---
title: "W5500 packet loss caused by MEMS oscillator!"
url: "https://maker.wiznet.io/forum/14500"
markdown_url: "https://maker.wiznet.io/forum/14500/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "mikeselectricstuff"
created: "2022-03-10T19:26:29+09:00"
last_activity: "2022-03-10T19:26:29+09:00"
language: "en"
views: 346
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 packet loss caused by MEMS oscillator!

## Question

Asked by mikeselectricstuff on 2022-03-10 in Ethernet Chips.

Hi - I hope this may help someone.
I’ve just been tracking down an issue where I was seeing random 1-2% loss of incoming UDP packets on the W5500.
This turned out to be because I was using a MEMS 25MHz oscillator ( Microchip DSC6001). Changing to a crystal oscillator fixed it.

---

Source: https://maker.wiznet.io/forum/14500