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EMI filters double ESD protection, cut PCB space

Posted: 27 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:NXP? EMI filters? ESD protection?

NXP claims a breakthrough in ESD protection30kV contact dischargefor its EMI filters in an ultrathin leadless package (UTLP) with a height of 0.5mm and pad pitch of 0.4mm. The IP4253 and IP4254 EMI filters are designed for portable applications such as mobile phones, PDAs, MP3 players and GPS navigation.

This offers handheld designers the opportunity to reduce the size of their PCBs while doubling the level of integrated ESD protection, said NXP. With so much functionality available in mobile multimedia devices, the RF transceiver in the handset interferes with more interfaces, making a higher degree of EMI filtering essential, added the company. Moreover, the core ICs in mobile multimedia devices require a higher level of protection from electrostatic discharge, since they are manufactured using smaller process technologies to enable a higher level of integration.

The IP4253 and IP4254 EMI filters are available in 4-, 6- and 8-channel configurations, each with component values of 15pF/100/15pF and 15pF/200/15pF. These EMI filters are said to offer a 90 percent space reduction compared to alternative discrete technology. With a pad pitch of only 0.4mm, the IP4253 and IP4254 devices enable a space reduction of more than 30 percent compared to alternative solutions in a 0.5mm pitch size. In addition, the UTLP increases the "silicon to plastic" ratio and offers less parasitic capacitance and inductance compared to other plastic packages, due to shorter wire length and internal traces, making it suitable for high-frequency applications, said the company.

Production quantities of the products are available in a RoHS compliant, lead-free version, as well as a green package version without halogens in the plastic.

- Gina Roos

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