INTERFACE LAYOUT METHOD IN RAMBUS DRAM MORE THAN 256M

摘要

PURPOSE: An interface layout method in a RAMBUS DRAM is provided to satisfy requisite for the 400MHz operation and simultaneously minimize the size of an interface area. CONSTITUTION: The interface layout method puts an area more than a predetermined length between the first data input/output pad area(100), a DDL(Delay Locked Loop) circuit area(92), a control signal inputting pad area(102) and the second input/output pad area(104). A standard area(90) is disposed in the area more than the predetermined length. As disposing a standard portion between pad areas, the height of the interface area is reduced and the length of a clock line is reduced because cells operating with 400MHz are laid in close. Accordingly, power consumption is reduced.