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EBE21RD4AJFA Datasheet 2GB Registered DDR2 SDRAM DIMM

Manufacturer: Elpida Memory

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Datasheet Details

Part number EBE21RD4AJFA
Manufacturer Elpida Memory
File Size 292.02 KB
Description 2GB Registered DDR2 SDRAM DIMM
Download EBE21RD4AJFA Download (PDF)

Overview

DATA SHEET www.DataSheet4U.com 2GB Registered DDR2 SDRAM DIMM EBE21RD4AJFA (256M words × 72 bits, 2 Ranks) Specifications • Density: 2GB • Organization  256M words × 72 bits, 2 ranks • Mounting 36 pieces of 512M bits DDR2 SDRAM sealed in FBGA • Package: 240-pin socket type dual in line memory module (DIMM)  PCB height: 30.0mm  Lead pitch: 1.0mm  Lead-free (RoHS compliant) • Power supply: VDD = 1.8V ± 0.1V • Data rate: 667Mbps/533Mbps/400Mbps (max.) • Four internal banks for concurrent operation (components) • Interface: SSTL_18 • Burst lengths (BL): 4, 8 • /CAS Latency (CL): 3, 4, 5 • Precharge: auto precharge option for each burst access • Refresh: auto-refresh, self-refresh • Refresh cycles: 8192 cycles/64ms  Average refresh period 7.8µs at 0°C ≤ TC ≤ +85°C 3.

Key Features

  • Double-data-rate architecture; two data transfers per clock cycle.
  • The high-speed data transfer is realized by the 4 bits prefetch pipelined architecture.
  • Bi-directional differential data strobe (DQS and /DQS) is transmitted/received with data for capturing data at the receiver.
  • DQS is edge-aligned with data for READs; centeraligned with data for WRITEs.
  • Differential clock inputs (CK and /CK).
  • DLL aligns DQ and DQS transitions with CK transi.

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