2 layers121.9 × 88.9 mm
4 layers36 × 36 mm
28x28
greyltc/hardwareHardware disign files, for use with the KiCAD EDA
- Size
- 36 × 36 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 58
- Pads
- 146
- Tracks, vias
- 370, 80
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20170123)
- Created
- 20 Oct 2016
- Updated
- 13 Mar 2022
Overview
28x28 is an open-source printed circuit board by greyltc, from the greyltc/hardware repository on GitHub. It is a 4-layer board of 36 × 36 mm with 22 parts on 58 nets, routed with 370 tracks and 80 vias.
It is built around the PCF8574T and MAX14662ETI+. Its parts include 12 connectors, 6 resistors and 3 ICs. It belongs with the power boards of this library.
Main components
2
PCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O Expanders
MAX14662ETI+
TQFN-28-EP(4x4)-40℃~+85℃ 1.6V~5.5V 1:1 400MHz 425mΩ 5.5us 5.5us 80ns TQFN-28-EP(4x4) Analog Switches, Multiplexers ROHSMaxim Integrated (Analog Devices)Analog Switches, Multiplexers
README
README.mdhardware
Hardware disign files, for use with the KiCAD EDA
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | CONN_01X02 | myparts:812-22-002-30-007101 | P39, P40, P41, P42, P43, P44, P45, P46 |
| 6 | R | Resistors_SMD:R_0402 | R1, R2, R3, R4, R5, R6 |
| 2 | CONN_01X09 | myparts:TSM-109-01-T-SV | P47, P50 |
| 2 | MAX14662 | Housings_DFN_QFN:QFN-28-1EP_4x4mm_Pitch0.4mm | U1, U2 |
| 1 | CONN_01X10 | myparts:TSM-110-01-T-SV | P48 |
| 1 | CONN_01X10 | myparts:TSM-110-01-T-SV-INV | P49 |
| 1 | PCF8574 | SMD_Packages:SO-16-W | U3 |
| 1 | value | myparts:logo_small | G*** |
Questions
How big is the 28x28 PCB?
It measures 36 × 36 mm and has 4 copper layers, 1.6 mm thick.
What parts does the 28x28 use?
22 parts, built around the PCF8574T and MAX14662ETI+. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 28x28 KiCad files?
From the greyltc/hardware repository on GitHub, at the commit this page was made from: the board is KiCAD/muxAdapter/28x28.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 28x28 design in my own project?
Its repository states no licence, so its author keeps all rights: ask greyltc before reusing the design.
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