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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
GS82582TT20GE-500 288Mb x18 500 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT20GE-450 288Mb x18 450 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT20GE-400 288Mb x18 400 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT20GE-550I 288Mb x18 550 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT20GE-500I 288Mb x18 500 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT20GE-450I 288Mb x18 450 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT20GE-400I 288Mb x18 400 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT38GE-550 288Mb x36 550 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT38GE-500 288Mb x36 500 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT38GE-450 288Mb x36 450 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT38GE-400 288Mb x36 400 2 2.5 Weak/Strong 165 BGA yes Comm none Production
GS82582TT38GE-550I 288Mb x36 550 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT38GE-500I 288Mb x36 500 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT38GE-450I 288Mb x36 450 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582TT38GE-400I 288Mb x36 400 2 2.5 Weak/Strong 165 BGA yes Ind none Production
GS82582T19GE-450 288Mb x18 450 2 2 Weak/None 165 BGA yes Comm none Production
GS82582T19GE-400 288Mb x18 400 2 2 Weak/None 165 BGA yes Comm none Production
GS82582T19GE-375 288Mb x18 375 2 2 Weak/None 165 BGA yes Comm none Production
GS82582T19GE-333 288Mb x18 333 2 2 Weak/None 165 BGA yes Comm none Production
GS82582T19GE-450I 288Mb x18 450 2 2 Weak/None 165 BGA yes Ind none Production
GS82582T19GE-400I 288Mb x18 400 2 2 Weak/None 165 BGA yes Ind none Production
GS82582T19GE-375I 288Mb x18 375 2 2 Weak/None 165 BGA yes Ind none Production
GS82582T19GE-333I 288Mb x18 333 2 2 Weak/None 165 BGA yes Ind none Production
GS82582T37GE-450 288Mb x36 450 2 2 Weak/None 165 BGA yes Comm none Production
GS82582T37GE-400 288Mb x36 400 2 2 Weak/None 165 BGA yes Comm none Production