Description
The STMUX1800L is a 16- to 8-bit multiplexer/demultiplexer low RON bidirectional LAN switch designed for various standards, such as 10/100/1000 Ethernet. It is designed for very low crosstalk, low bit-to-bit skew and low I/O capacitance. The differential signal from the Gigabit Ethernet transceiver is multiplexed into one of two selected outputs while the unselected switch goes to Hi-Z status. The device integrates three SPDT (single pole dual throw) switches, for LED support. QFN56

Features
■ Low RON: 4.0 Ω typical
■ VCC operating range: 3.0 to 3.6 V
■ Enhanced ESD protection: > 8 kV (contact) and 15 kV (HBM)
■ Channel on capacitance: 9.5 pF typical
■ Switching time speed: 9 ns
■ Near to zero propagation delay: 250 ps
■ Very low crosstalk: -45 dB at 250 MHz
■ Bit-to-bit skew: 200 ps
■ > 600 MHz -3 dB typical bandwidth (or data frequency)
■ Three SPDT switches for LED support
■ Rail-to-rail switching on data I/O ports (0 V to 5 V)

Applications
■ 10/100/1000 Mbit Ethernet switching
■ Audio/video switching