GSI Technology’s No Bus Turnaround (NBT) product portfolio is the largest in the industry with six different densities in x18, 32, 36 and 72 bit widths. Our NBT SRAMs provide the fastest clock rates and lowest power of any in the world.

NBT SRAMs are synchronous, burst-capable memories with a simplified interface that is designed to use a data bus’s maximum bandwidth. NBT devices do not require “turnaround” cycles (idle clock cycles between a read and write operation). NBT SRAMs are used in networking, industrial, automotive and medical imaging applications where a mid-range performance point (typically a 333–166 MHz clock rate) is required.


Name Density Config. Cycle Time (MHz) Access Time (ns) Voltage (V) Package 6/6 ROHS Temp Special Features Status
View 2245 products
144Mb, 72Mb, 36Mb, 18Mb, 9Mb, 4Mb, 288Mb x18, x36, x72, x32 Up to 400 As Low As 4 2.5, 3.3, 1.8 119 BGA, 209 BGA, 100 TQFP, 165 BGA, Ceramic QFP no, yes Comm, Ind, Mil See Individual Products Production, Active, Production-NRND
Part Number Density Cofig. Cycle Time (MHz) Access Time (ns) Voltage (V) Package 6/6 RoHS Temp Special Features Status
GS8642Z72C-250M 72Mb x72 250 6.5 2.5, 3.3 209 BGA no Mil JTAG, FLXDrive Production
GS8321Z18E-250IV 36Mb x18 250 6.5 1.8, 2.5 165 BGA no Ind JTAG Production-NRND
GS8321Z32AD-150IV 36Mb x32 150 7.5 1.8, 2.5 165 BGA no Ind JTAG Production
GS8321Z18AGD-150 36Mb x18 150 7.5 2.5, 3.3 165 BGA yes Comm JTAG Production
GS8642Z72C-167V 72Mb x72 167 8 1.8, 2.5 209 BGA no Comm JTAG, FLXDrive Production