# PCF8574T/3,512 (Component)
## Description
I/O Expander 8 I²C 100 kHz 16-SO #commonpartslibrary
#integratedcircuit
#ioexpander
## Component Details
- **Owner:** adrian95
- **Created:** 9/22/2023
- **Last Updated:** 8/5/2025
- **Visibility:** Public
- **Part Type:** Integrated Circuit
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Manufacturer Part Number:** PCF8574T/3,512
- **Datasheet URL:** https://www.nxp.com/docs/en/data-sheet/PCF8574_PCF8574A.pdf
- **Manufacturer Name:** NXP USA Inc.
- **Used in:** 25 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/pcf8574t3512/nxp-semiconductors.html?utm_currency=USD®ion=europe) | $0.6159 | 0 |
| [Digi-Key](https://www.digikey.com/en/products/detail/rochester-electronics-llc/PCF8574T-3-512/21198039) | $1.67 | 8.7K |
| [LCSC](https://www.lcsc.com/product-detail/C1522621.html) | $1.4921 | 0 |
| [Mouser](https://www.mouser.com/ProductDetail/NXP-Semiconductors/PCF8574T-3512?qs=LOCUfHb8d9twdQnCFHYQdg%3D%3D) | N/A | N/A |
| [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=PCF8574T-3.512) | $1.70 | 48 |
| [Verical](https://www.verical.com/pd/nxp-semiconductors-interface---i-o-expander-PCF8574T-3-512-112057?utm_currency=USD) | N/A | N/A |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** NXP
- **MPN:** PCF8574T/3,512
- **Package / Case Code:** 16-SO
- **Pin Count:** 16
- **Logic Function:** AND
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | A0 | |
| 2 | A1 | |
| 3 | A2 | |
| 4 | P0 | |
| 5 | P1 | |
| 6 | P2 | |
| 7 | P3 | |
| 8 | VSS | |
| 9 | P4 | |
| 10 | P5 | |
| 11 | P6 | |
| 12 | P7 | |
| 13 | ~INT | |
| 14 | SCL | |
| 15 | SDA | |
| 16 | VDD | |
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*Generated from [https://www.flux.ai/adrian95/pcf8574t3c512~3ki](https://www.flux.ai/adrian95/pcf8574t3c512~3ki)*