EBJ20RE4BAFA-AE-E datasheet(1/20 Pages) ELPIDA

Part #	EBJ20RE4BAFA-AE-E

Description	2GB Registered DDR3 SDRAM DIMM

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Manufacturer	ELPIDA [Elpida Memory]

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

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Document No. E1253E40 (Ver. 4.0)

Date Published December 2008 (K) Japan

Printed in Japan

URL: http://www.elpida.com

Elpida Memory, Inc. 2007-2008

DATA SHEET

2GB Registered DDR3 SDRAM DIMM

EBJ20RE4BAFA (256M words

× 72 bits, 1 Rank)

Specifications

• Density: 2GB

• Organization

 256M words × 72 bits, 1 rank

• Mounting 18 pieces of 1G bits DDR3 SDRAM sealed

in FBGA

• Package: 240-pin socket type dual in line memory

module (DIMM)

 PCB height: 30.5mm (max.)

 Lead pitch: 1.0mm

 Lead-free (RoHS compliant)

• Power supply: VDD = 1.5V ± 0.075V

• Data rate: 1333Mbps/1066Mbps/800Mbps (max.)

• Eight internal banks for concurrent operation

(components)

• Interface: SSTL_15

• Burst lengths (BL): 8 and 4 with Burst Chop (BC)

• /CAS Latency (CL): 6, 7, 8, 9

• /CAS write latency (CWL): 5, 6, 7

• Precharge: auto precharge option for each burst

access

• Refresh: auto-refresh, self-refresh

• Refresh cycles

 Average refresh period

7.8

µs at 0°C ≤ TC ≤ +85°C

3.9

µs at +85°C < TC ≤ +95°C

• Operating case temperature range

 TC = 0°C to +95°C

Features

• Double-data-rate architecture; two data transfers per

clock cycle

• The high-speed data transfer is realized by the 8 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; 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

• Posted /CAS by programmable additive latency for

better command and data bus efficiency

• On-Die-Termination (ODT) for better signal quality

 Synchronous ODT

 Dynamic ODT

 Asynchronous ODT

• Multi Purpose Register (MPR) for temperature read

out

• ZQ calibration for DQ drive and ODT

• Programmable Partial Array Self-Refresh (PASR)

• /RESET pin for Power-up sequence and reset

function

• SRT range:

 Normal/extended

 Auto/manual self-refresh

• Programmable Output driver impedance control

• 1 piece of registering clock driver and 1 piece of

serial EEPROM (256 bytes EEPROM) for Presence

Detect (PD)

• Class B temperature sensor functionality with

EEPROM

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