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CC-BY-NC-SA 3.0

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Raspberry Pi 40-channel daisy-chainable IO expander

5 months ago 176
  • Description
  • Documents
  • BOM
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Description

Dual MCP23017 + GPIO Daisy-chainable IO expander for Raspberry Pi. Uses swappable daughterboards for flexibility, compatible with the common txs0108e level converter boards. See https://easyeda.com/MadOverlord/io-expander-daughterboard for a MIC2981/Passthrough daughterboard, and https://easyeda.com/MadOverlord/io-expander-voltage-divider-daughterboard for a voltage divider daughterboard (for reducing higher voltage input signals down to 3v3 for the MCP chips.

Documents

IDC Outputs

Interface

I2C

PCB

PCB-GP

BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part BOM_Manufacturer BOM_Supplier BOM_Supplier Part
1 Header-Female-2.54_1x10 J1,J2,J3,J4,J5,J6,J7,J8,J9,J10 HDR-TH_10P-P2.54-V 10 2.54mm 1*10P Straight Female header Gold-plated BOOMELE LCSC C35445
2 4.7K RN-1-1,RN-1-2,RN-1-4,RN-1-3,RN-0-3,RN-0-4,RN-0-2,RN-0-1,RN-TSX-OE2,RN-1-5,RN-1-6,RN-MCP-0,RN-MCP-1,RN-TSX-OE1,RN-OUT-1,RN-OUT-2,RN-OUT-3,RN-OUT-4,RN-OUT-5,RN-OUT-6,RN-OUT-7,RN-OUT-8,RN-OUT-10,RN-OUT-9 RES-ARRAY-SMD_0603-8P-L3.2-W1.6-BL 24 4D03WGJ0472T5E UniOhm LCSC C1980
3 100nF C2,C1 C0805 2 0805B104M500 WTC LCSC C94108
4 MCP23017-E/SO MCP-1,MCP-0 SOIC-28_L18.1-W10.3-P1.27-LS10.3-BL 2 MCP23017-E/SO MICROCHIP LCSC C47023
5 B2B-XH-A (LF)(SN) EXT-TSX-OUT,EXT-TSX-IN,EXT-MCP,EXT-MCP1,EXT-TSX-IN1,EXT-TSX-OUT1 CONN-TH_B2B-XH-A (LF)(SN) 6 - JST Sales America LCSC C158012

Attachments

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IOExp-Unpopulated.jpg
IOExp-Populated.jpg
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