Hybrid module protects Ethernet PHY chips

To protect sensitive PHY chips from damage due to electrostatic discharge (ESD) and lightning-induced surge events, Littelfuse has introduced the first of a series of TVS diode arrays (SPA Diodes). The SP4031 series hybrid protection modules are designed to protect two lines of 10/100/1000BaseT Ethernet ports from damage due to sustained over-current and over-voltage. Through-package routing permits the module’s circuitry to protect an Ethernet PHY chip from damage.

During a prolonged overvoltage event such as a power fault, the module will present a high impedance. The high impedance state will reset once the power fault event has ended. During a fast transient event, the component will clamp, protecting any downstream chipset from surge or ESD damage.

The SP4031 series’ low loading capacitance of just 2.5pF per I/O, and high surge handling capability of up to 35A, make it suitable for protecting Ethernet and other high-speed data interfaces, confirms Littelfuse.  Typical applications for the SP4031 series hybrid protection module include 10/100/1000BaseT Ethernet, (ITU K.21 Basic level compliance), as well as integrated magnetics, or ADSL/VDSL/G.fast modem, industrial Ethernet and smart TVs.

The SP4031 series hybrid protection module is available in an SOIC-8 package in tape and reel format in quantities of 2,500. Sample requests may be placed through authorised Littelfuse distributors worldwide.

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