Circuit & System Protection


ESD protection for USB 3.0

28 April 2010 Circuit & System Protection

NXP Semiconductors has announced availability of a new ESD protection device, the IP4284CZ10, for high-speed differential interfaces such as USB 3.0 and eSATA. The part offers very low differential crosstalk with excellent line-to-line capacitance matching and straight-through routing for optimised signal integrity. It delivers 8 kV of contact ESD protection which is at level 4 according to the IEC61000-4-2 standard.

USB 3.0 and eSATA transmit and receive simultaneously and have unique signal integrity requirements for ESD devices that do not exist 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.

A complete design-in package is available, which includes layout recommendations, eye diagrams and crosstalk measurements, which are summarised in a USB 3.0 application note. The IP4284CZ10 is available either in the leadless SOT1059 (1,0 x 2,5 x 0,5 mm) or in the leaded TSSOP10 package (3,0 x 3,0 x 1,1 mm), which are both lead-free and RoHS compliant.



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