EDE2516ABSE-GE-E datasheet(1/66 Pages) ELPIDA

Part #	EDE2516ABSE-GE-E

Description	256M bits DDR2 SDRAM for HYPER DIMM

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Manufacturer	ELPIDA [Elpida Memory]

Direct Link	http://www.elpida.com/en

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Document No. E0657E20 (Ver. 2.0)

Date Published May 2005 (K) Japan

Printed in Japan

URL: http://www.elpida.com

Elpida Memory, Inc. 2005

PRELIMINARY DATA SHEET

256M bits DDR2 SDRAM

for HYPER DIMM



EDE2508ABSE-GE (32M words

× 8 bits)

EDE2516ABSE-GE (16M words

× 16 bits)

Description

The EDE2508ABSE is a 256M bits DDR2 SDRAM

organized as 8,388,608 words

× 8 bits × 4 banks.

It is packaged in 60-ball FBGA (

µBGA) package.

The EDE2516ABSE is a 256M bits DDR2 SDRAM

organized as 4,194,304 words

× 16 bits × 4 banks.

It is packaged in 84-ball FBGA (

µBGA) package.

Features

• Power supply: VDD, VDDQ = 1.85V ± 0.1V

• 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

• DQS is edge aligned with data for READs: center-

aligned 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

• Four internal banks for concurrent operation

• Data mask (DM) for write data

• Burst lengths: 4, 8

• /CAS Latency (CL): 5

• Auto precharge operation for each burst access

• Auto refresh and self refresh modes

• Average refresh period

 7.8µs at 0°C ≤ TC ≤ +85°C

 3.9µs at +85°C < TC ≤ +95°C

• SSTL_18 compatible I/O

• 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

• Programmable RDQS, /RDQS output for making × 8

organization compatible to

× 4 organization

• /DQS, (/RDQS) can be disabled for single-ended

Data Strobe operation.

• FBGA (µBGA) package with lead free solder

(Sn-Ag-Cu)

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EDE2516ABSE-GE-E Datasheet(PDF) 1 Page - Elpida Memory

EDE2516ABSE-GE-E Datasheet(HTML) 1 Page - Elpida Memory

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