DATA SHEET
512MB DDR2 SDRAM SO-DIMM
EBE52UD6ABSA (64M words × 64 bits, 2 Ranks)
Description
Features
The EBE52UD6ABSA is 64M words × 64 bits, 2 ranks
DDR2 SDRAM Small Outline Dual In-line Memory
Module, mounting 8 pieces of 512M bits DDR2
SDRAM sealed in FBGA (µBGA) package. Read and
write operations are performed at the cross points of
the CK and the /CK. This high-speed data transfer is
realized by the 4 bits prefetch-pipelined architecture.
Data strobe (DQS and /DQS) both for read and write
are available for high speed and reliable data bus
design. By setting extended mode register, the on-chip
Delay Locked Loop (DLL) can be set enable or disable.
This module provides high density mounting without
• 200-pin socket type small outline dual in line memory
module (SO-DIMM)
PCB height: 30.0mm
Lead pitch: 0.6mm
Lead-free
• 1.8V power supply
• Data rate: 533Mbps/400Mbps (max.)
• 1.8V (SSTL_18 compatible) I/O
• Double-data-rate architecture: two data transfers per
clock cycle
• Bi-directional, differential data strobe (DQS and
/DQS) is transmitted/received with data, to be used in
capturing data at the receiver
utilizing surface mount technology.
Decoupling
capacitors are mounted beside each FBGA (µBGA) on
the module board.
• DQS is edge aligned with data for READs: center-
aligned with data for WRITEs
Note: Do not push the components or drop the
modules in order to avoid mechanical defects,
which may result in electrical defects.
• Differential clock inputs (CK and /CK)
• DLL aligns DQ and DQS transitions with CK
transitions
• Commands entered on each positive CK edge: data
and data mask referenced to both edges of DQS
• Four internal banks for concurrent operation
(Component)
• Data mask (DM) for write data
• Burst lengths: 4, 8
• /CAS Latency (CL): 3, 4, 5
• Auto precharge operation for each burst access
• Auto refresh and self refresh modes
• 7.8µs average periodic refresh interval
• Posted CAS by programmable additive latency for
better command and data bus efficiency
• Off-Chip-Driver Impedance Adjustment and On-Die-
Termination for better signal quality
• /DQS can be disabled for single-ended Data Strobe
operation.
Document No. E0418E30 (Ver. 3.0)
Date Published June 2004 (K) Japan
URL: http://www.elpida.com
Elpida Memory, Inc. 2003-2004