General Description

The MAX4890/MAX4891/MAX4892 high-speed analog switches meet the needs of 10/100/1000 Base-T applications. These devices switch the signals from two interface transformers and connect the signals to a single 10/100/1000 Base-T Ethernet PHY, simplifying docking station design and reducing manufacturing costs. The MAX4890/MAX4891/MAX4892 can also route signals from a common interface transformer to two different boards in board-redundancy applications.

Features

♦ Single +3.0V to +3.6V Power-Supply Voltage

♦ Low On-Resistance (RON): 4Ω (typ), 6.5Ω (max)

♦ Ultra-Low On-Capacitance (CON): 6.5pF (typ)

♦ Low < 200ps Bit-to-Bit Skew

♦ -3dB Bandwidth: 1GHz

♦ Optimized Pin-Out for Easy Transformer and PHY Interface

♦ Built-In LED Switches for Switching Indicators to Docking Station

♦ Low 450µA (max) Quiescent Current

♦ Bidirectional 8 to 16 Multiplexer/Demultiplexer

♦ Space-Saving Packages

   32-Pin, 5mm x 5mm, TQFN Package

   36-Pin, 6mm x 6mm, TQFN Package

Applications

  Notebooks and Docking Stations

  Servers and Routers with Ethernet Interfaces

  Board-Level Redundancy Protection

  SONET/SDH Signal Routing

  T3/E3 Redundancy Protection

  Video Switching