
Pcb custom
sorjente/custom-pcb
This is an attempt to build a minimal, custom PCB featuring an STM32L4 MCU, using (ideally only) open source tools. It will hopefully serve as a stepping stone to build more complex embedded systems.
STMicroelectronicsExtended
-40℃~+85℃ 1.71V~3.6V 12bit 12bit 160KB 32 Bit 38 512KB 80MHz ARM Cortex-M4 Built-in FLASH QFN-48-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHS
The STM32L452CEU6 is a microcontroller made by STMicroelectronics in a QFN-48-EP(7x7) package with 49 pins. -40℃~+85℃ 1.71V~3.6V 12bit 12bit 160KB 32 Bit 38 512KB 80MHz ARM Cortex-M4 Built-in FLASH QFN-48-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHS.
PCBKit's library has its KiCad symbol (MCU_ST_STM32L4:STM32L452CEUx, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm, from KiCad's library), ready for a KiCad board. 136 are in stock at JLCPCB (part C222355). 2 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | VBAT | Power in |
| 2 | PC13 | Input/output |
| 3 | PC14 | Input/output |
| 4 | PC15 | Input/output |
| 5 | PH0 | Input/output |
| 6 | PH1 | Input/output |
| 7 | NRST | Input |
| 8 | VSSA | Power in |
| 9 | VDDA | Power in |
| 10 | PA0 | Input/output |
| 11 | PA1 | Input/output |
| 12 | PA2 | Input/output |
| 13 | PA3 | Input/output |
| 14 | PA4 | Input/output |
| 15 | PA5 | Input/output |
| 16 | PA6 | Input/output |
| 17 | PA7 | Input/output |
| 18 | PB0 | Input/output |
| 19 | PB1 | Input/output |
| 20 | PB2 | Input/output |
| 21 | PB10 | Input/output |
| 22 | PB11 | Input/output |
| 23 | VSS | Power in |
| 24 | VDD | Power in |
| 25 | PB12 | Input/output |
| 26 | PB13 | Input/output |
| 27 | PB14 | Input/output |
| 28 | PB15 | Input/output |
| 29 | PA8 | Input/output |
| 30 | PA9 | Input/output |
| 31 | PA10 | Input/output |
| 32 | PA11 | Input/output |
| 33 | PA12 | Input/output |
| 34 | PA13 | Input/output |
| 35 | VSS | Passive |
| 36 | VDDUSB | Power in |
| 37 | PA14 | Input/output |
| 38 | PA15 | Input/output |
| 39 | PB3 | Input/output |
| 40 | PB4 | Input/output |
| 41 | PB5 | Input/output |
| 42 | PB6 | Input/output |
| 43 | PB7 | Input/output |
| 44 | PH3 | Input/output |
| 45 | PB8 | Input/output |
| 46 | PB9 | Input/output |
| 47 | VSS | Passive |
| 48 | VDD | Power in |
| 49 | VSS | Passive |

sorjente/custom-pcb
This is an attempt to build a minimal, custom PCB featuring an STM32L4 MCU, using (ideally only) open source tools. It will hopefully serve as a stepping stone to build more complex embedded systems.

stellarcorp/tvsc
Core software repository for the Tennessee Valley Stellar Corporation
Yes. The symbol is MCU_ST_STM32L4:STM32L452CEUx and the footprint Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
QFN-48-EP(7x7), with 49 pins. Its footprint is drawn on this page.
STMicroelectronics publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C222355, with 136 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the STM32G431CBU6 by STMicroelectronics, the STM32F401CCU6 by STMicroelectronics, the STM32F411CCU6 by STMicroelectronics and the STM32F411CEU6 by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.