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IO-expander-MCP23017-breakout hardware design

SolderedElectronics·IO-expander-MCP23017-breakout-hardware-design·CAD/V1.2.1/GPIO_Expander_MCP23017.kicad_pcb

IO-expander-MCP23017-breakout hardware design layout, top view — open source board by SolderedElectronics

About the IO-expander-MCP23017-breakout hardware design

IO-expander-MCP23017-breakout hardware design is an open source PCB design by SolderedElectronics, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 22 × 38 mm, with 29 components from 15 distinct parts.

Other key parts include the MCP23017T-E_SS, NMOS-DUAL and SE5218. By type, the board carries 8 resistors, 7 jumpers, 7 relays, 3 ICs and 2 capacitors.

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

From the project

Hardware design, BOM, gerbers and 3D files for IO-expander-MCP23017-breakout designed by Soldered Electronics.

Are you short on IO pins? Looking to increase the number of them? That’s what the GPIO Expander MCP23017 is for! It uses I2C communication to do so. With just two wires, 16 new fully configurable digital IO pins are added to a microcontroller.

Due to the jumpers on the board, the I2C address of a device can be changed. Thus, eight breakout boards can be connected to a microcontroller. All of the pins on the expander board have pull-out resistors that can be turned on and off.

IO-expander-MCP23017-breakout hardware design, from the project README
From the project README

Main components on the IO-expander-MCP23017-breakout hardware design

MCP23017T-E_SSNMOS-DUALSE5218

IO-expander-MCP23017-breakout hardware design bill of materials (BOM)

29 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP23017T-E_SS
U1
1
NMOS-DUAL
U2
1
SE5218
U3
2
HOLE_3.2mm
H1, H2
2
SMD_JUMPER_3_PAD_TRACE
JP1, JP2
1
SMD-JUMPER-CONNECTED_TRACE_SLODERMASK
JP3
1
SMD_JUMPER
JP4
3
SMD_JUMPER_3_PAD_CONNECTED_RIGHT
JP5, JP6, JP7
2
easyC-SMD
K1, K3
1
HEADER_MALE_4X1
K2
2
HEADER_MALE_8X1
K4, K6
1
HEADER_MALE_1X1
K5
1
HEADER_MALE_2X1
K7
2
2.2uF
C3, C4
8
10k
R1, R2, R3, R4, R5, R6, R7, R8

IO-expander-MCP23017-breakout hardware design design files

The KiCad project lives in the SolderedElectronics/IO-expander-MCP23017-breakout-hardware-design repository on GitHub; these links point at the commit this page was built from.

IO-expander-MCP23017-breakout hardware design: common questions

How big is the IO-expander-MCP23017-breakout hardware design?

The IO-expander-MCP23017-breakout hardware design measures 22 × 38 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the IO-expander-MCP23017-breakout hardware design?

29 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the IO-expander-MCP23017-breakout hardware design design files?

From the SolderedElectronics/IO-expander-MCP23017-breakout-hardware-design repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the IO-expander-MCP23017-breakout hardware design design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which SolderedElectronics chose for the repository.

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