MSI chips perform elementary digital functions such as decoders, multiplexers, registers, and counters. The following are TTL-type integrated circuits that provide such functions. Find their description in a data book and compare them with the corresponding component presented in this chapter.

a. IC type 74155 dual 2-to-4-line decoders.

b. IC type 74157 quadruple 2-to-1-line multiplexers. 

c. IC type 74194 4-bit bidirectional shift register with parallel load. 

d. IC type 74163 4-bit binary counter with parallel load and synchronous clear.