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EBD21RD4ABNA Datasheet (PDF) - Elpida Memory

EBD21RD4ABNA Datasheet PDF - Elpida Memory
Part # EBD21RD4ABNA
Download  EBD21RD4ABNA Download

File Size   177.49 Kbytes
Page   19 Pages
Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory
Description 2GB Registered DDR SDRAM DIMM

EBD21RD4ABNA Datasheet (PDF)

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EBD21RD4ABNA Datasheet PDF - Elpida Memory

Part # EBD21RD4ABNA
Download  EBD21RD4ABNA Click to download

File Size   177.49 Kbytes
Page   19 Pages
Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory
Description 2GB Registered DDR SDRAM DIMM

EBD21RD4ABNA Datasheet (HTML) - Elpida Memory

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EBD21RD4ABNA Product details

Description
The EBD21RD4ABNA is a 256M words × 72 bits, 2 bank Double Data Rate (DDR) SDRAM Module, mounted 36 pieces of DDR SDRAM sealed in TCP 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 2-bit prefetch-pipelined architecture. Data strobe (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 utilizing surface mount technology. Decoupling capacitors are mounted beside each TCP on the module board.

Features
• 184-pin socket type dual in line memory module (DIMM)
   - PCB height: 30.48mm
   - Lead pitch: 1.27mm
• 2.5V power supply
• Data rate: 266Mbps/200Mbps (max.)
• 2.5 V (SSTL_2 compatible) I/O
• Double Data Rate architecture; two data transfers per clock cycle
• Bi-directional, data strobe (DQS) is transmitted
   /received with data, to be used in capturing data at
   the receiver
• Data inputs and outputs are synchronized with DQS
• 4 internal banks for concurrent operation (Component)
• DQS is edge aligned with data for READs; center
   aligned with data for WRITEs
• Differential clock inputs (CK and /CK)
• LL aligns DQ and DQS transitions with CK transitions
• Commands entered on each positive CK edge; data
   referenced to both edges of DQS
• Auto precharge option for each burst access
• Programmable burst length: 2, 4, 8
• Programmable /CAS latency (CL): 2, 2.5
• Refresh cycles: (8192 refresh cycles /64ms)
   - 7.8µs maximum average periodic refresh interval
• 2 variations of refresh
   - Auto refresh
   - Self refresh
• 1 piece of PLL clock driver, 1 piece of register driver
   and 1 piece of serial EEPROM (2k bits EEPROM) for
   Presence Detect (PD)




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