The Harris CD74HC40105 and CD74HCT40105 are highspeed silicon-gate CMOS devices that are compatible, except for "shift-out" circuitry, with the Harris CD40105B. They are low-power first-in-out (FIFO) "elastic" storage registers that can store 16 four-bit words. The 40105 is capable of handling input and output data at different shifting rates. This feature makes particularly useful as a buffer between asynchronous systems.