The IDT72413 is a 64 x 5, high-speed First-In/First-Out (FIFO) that loads and empties data on a first-in-first-out basis. It is expandable in bit width. All speed versions are cascadable in depth. The FIFO has a Half-Full Flag, which signals when it has 32 or more words in memory. The Almost-Full/Empty Flag is active when there are 56 or more words in memory or when there are 8 or less words in memory. The IDT72413 is pin and functionally compatible to the MMI67413. It operates at a shift rate of 45MHz. This makes it ideal for use in high-speed data buffering applications. The IDT72413 can be used as a rate buffer, between two digital systems of varying data rates, in high-speed tape drivers, hard disk controllers, data communications controllers and graphics controllers.