cyclone V device 5CSXC6C6U23C8NES is supported in which Quartus software version?

Hi,

I think you are talking about 5CSXFC6C6U23C8 or 5CSXFC6C6U23C8ES which can be found in Quartus

Lite and std edition of tools.

N or ES in part number are just to Indicates specific device options or shipment method.

Let me know if this has helped resolve the issue you are facing or if you need any further assistance.

Best Regards,

Anand Raj Shankar