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DDR SRAMs

GSI's SigmaDDR SRAMs are the acknowledged leader in the industry with their combination of capacity and performance. SigmaDDR transaction rates are unequaled by any competitors.


SigmaDDR SRAMs are synchronous memories with a common read and write data bus. "DDR" refers to their ability to transfer 2 beats of data on the data bus in a single clock cycle. SigmaDDR memories are ideal for applications that alternate between read and write operations infrequently, at operating speeds of 250 MHz and above.


GSI's SigmaDDR devices are compatible with all competitor Double Data Rate SRAMs.

 

Features

  • SigmaDDR Interface
  • Dual Double Data Rate Interface
  • Pipelined Read operation 
  • Fully coherent Read and Write pipelines
  • ZQ mode pin for programmable output drive strength
  • IEEE 1149.1 JTAG-compliant Boundary Scan
  • JEDEC-standard pinout and package
  • RoHS-compliant package available 


Name Density Config. Speed (MHz) Burst Length Read Latency (RL) On-Die Termination Package 6/6 RoHS Temp Special Features Status
SigmaDDR-IIIe
View 89 products
72Mb, 144Mb, 288Mb x18, x36 Up to 833 2 2, 3 Weak/Strong/None 260 BGA yes, no Mil, Ind, Comm See Individual Products Production, Active, NRND
SigmaDDR-II+
View 1104 products
18Mb, 36Mb, 72Mb, 144Mb, 288Mb x8, x9, x18, x36 Up to 633 2 2, 2.5 n/a, Weak/Strong, Weak/None 165 BGA yes, no Ind, Comm See Individual Products Production, NRND
SigmaDDR-II
View 620 products
18Mb, 36Mb, 72Mb, 144Mb x8, x9, x18, x36 Up to 400 2, 4 1.5 n/a 165 BGA yes, no Mil, Ind, Comm See Individual Products Production, NRND
SigmaSIO DDR-II
View 380 products
18Mb, 36Mb, 72Mb, 144Mb, 288Mb x8, x9, x18, x36 Up to 400 2 1.5 n/a 165 BGA yes, no Ind, Comm See Individual Products Production, NRND
Part Number Density Configuration Speed (MHz) Burst Length Read Latency On Die Termination Package 6/6 RoHS Temp Special Features Status
GS81302TT38E-500I 144Mb x36 500 2 2.5 Weak/Strong 165 BGA no Ind none NRND
GS81302TT38E-450I 144Mb x36 450 2 2.5 Weak/Strong 165 BGA no Ind none NRND
GS81302TT38E-400I 144Mb x36 400 2 2.5 Weak/Strong 165 BGA no Ind none NRND
GS81302TT38E-350I 144Mb x36 350 2 2.5 Weak/Strong 165 BGA no Ind none NRND
GS81302T06E-500 144Mb x8 500 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T06E-450 144Mb x8 450 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T06E-400 144Mb x8 400 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T06E-350 144Mb x8 350 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T06E-500I 144Mb x8 500 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T06E-450I 144Mb x8 450 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T06E-400I 144Mb x8 400 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T06E-350I 144Mb x8 350 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T11E-500 144Mb x9 500 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T11E-450 144Mb x9 450 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T11E-400 144Mb x9 400 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T11E-350 144Mb x9 350 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T11E-500I 144Mb x9 500 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T11E-450I 144Mb x9 450 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T11E-400I 144Mb x9 400 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T11E-350I 144Mb x9 350 2 2.5 Weak/None 165 BGA no Ind none NRND
GS81302T20E-500 144Mb x18 500 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T20E-450 144Mb x18 450 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T20E-400 144Mb x18 400 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T20E-350 144Mb x18 350 2 2.5 Weak/None 165 BGA no Comm none NRND
GS81302T20E-500I 144Mb x18 500 2 2.5 Weak/None 165 BGA no Ind none NRND