# PCA9539xD (Component)

## Description

16\-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, SOIC\-24
NXP IO\-expander PCA9539D PCA9539RD
SOIC\*7\.5x15\.4mm?P1\.27mm\* 

## Component Details

- **Owner:** kicad\-part\-library
- **Created:** 10/28/2026
- **Last Updated:** 10/28/2026
- **Visibility:** Public
- **Datasheet URL:** https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/0f472c8ad3f0fbbefbd8d0ea78e7f4931c7cc979eb7e98f4a59cf34dff943c0b\.pdf
- **Manufacturer Name:** NXP
- **Package or Case Code:** SOIC\-24W\_7\.5x15\.4mm\_P1\.27mm
- **Part Type:** Interface
- **Manufacturer Part Number:** PCA9539xD

- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** NXP
- **MPN:** PCA9539xD
- **Package / Case Code:** 24\-SOIC
- **Pin Count:** 24
## Pins

| Pin | Name | Type |
|-----|------|------|
| 1 | \~\{INT\} | Open Collector |
| 2 | A1 | Input |
| 3 | \~\{RESET\} | Input |
| 4 | IO0\_0 | Bi\-Directional |
| 5 | IO0\_1 | Bi\-Directional |
| 6 | IO0\_2 | Bi\-Directional |
| 7 | IO0\_3 | Bi\-Directional |
| 8 | IO0\_4 | Bi\-Directional |
| 9 | IO0\_5 | Bi\-Directional |
| 10 | IO0\_6 | Bi\-Directional |
| 11 | IO0\_7 | Bi\-Directional |
| 12 | V\_\{SS\} | Power In |
| 13 | IO1\_0 | Bi\-Directional |
| 14 | IO1\_1 | Bi\-Directional |
| 15 | IO1\_2 | Bi\-Directional |
| 16 | IO1\_3 | Bi\-Directional |
| 17 | IO1\_4 | Bi\-Directional |
| 18 | IO1\_5 | Bi\-Directional |
| 19 | IO1\_6 | Bi\-Directional |
| 20 | IO1\_7 | Bi\-Directional |
| 21 | A0 | Input |
| 22 | SCL | Input |
| 23 | SDA | Bi\-Directional |
| 24 | V\_\{DD\} | Power In |

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*Generated from [https://flux\.ai/kicad\-part\-library/pca9539xd\~7pp](https://flux.ai/kicad-part-library/pca9539xd~7pp)*