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STMicroelectronics STM32L451CCU3TR — Microcontrollers & Processors (MCU / MPU / DSP)
STMicroelectronics

STM32L451CCU3TR ARM Cortex-M4 MCU, 80 MHz, 256 KB Flash

MPNSTM32L451CCU3TR
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STMicroelectronics STM32L4 series, ARM Cortex-M4 32-bit MCU, 80 MHz, 256 KB Flash, 160 KB SRAM, 38 I/O, CANbus/I²C/SPI/UART, 1.71V-3.6V, -40°C to 125°C, 48-UFQFN exposed pad.

$3.7854Ref. price · indicative, final on quote
STM32L451CCU3TR datasheet
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Specifications

STM32L451CCU3TR Technical Specifications
ParameterValue
SeriesSTM32L4
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 125°C (TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size160K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, UART/USART
Number of i (O)38
Core processorARM® Cortex®-M4
Case48-UFQFN Exposed Pad
Data convertersA/D 10x12b; D/A 1x12b
Program memory size256KB (256K x 8)

Product details

256 KB Flash and 160 KB SRAM — sizing the firmware budget

The STM32L451CCU3TR: The 256 KB Flash and 160 KB SRAM support moderate firmware and data buffers.

Connectivity and analog — what is on the peripheral bus

The MCU includes CANbus, I²C, SPI, UART/USART, QSPI, and SAI interfaces, plus a 12-bit ADC with 10 channels and a 12-bit DAC. The QSPI interface can map an external Flash or RAM into the memory space, useful for data logging or code shadowing. The brown-out detect and watchdog peripherals are standard for safety-conscious designs.

Package and footprint — 48-UFQFN with exposed pad

Housed in a 48-UFQFN exposed-pad package (7x7 mm), this MCU is a surface-mount device with 38 I/O lines.

Frequently asked questions

Is STM32L451CCU3TR compatible with STM32L452?

The STM32L452 is a higher-density sibling in the same STM32L4 family, typically offering more Flash or SRAM. The two are pin-compatible across the 48-pin UFQFPN package option, so a board designed for the L451 can accept the L452 with a firmware change. Verify the exact memory and peripheral differences in the datasheet before substituting.