High-Speed Analog Switches for Gigabit Ethernet Applications that Switch the Signals from Two Interface Transformers and Connect Them to a Single Ethernet Controller
The MAX4890E/MAX4892E meet the needs of high-speed
differential switching. The devices handle the needs of
Gigabit Ethernet (10/100/1000) Base-T switching as
well as LVDS and LVPECL switching. The MAX4890E/MAX4892E provide enhanced ESD protection up to
±15kV, and excellent high-frequency response, making
the devices especially useful for interfaces that must go to
an outside connection.
Both devices provide extremely low capacitance
(CON), as well as low resistance (RON), for low-insertion
loss and very wide bandwidth. In addition to the four
pairs of DPDT switches, the MAX4892E provides LED
switching for laptop computer/docking station use.
The MAX4890E/MAX4892E are pin-for-pin equivalents
to the MAX4890/MAX4892 and can replace these
devices for those applications requiring the enhanced
ESD protection. Both devices are available in space-saving
TQFN packages and operate over the standard
-40°C to +85°C temperature range.
Key Features
Applications/Uses
±15kV ESD Protected Per MIL-STD-883, Method
3015
Single +3.0V to +3.6V Power-Supply Voltage
Low On-Resistance (RON): 4Ω (typ), 6.5Ω (max)
Ultra-Low On-Capacitance (CON): 8pF (typ)
-23dB Return Loss (100MHz)
-3dB Bandwidth (650MHz)
Optimized Pin Out for Easy Transformer and PHY
Interface
Built-In LED Switches for Switching Indicators to
Docking Station (MAX4892E)
Low 450µA (max) Quiescent Current
Bidirectional 8 to 16 Multiplexer/Demultiplexer
Standard Pin Out, Matching the MAX4890 and
MAX4892
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