Patent Number: 6,480,408

Title: Twisted global column decoder

Abstract: Adjacent global column decode lines in a dynamic random access memory (DRAM) are twisted in combination with a complex twist of digit lines such that one global column decoder line provides access to four non-adjacent digit line pairs. The four non-adjacent digit pairs are routed to external pins, allowing data from each of the pairs to be read or written simultaneously. Further, I/O switches which are located between the twisted global column decoder lines are coupled to outside pairs of the twisted digit lines, and the I/O switches which are located outside the twisted global column decoder lines are coupled to inside ones of the complex twisted digit lines.

Inventors: Shirley; Brian M. (Boise, ID)

Assignee: Micron Technology, Inc.

International Classification: G11C 5/02 (20060101); G11C 005/02 ()

Expiration Date: 11/12/2019