Description The MC-458CB641ES, MC-458CB641PS and MC-458CB641XS are 8,388,608 words by 64 bits synchronous dynamic RAM module (Small Outline DIMM) on which 4 pieces of 128M SDRAM: µPD45128163 are assembled. These modules provide high density and large quantities of memory in a small space without utilizing the surfacemounting technology on the printed circuit board. Decoupling capacitors are mounted on power supply line for noise reduction. Features • 8,388,608 words by 64 bits organization • Clock frequency and access time from CLK • Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge • Pulsed interface • Possible to assert random column address in every cycle • Quad internal banks controlled by BA0, BA1 (Bank Select) • Programmable burst-length: 1, 2, 4, 8 and Full Page • Programmable wrap sequence (Sequential / Interleave) • Programmable /CAS latency (2, 3) • Automatic precharge and controlled precharge • CBR (Auto) refresh and self refresh • Single 3.3V ±0.3V power supply • LVTTL compatible • 4,096 refresh cycles/64 ms • Burst termination by Burst Stop command and Precharge command • 144-pin small outline dual in-line memory module (Pin pitch = 0.8 mm) • Unbuffered type • Serial PD
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