High-Speed Gigabit-LAN Switch Provides ±15kV ESD Protection in an Industry-Standard Package
SUNNYVALE, CA—November 27, 2007—Maxim Integrated Products (Pink Sheets: MXIM) introduces the MAX4927 quad, high-speed, high-bandwidth, Gigabit-LAN switch. This device switches signals from two separate interface transformers and connects them to a single, 1000 Base-T Ethernet PHY. To save space and cost, the MAX4927 integrates robust, ESD-protection structures that eliminate the need for external ESD diodes while meeting the following ESD-protection specifications: ±15kV IEC 61000-4-2 Air-Gap Discharge, ±8kV IEC 61000-4-2 Contact Discharge, and ±15kV Human Body Model. The MAX4927 also includes LED switches that allow LED output signals to be routed to a docking station along with Ethernet signals. Available in an industry-standard, 5mm x 11mm, 56-pin TQFN package, the MAX4927 is ideal for upgrading the performance of applications that require LED and Ethernet signal switching, such as notebooks and docking stations.
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 8.0pF on-capacitance and 4Ω on-resistance to meet Ethernet insertion and return-loss specifications.
The MAX4927 operates from a single 3.0V to 3.6V supply and is fully specified over the -40°C to +85°C extended temperature range. Prices start at $1.00 (1000-up, FOB USA).
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