A 65 nm 1 Gb 2b/cell NOR flash with 2.25 MB/s program throughput and 400 MB/s DDR interface

This paper describes a 1.8 V, 1 Gb 2 b/cell NOR Flash memory, based on time-domain voltage-ramp reading concept and designed in a 65 nm technology. Program method, architecture and algorithm to reach 2.25 MB/s programming throughput are also presented, as well as the read concept, allowing 70 ns random access time and a 400 MB/s sustained read throughput via a DDR interface.