---
title: "CO400"
url: "https://www.qualcomm.com/data-center/products/qualcomm-dragonfly-co400"
description: "Qualcomm Dragonfly CO400 is a 5nm single-chip coherent-lite DSP using DP-QAM16 at 400G/wavelength for 800G-LR2 optical modules."
---

# CO400

Qualcomm Dragonfly™

Active

![chip image](https://s7d1.scene7.com/is/image/dmqualcommprod/co400?fmt=webp-alpha&qlt=85)

[Contact Sales](https://www.qualcomm.com/support/contact/forms/data-center)

On this page

[Overview](https://www.qualcomm.com/#overview)
[Use Cases](https://www.qualcomm.com/#usecases)
[Benefits](https://www.qualcomm.com/#benefits)
[Features / Specs](https://www.qualcomm.com/#features)

## 800G Coherent-lite Optical DSP

The Qualcomm Dragonfly™ CO400 DSP is a 5nm CMOS single-chip, low-latency Coherent-lite Digital Signal Processor (DSP), utilizing DP-QAM16 modulation at 400G/wavelength to enable campus reach connectivity between datacenters. The primary application is up to 20km reach 800G-LR2 optical modules using O-band to support 2x400G transmission.

Product license agreement

## Use Cases

Coherent lite Optical modules

## Benefits

- **DSP Controlled laser**
Enables use of low cost lasers

- **Multiple FEC Options**
Low latency Hamming, High performance BCH

- **O-band Reach**
Supports up to 20km reach using O-band optics

## Features

- DP 16QAM 2x400G
- Host Compliant to IEEE 802.3 df Standard
- Up to 20km reach
- PRBS gen/checker
- Diagnostics and Monitoring: FEC error, EYE, SNR, Host/Line Loopback
- FEC: Hamming or BCH option
- Optional MACSec