A high-speed Hi-CMOSII 4K static RAM

Using advanced high-performance CMOS (Hi-CMOSII) technology and a high-speed circuit technique, a fully static 4096-word by one-bit RAM with typical address access time of 18 ns and power dissipation of 150 mW has been designed. The power-access-time product realized by the design is almost an order of magnitude better than existing NMOS 4K static RAMs. Moreover, to produce low-cost high-density static RAMs, a new redundancy technique utilizing laser shorting of intrinsic polysilicon is proposed.