A 800 MB/s 72 Mb SLDRAM with digitally-calibrated DLL

This 72 Mb synchronous-link DRAM (SLDRAM) is a proof-of-concept vehicle for next-generation memory. SLDRAM is a packet-protocol-based memory that employs source-synchronous busses with push-pull I/O for signaling integrity. SLDRAM devices are calibrated on power-up by the memory controller so individual memory devices do not have to meet tight timing specifications and compensate interconnect and loading variations.