HY5PS1G421M sdram equivalent, (hy5ps1g421 / hy5ps1g821) 1gb ddr2 sdram.
and Ordering Information 1.1.1 Key Feaures 1.1.2 Ordering Information 1.1.3 Ordering Frequency 1.2 Pin configuration 1.2.1 256M × 4 DDR2 DDP Pin Configuration 1.2.2 128M .
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