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Linecard

azonenberg·latentred·pcb/linecard/linecard.kicad_pcb

Linecard PCB layout, top view — open source STM32 board by azonenberg
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About the Linecard PCB

Linecard is an open source STM32 PCB design by azonenberg, published on GitHub under the BSD-3-Clause license. It is a 6-layer board measuring 185 × 93 mm, with 611 components from 55 distinct parts.

Its main chip is the STM32L431-QFN48, from the STM32 family. Other key parts include the MYMGK00504ERSR, INA230, VSC8512, ESD224DQAR and SIT9121AC-2B2-33E125.000000. By type, the board carries 392 capacitors, 101 resistors, 64 ICs, 21 test points, 14 connectors and 10 inductors.

From the project

Open hardware 48x 1000baseT + 2x 25G SFP28 Ethernet switch

Input: 12V at 1.25A max, fused at 3A to be conservative.

Expect ~15W max power consumption, less under typical operation

v0.1: right LED on the RJ45 is swapped between upper and lower ports

VDD (1.0V): 1.15A per PHY, 2.3A total VDDA (1.0V): 180 mA per PHY, 360 mA total VDDAH (2.5V): 1.37A per PHY, 2.74A total VDDAL (1.0V): 190 mA per PHY, 380 total VDDIO (2.5V): 60 mA per PHY, 120 mA total VDDVS (1.0V): 90 mA per PHY, 180 mA total Plus a 3.3V standby rail for the management MCU

Main components on the Linecard

MYMGK00504ERSRSTM32L431-QFN48INA230VSC8512ESD224DQARSIT9121AC-2B2-33E125.000000AT30TS74_UDFN

Linecard bill of materials (BOM)

611 components, 55 distinct parts.

QtyPartRefs
4
MYMGK00504ERSR
U1, U2, U3, U4
1
STM32L431-QFN48
U5
4
INA230
U6, U7, U8, U9
2
VSC8512
U10, U35
48
ESD224DQAR
U11, U12, U13, U14, U15, U16, U17, U18 +40
2
SIT9121AC-2B2-33E125.000000
U60, U61
3
AT30TS74_UDFN
U62, U63, U64
1
LONGTHING
M1
2
960-27-12-D-AB-0
M12, M13
1
CONN_ATX12V
J1
3
LPJT476156AENL
J2, J5, J9
1
CORTEX_DEBUG_ETM
J3
1
0532611071
J4
2
XILINX_JTAG
J6, J13
4
SMPM
J7, J8, J11, J12
2
ARF6-08-S-D-A-K-TR
J10, J14
1
3A
F1
2
SWITCH
SW1, SW2
2
GROUNDCLIP
TP1, TP2
3
CONN_01X03
TP5, TP6, TP22
Show 35 more
QtyPartRefs
13
U.FL
TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14 +5
3
TESTPOINT
TP16, TP23, TP24
2
GREEN
D1, D2
1
RED
D3
1
MI0603J601R-10
FB1
1
BLM31KN271SN1L
FB2
8
HI1206N101R-10
L1, L2, L3, L4, L5, L6, L7, L8
7
22 uF 25V
C1, C2, C6, C7, C12, C16, C17
8
220 uF
C3, C4, C8, C9, C13, C14, C18, C19
4
DNP
C5, C10, C15, C20
1
22 uF 25VC
C11
283
0.47 uF
C21, C24, C25, C26, C27, C28, C29, C30 +275
33
4.7 uF
C22, C36, C39, C65, C71, C80, C85, C87 +25
29
0.1 uF
C23, C453, C454, C455, C456, C457, C458, C459 +21
8
47 uF
C33, C78, C153, C159, C250, C277, C278, C295
2
330 uF
C56, C257
8
22 uF
C61, C63, C76, C146, C244, C246, C256, C262
2
22 uF
C143, C253
6
1 uF
C241, C242, C243, C467, C468, C469
1
DNP
C488
1
2.7K
R1
49
470
R2, R31, R32, R33, R34, R35, R36, R37 +41
4
LVK25R005FER
R3, R7, R12, R16
6
0
R4, R8, R11, R15, R28, R29
9
10K
R5, R9, R17, R27, R61, R62, R94, R95 +1
2
4.99K
R6, R10
1
2K
R13
1
220
R14
3
DNP
R18, R60, R93
3
4.7K
R19, R20, R26
10
1K
R21, R22, R23, R59, R64, R65, R66, R67 +2
2
33K
R24, R25
2
33
R30, R99
2
620 1%
R55, R63
6
2K 1%
R56, R57, R58, R96, R97, R98

Linecard design files

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

Linecard: common questions

What microcontroller does the Linecard use?

The Linecard is built around the STM32L431-QFN48, from the STM32 family.

How big is the Linecard PCB?

The Linecard measures 185 × 93 mm, has 6 copper layers and is 1.599994 mm thick.

How many components are on the Linecard?

611 components, from 55 distinct parts. The full bill of materials is listed on this page.

Where can I download the Linecard design files?

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

Can I use the Linecard 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 Linecard 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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