IO-expander-MCP23017-breakout hardware design

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

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_SS NMOS-DUAL SE5218

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

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

Qty	Part	Footprint	Refs
1	MCP23017T-E_SS	MCP23017	U1
1	NMOS-DUAL	SOT-363	U2
1	SE5218	SOT-23-5	U3
2	HOLE_3.2mm	HOLE_3.2mm	H1, H2
2	SMD_JUMPER_3_PAD_TRACE	SMD_JUMPER_3_PAD_TRACE	JP1, JP2
1	SMD-JUMPER-CONNECTED_TRACE_SLODERMASK	SMD-JUMPER-CONNECTED_TRACE_SLODERMASK	JP3
1	SMD_JUMPER	SMD_JUMPER	JP4
3	SMD_JUMPER_3_PAD_CONNECTED_RIGHT	SMD_JUMPER_3_PAD_CONNECTED_RIGHT	JP5, JP6, JP7
2	easyC-SMD	easyC-connector	K1, K3
1	HEADER_MALE_4X1	HEADER_MALE_4X1	K2
2	HEADER_MALE_8X1	HEADER_MALE_8X1	K4, K6
1	HEADER_MALE_1X1	HEADER_MALE_1X1	K5
1	HEADER_MALE_2X1	HEADER_MALE_2X1	K7
2	2.2uF	0603C	C3, C4
8	10k	0603R	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.