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T20-l431-som

azonenberg·misc-devboards·t20-l431-som/t20-l431-som.kicad_pcb

T20-l431-som PCB layout, top view — open source STM32 board by azonenberg

About the T20-l431-som PCB

T20-l431-som is an open source STM32 PCB design by azonenberg, published on GitHub under the BSD-3-Clause license. It is a 4-layer board measuring 10.1 × 12.2 mm, with 54 components from 14 distinct parts.

Its main chip is the STM32L431-WLCSP64, from the STM32 family. Other key parts include the T20W80, MX25U3232FBHI02, MODULE_INTERNAL_T20_L431_HOST, LP3986TL-2518/NOPB and 74LVC1T45_DSBGA_YZP. By type, the board carries 34 capacitors, 9 ICs, 9 resistors and 2 inductors.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

Miscellaneous prototype hardware that wasn't major enough to warrant a dedicated repo

Main components on the T20-l431-som

STM32L431-WLCSP64T20W80MX25U3232FBHI02MODULE_INTERNAL_T20_L431_HOSTLP3986TL-2518/NOPB74LVC1T45_DSBGA_YZPTPS22916BYFPRSIT8021AI-J4-XXS-16.000000NCP139AFCT120T2G

T20-l431-som bill of materials (BOM)

54 components, 14 distinct parts.

QtyPartRefs
1
STM32L431-WLCSP64
U1
1
T20W80
U2
1
MX25U3232FBHI02
MX25U3232F
U3
1
MODULE_INTERNAL_T20_L431_HOST
U4
1
LP3986TL-2518/NOPB
U5
1
74LVC1T45_DSBGA_YZP
U6
1
TPS22916BYFPR
U7
1
SIT8021AI-J4-XXS-16.000000
U8
1
NCP139AFCT120T2G
U9
2
MPZ0603S470CT000
L1, L2
30
GRM033C80J105ME05D
1 uF
C1, C2, C3, C4, C5, C6, C7, C8 +22
1
0.01 uF
C20
3
GRM035R60E475ME01D
4.7 uF 2.5V
C29, C30, C31
9
10K
R1, R2, R3, R4, R5, R6, R7, R8 +1

T20-l431-som design files

The KiCad project lives in the azonenberg/misc-devboards repository on GitHub; these links point at the commit this page was built from.

T20-l431-som: common questions

What microcontroller does the T20-l431-som use?

The T20-l431-som is built around the STM32L431-WLCSP64, from the STM32 family.

How big is the T20-l431-som PCB?

The T20-l431-som measures 10.1 × 12.2 mm, has 4 copper layers and is 0.8 mm thick.

How many components are on the T20-l431-som?

54 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the T20-l431-som design files?

From the azonenberg/misc-devboards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the T20-l431-som design in my own project?

Yes, under the terms of its BSD-3-Clause license, which azonenberg chose for the repository.

Can I test firmware for the T20-l431-som without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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