Maxim Integrated Products’ MAX4927 is a quad Gigabit-LAN switch that integrates robust, ESD-protection structures. This device switches signals from two separate interface transformers and connects them to a single, 1000 Base-T Ethernet PHY. It also meets the following ESD-protection specifications: ±15 kV IEC 61000-4-2 air-gap discharge, ±8 kV IEC 61000-4-2 contact discharge, and ±15 kV human body model.

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Based on an n-channel MOSFET architecture, the MAX4927 includes an efficient, internal charge pump that features ultra-low quiescent current for power-sensitive designs. Unlike other charge-pump circuits, this device includes internal flyback capacitors that reduce design time, board space, and cost. The MAX4927's advanced architecture enables it to achieve extremely low 8.0 pF on capacitance and 4 Ω on resistance to meet Ethernet-insertion and return-loss specifications.

The MAX4927 operates from a single 3.0 V to 3.6 V supply and includes LED switches that allow LED output signals to be routed to a docking station along with Ethernet signals. Available in a 5 mm x 11 mm 56-pin TQFN package, prices start at $1 for 1000 pieces.