The 72V04 is a 4K x 9 dual-port First-In, First-Out (FIFO) that operates at Vcc between 3.0V and 3.6V. The device will load and empty data on a first-in/first-out basis. It uses Full and Empty flags to prevent data overflow and underflow. And, it has a Retransmit (RT) capability that allows for resetting the read pointer to its initial position when RT is pulsed LOW. The 72V04 is designed for applications requiring asynchronous and simultaneous read/writes in multiprocessing and rate buffer applications.