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ESD protection device suits high-speed interfaces

Posted: 12 Mar 2010     Print Version  Bookmark and Share

Keywords:ESD  protection device  USB  eSATA 

NXP Semiconductors has released the IP4284CZ10 ESD protection device for high-speed differential interfaces such as USB 3.0 and eSATA.

The IP4284CZ10 delivers 8kV of contact ESD protection which is at level 4 according to the IEC61000-4-2 standard. The device also offers -70dB @ 2.5GHz differential crosstalk and 0.05pF (typical) line to line capacitance matching. It also features extremely low channel capacitance of 0.5pF (typical), in the range of 0V to 5V independent of the bias voltage as well as wide pass-band up to 8GHz and very low clamping voltage and dynamic resistance.

USB 3.0 and eSATA transmit and receive simultaneously and have unique signal integrity requirements for ESD devices that have not existed with half-duplex or unidirectional high-speed interfaces such as USB 2.0, HDMI and DisplayPort. The IP4284CZ10 was optimised in order to meet the dual requirements of matching capacitance, while maintaining low crosstalk between differential pairs and cost benefits of a single silicon die. This minimises the signal skew and data errors on sensitive receivers when an adjacent transmitter channel is active.

"SuperSpeed USB is now adopted by the major players in the computing industry and customers show a high interest in ESD protection for the new data lines. The IP4284CZ10 is already being used by customers for their latest computers," says Stefan Seider, product marketing manager, integrated discretes, NXP.

A complete design-in package is available, which includes layout recommendations, eye diagrams, crosstalk measurements, which are summarised in an USB 3.0 application note. The IP4284CZ10 is available either in the leadless SOT1059 (1mm x 2.5mm x 0.5mm) or in the leaded TSSOP10 package (3mm x 3mm x 1.1mm), which are both Pb-free and RoHS-compliant.

The NXP IP4284CZ10 is in mass production and available worldwide. Pricing for the IP4284CZ10 is US Rs.13.85 ($0.30) per piece at 10,000 quantities.

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