The FPGA should have some ESD protection built-in. The lowest capacitance I've seen in a protection part is Cal Micro's CM1213. -tom -----Original Message----- From: JP Nicholls [mailto:jpnicholls@xxxxxxxx]=20 Sent: Thursday, July 10, 2003 7:31 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Recommendation for high-speed digital input protection? si-list Digest V3 #183 We have a fast digital connection (1.8Gbps) which is going =20 to the front panel of a unit. The connection is direct to an FPGA. Such "outside world" Connectors are usually protected against =20 ESD using transorbs or zener diodes on the input lines. At =20 these gigabit speeds, zeners become capacitors and will distort the signal. Can anyone recommend a suitable input protection scheme, or =20 any particular manufacturers products? Many thanks, -- JP Nicholls / jpnicholls@xxxxxxxx Digital Design Engineer Powerwave UK Ltd Embassy House Queen's Avenue Bristol, BS8 1SB United Kingdom ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu