# MCP23S17-E-SO_470569 (Component)
## Description
MCP23S17-E/SO
SOIC28-W_MC_MCH SOIC28-W_MC_MCH-M SOIC28-W_MC_MCH-L #ultralibrarian
## Component Details
- **Owner:** microchip-technology
- **Created:** 3/17/2026
- **Last Updated:** 3/17/2026
- **Visibility:** Public
- **Package or Case Code:** SOIC28-W_MC_MCH
- **Manufacturer Part Number:** MCP23S17-E/SO
- **Used in:** 2 projects
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/mcp23s17-eso/microchip-technology?utm_currency=USD®ion=europe) | $1.396 | 1.2K |
| [Digi-Key](https://www.digikey.com/en/products/detail/microchip-technology/MCP23S17-E-SO/894275) | $1.69 | 6.6K |
| [HQonline](https://www.hqonline.com/product-detail/i-o-expanders-microchip-mcp23s17-e-so-2500394706) | $1.57097 | 2 |
| [LCSC](https://www.lcsc.com/product-detail/C145413.html) | $1.5127 | 138 |
| [Mouser](https://www.mouser.com/ProductDetail/Microchip-Technology/MCP23S17-E-SO?qs=usxtMOJb1RzJScThsWtScg%3D%3D) | $1.69 | 39K |
| [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=MCP23S17-E%2FSO) | $1.59 | 27 |
| [Verical](https://www.verical.com/pd/microchip-technology-interface---i-o-expander-MCP23S17-E-SO-512861?utm_currency=USD) | $1.389 | 365 |
- **MPN:** MCP23S17-E/SO
- **Package / Case Code:** SO
- **Pin Count:** 28
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | GPB0 | |
| 2 | GPB1 | |
| 3 | GPB2 | |
| 4 | GPB3 | |
| 5 | GPB4 | |
| 6 | GPB5 | |
| 7 | GPB6 | |
| 8 | GPB7 | |
| 9 | VDD | |
| 10 | VSS | |
| 11 | *CS | |
| 12 | SCK | |
| 13 | SI | |
| 14 | SO | |
| 15 | A0 | |
| 16 | A1 | |
| 17 | A2 | |
| 18 | *RESET | |
| 19 | INTB | |
| 20 | INTA | |
| 21 | GPA0 | |
| 22 | GPA1 | |
| 23 | GPA2 | |
| 24 | GPA3 | |
| 25 | GPA4 | |
| 26 | GPA5 | |
| 27 | GPA6 | |
| 28 | GPA7 | |
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*Generated from [https://www.flux.ai/microchip-technology/mcp23s17-e-so470569~ak](https://www.flux.ai/microchip-technology/mcp23s17-e-so470569~ak)*