MAX4892:10/100/1000 Base-T Ethernet LAN Switch

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. The MAX4890/MAX4891/MAX4892 switches provide an extremely low capacitance and on-resistance to meet Ethernet insertion and return-loss specifications. The MAX4891/MAX4892 feature one and three built-in LED switches, respectively. The MAX4890/MAX4891/MAX4892 are available in space-saving 32- and 36-lead TQFN packages, significantly reducing the required PC board area. These devices operate over the -40°C to +85°C temperature range.

Key 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
MAX4890, MAX4891, MAX4892: Typical Operating Circuit
MAX4890, MAX4891, MAX4892: Typical Operating Circuit
Applications/Uses
  • Board-Level Redundancy Protection
  • Notebooks and Docking Stations
  • Servers and Routers with Ethernet Interfaces
  • SONET/SDH Signal Routing
  • T3/E3 Redundancy Protection
  • Video Routing and Switching Systems
DataSheet
titleDownload file
MAX4890-MAX4892 Data SheetMAX4890-MAX4892.pdf
Parametrics
Part NumberProtocolFunctionsConfig.ChannelsNormal PositionVSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
RON
(Ω)
Bandwidth
(MHz)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxmaxmaxminmaxSee Notes
MAX4890LANMux/DeMux1-to-24Open33.66.51000150406.53.5TQFN/32$2.44 @1k
MAX48915TQFN/32$2.56 @1k
MAX48927TQFN/36$2.99 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4892ETXNo Longer AvailableMAX4892ETX+TQFN,;36 pin;37.2 mm²-40°C to +85°CNo
MAX4892ETX+ActiveTQFN,;36 pin;37.2 mm²-40°C to +85°CLead Free
MAX4892ETX+TActiveTQFN,;36 pin;37.2 mm²-40°C to +85°CLead Free
MAX4892ETX-TNo Longer AvailableMAX4892ETX+TQFN;36 pin-40°C to +85°CSee data sheet
MAX4890-MAX4892.pdf MAX4892
MAX4890-MAX4892.pdf MAX4890