The SY100S364 is a 16-input multiplexer designed for use in high-performance ECL systems. The four Data Select inputs (S0, S1, S2, S3) determine the bit from the 16 inputs (In) that will be passed on to the output as shown in the Truth Table. The output data polarity is the same as the input. The inputs on the device have 75K pull-down resistors.