A 390 mm/sup 2/ 16-bank 1 Gb DDR SDRAM with hybrid bitline architecture

This 390mm/sup 2/ 16-bank 1Gb double-data-rate synchronous DRAM (DDR SDRAM) includes: (1) hybrid-bitline architecture; (2) hierarchical column-select operation; (3) hierarchical 8b prefetch; and (4) 1V swing single-ended read-write-drive (RWD) circuitry.