Maxim's MAX14778 dual 4:1 analog multiplexer supports analog signals up to ±25 V with a single 3.0 V to 5.5 V supply. Each multiplexer has separate control inputs to allow independent switching, making the device ideal for multiplexing different communications signals with the same connector pins. Extended ESD protection of ±5 kV (human body model) enables direct interfacing to cables and connectors. It features a low 1.5 Ω (max.) on-resistance and 3 mΩ (typ.) flatness to maximize signal integrity over the entire common-mode voltage range. Each multiplexer can carry up to 300 mA of continuous current through the multiplexer in either direction. The MAX14778 supports switching of full-speed USB 1.1 signals (12 Mbps) and RS-485 data rates of up to 20 Mbps. It is available in a 20-pin (5 mm x 5 mm) TQFN package and is specified over the -40°C to +85°C extended temperature range.

Video: MAX14778 Demo, Dual 4:1 Analog Multiplexer