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This type of SDRAM is slower than the DDR variants, because only one word of data is transmitted per clock cycle (single data rate). But this type is also faster than its predecessors EDO-RAM and FPM-RAM which took typically 2 or 3 clocks to transfer one word of data.
Density Org. Part No. VDD. Speed Package Download
64M  4M x 16  CS56SD64 3.3V  166 / 143Mhz  54Pin TSOP-II (400mil)   NULL
128M  8M x 16  CS56SD128 3.3V  166 / 143Mhz  54Pin TSOP-II (400mil)   NULL
256M  16M x 16  CS56SD256 3.3V  166 / 143Mhz  54Pin TSOP-II (400mil)   NULL
512M  32M x 16  CS56SD512 2.7~3.6V  166 / 143Mhz  54Pin TSOP-II (400mil)  NULL
512M  32M x 16  CS56SD512 2.7~3.6V   166 / 143Mhz   54ball TFBGA-8mm x 8mm x 1.0mm  NULL
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