The 74LS194 bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register; they feature parallel inputs, parallel outputs, right-shift and left-shift serial inputs, operating-mode-control inputs, and a direct overriding clear line.

The 74LS20?contains two independent gates each of which performs the logic NAND function.

The 74LS245 octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation minimizes external timing requirements.

The 74LS32 is a 14 Pin Quad 2-Input OR Gate IC.?The 74LS32 provides four independent 2-input OR gates?with standard push-pull outputs. The device is designed for operation?with a power supply range of 2.0V to 6.0V.??