The 'F194 is a high-speed 4-bit bidirectional universal shift register As a high-speed multifunctional sequential building block it is useful in a wide variety of applications It may be used in serial-serial shift left shift right serial-parallel parallel-serial and parallel-parallel data register transfers The 'F194 is similar in operation to the 'F195 universal shift register with added features of shift left without external connections and hold (do nothing) modes of operation