datasheet (PDF)
Packaging64-UFBGA
RoHSROHS3 Compliant
SeriesSTM32L4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L452REI6 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 size160K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, UART/USART, USB
Number of i (O)52
Core processorARM® Cortex®-M4
Case64-UFBGA
Data convertersA/D 16x12b; D/A 1x12b
Program memory size512KB (512K x 8)

Product details

The STM32L452REI6: The peripheral set includes CANbus, I²C, SPI, UART/USART, USB, QSPI, SAI, and MMC/SD interfaces.

52 I/O and 64-UFBGA footprint — layout implications

With 52 general-purpose I/O brought out to a 64-ball UFBGA on 0.5 mm pitch, this package demands a PCB with micro-via capability or at least a 4-layer stack-up to route the inner balls. The 5x5 mm body saves board area compared to an LQFP64, but the assembly house needs experience with fine-pitch BGA reflow.

It is ROHS3 compliant and available through independent distribution channels.

Frequently asked questions

How does STM32L452REI6 compare to the STM32L151CBU6A?

The STM32L151CBU6A is an older Cortex-M3 part from the STM32L1 series running at 32 MHz with 37 I/O and no FPU. The STM32L452REI6 offers double the core speed at 80 MHz, a Cortex-M4 with FPU, 52 I/O, and more memory — 512 KB Flash vs the 's smaller Flash — in a 64-UFBGA package. The is a cost-optimized alternative for simpler battery-powered tasks where the M4's DSP and FPU are not needed.

Is STM32L452REI6 suitable for low power IoT applications?

Yes, the STM32L4 series is designed for ultra-low-power operation. The 1.71 V minimum supply voltage supports direct battery connection, and the Cortex-M4 with FPU can run sensor fusion or edge ML workloads while the core is clocked at 80 MHz. The 160 KB SRAM leaves room for protocol stacks without external RAM.