256MB, 512MB, 1GB (x72, SR, ECC) 240-Pin DDR2 UDIMM Features DDR2 SDRAM UDIMM MT9HTF3272AY – 256MB MT9HTF6472AY – 512MB MT9HTF12872AY – 1GB Features • 240-pin, unbuffered dual in-line memory module • Fast data transfer rates: PC2-3200, PC2-4200, PC2-5300, or PC2-6400 • 256MB (32 Meg x 72), 512MB (64 Meg x 72), or 1GB (128 Meg x 72) • VDD = VDDQ 1.
8V • VDDSPD = 1.
7–3.
6V • JEDEC-standard 1.
8V I/O (SSTL_18-compatible) • Differential data strobe (DQS, DQS#) option • 4n-bit prefetch architecture • Single rank • Multiple internal device banks for concurrent operation • Programmable CAS latency (CL) • Posted CAS# additive latency (AL) • WRITE latency = READ latency - 1 tCK • Programmable burst le...

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