The TS3A27518ERTWR is a multiplexer switch IC (Integrated Circuit) manufactured by Texas Instruments. It is a 6B 1-of-2 multiplexer/demultiplexer with a bandwidth of 240 MHz. The device is an 8-pin low power, low on-resistance Mux/Demux IC, which enables communications in high-speed, Ethernet based, local area networks (LANs). The low on-resistance of the multiplexer switch helps to reduce power consumption, enabling designs requiring low power signal routing. This device is suitable for applications such as data trunking, 10/100/1000 Ethernet cable extenders, high speed point-to-point line drivers and receivers. Additionally, it has a power-on reset feature for reliable communications as well as an adjustable/variable input-level threshold for finer granularity of data switching. The package of the device is an SOIC-8.