A 21ns 32K × 8 CMOS SRAM with a selectively pumped P-well array

A selectivity pumped P-well array used in a 32K×8 CMOS SRAM with a divided-word line block architecture to achieve a 21ns access time, will be described. The chip (6.83×8.97mm) was processed in a 1.2μm double-level metal, twin-well CMOS technology. Active power is 330mW at 22MHz.