Description
The MC-458CB646 is a 8,388,608 words by 64 bits synchronous dynamic RAM module on which 8 pieces of 64M SDRAM: µPD4564841 are assembled.
This module provides high density and large quantities of memory in a small space without utilizing the surface mounting 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 and 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
⢠All DQs have 10 ⦠±10 % of series resistor
⢠Single 3.3 V ± 0.3 V power supply
⢠LVTTL compatible
⢠4,096 refresh cycles/64 ms
⢠Burst termination by Burst Stop command and Precharge command
⢠168-pin dual in-line memory module (Pin pitch = 1.27 mm)
⢠Unbuffered type
⢠Serial PD
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