The MCM69L817 is a 4M bit synchronous fast static RAM designed to provide a burstable, high performance, secondary cache for the PowerPCTM and other high performance microprocessors. It is organized as 256K words of 18 bits each. This device integrates input registers, a 2bit address counter, and high speed SRAM onto a single monolithic circuit for reduced parts count in cache data RAM applications. Synchronous design allows precise cycle control with the use of an external clock (K).