---
title: "W5500 SN74LVC1G125 buffer purpose"
url: "https://maker.wiznet.io/forum/14522"
markdown_url: "https://maker.wiznet.io/forum/14522/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "shahrezau"
created: "2022-04-11T23:23:30+09:00"
last_activity: "2022-04-11T23:23:30+09:00"
language: "en"
views: 213
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 SN74LVC1G125 buffer purpose

## Question

Asked by shahrezau on 2022-04-11 in Ethernet Chips.

Hi

I would like to know what is purpose of gate buffer( SN74LVC1G125) on EVM board. (SPI Line)

I have 5V microcontroller that use W5500 do I need buffer, since datasheet mentioned is 5V tolerance logic.

Thanks

---

Source: https://maker.wiznet.io/forum/14522