Low-power embedded SRAM modules with expanded margins for writing

A low-power embedded SRAM module implements a writing margin expansion for low-voltage operation, a write replica circuit for low-power operation and a low-leakage structure. The replica circuit reduces active power by 18%, and a 512kB module operates at 450MHz, has 7.8 /spl mu/A leakage in standby, and a minimum V/sub DD/ of 0.8V.