Dual 4:1 analog switch in 20-TSSOP
The MAX7367EUP+ is a dual 4:1 multiplexer/demultiplexer from Analog Devices, packaged in a 20-TSSOP with a 0.173-inch body width. It switches one of four differential or single-ended analog signals onto a common bus, with the 4:1 circuit per channel and a single enable per mux. On-state resistance is 24 Ohms maximum across the 2.3 V to 5.5 V single-supply range, which sets the insertion loss and the RC time constant for the signal path. The bi-directional feature means the mux passes signals in either direction — useful for I²C bus multiplexing where the data line is bidirectional by nature.
Supply rails and signal integrity
The 24 Ohm on-resistance is specified as a maximum at the supply voltage and temperature extremes; the actual resistance will be lower at room temperature and higher V+, but the 24 Ohm ceiling is the number to use for worst-case insertion loss and bandwidth calculations. Because the part is a 4:1 mux per channel with a single enable, the off-channel leakage and capacitance are not specified in the record — but the 20-TSSOP package limits the number of I/O pins to 20, so the pinout is dense. The 0.173-inch body width (4.40 mm) is a standard TSSOP footprint; the board layout should follow the recommended land pattern for 20-TSSOP to keep the thermal and parasitic profile consistent.