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
GS8644Z36GE-250V 72Mb x36 250 6.5 1.8, 2.5 165 BGA yes Comm JTAG, FLXDrive Production
GS8161Z36DD-150V 18Mb x36 150 7.5 1.8, 2.5 165 BGA no Comm JTAG Production
GS8321Z18AD-150V 36Mb x18 150 7.5 1.8, 2.5 165 BGA no Comm JTAG Production
GS8161Z36BGD-200I 18Mb x36 200 6.5 2.5, 3.3 165 BGA yes Ind JTAG Production-NRND
GS8320Z36GT-166IV 36Mb x36 166 8 1.8, 2.5 100 TQFP yes Ind none Production-NRND