(EDD2508AETA / EDD2516AETA) 256M bits DDR SDRAM - Elpida Memory
Description
DATA SHEET
256M bits DDR SDRAM
EDD2508AETA (32M words × 8 bits) EDD2516AETA (16M words × 16 bits)
Specifications
• Density: 256M bits • Organization 8M words × 8 bits × 4 banks (EDD2508AETA) www.
DataSheet4U.
com 4M words × 16 bits × 4 banks (EDD2516AETA) • Package: 66-pin plastic TSOP (II) Lead-free (RoHS compliant) • Power supply: DDR400: VDD, VDDQ = 2.
6V ± 0.
1V DDR333, 266: VDD, VDDQ = 2.
5V ± 0.
2V • Data rate: 400Mbps/333Mbps/266Mbps (max.
) • Four internal banks for concurrent operation • Interface: SSTL_2 • Burst lengths (BL): 2, 4, 8 • Burst type (BT): Sequential (2, 4, 8) Interleave (2, 4, 8) • /CAS Latency (CL): 2, 2.
5, 3 • Precharge: auto precharge option for each burst access • Driver strength: normal/weak • Refresh: auto-refresh, self-refresh • Refresh cycles: 8192 cycles/64ms Average refresh period: 7.
8µs • Operating ambient temperature range TA = 0°C to +70°C
Features
• Double-data-rate architecture; two data transfers per clock cycle • The high-speed data transfer is realized by the 2 bits prefetch pipelined architecture • Bi-directional data strobe (DQS) is transmitted /received with data for capturing data at the receiver • Data inputs, outputs, and DM are synchronized with DQS • 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 transitions • Commands entered on each positive CK edge; data and data mask referenced to both edges of DQS • Data mask (DM) for write data
Document No.
E0859E50 (Ver.
5.
0) Date Published September 2007 (K) Japan Printed in Japan URL: http://www.
elpida.
com Elpida Memory, Inc.
2006-2007
EDD2508AETA, EDD2516AETA
Ordering Information
Part number EDD2508AETA-5B-E EDD2508AETA-5C-E EDD2508AETA-6B-E EDD2508AETA-7A-E EDD2508AETA-7B-E EDD2516AETA-5B-E EDD2516AETA-5C-E EDD2516AETA-6B-E EDD2516AETA-7A-E EDD2516AETA-7B-E Mask version E Organization (words × bits) 32M × 8 Internal banks 4 Data rate Mbps (max.
)...
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