EBS21RC2ACNA Datasheet, PDF (1/15 Pages) Elpida Memory – 2GB Registered SDRAM DIMM

DATA SHEET
2GB Registered SDRAM DIMM
EBS21RC2ACNA (256M words × 72 bits, 2 banks)
Description
Features
The EBS21RC2ACNA is 256M words × 72 bits, 2
banks Synchronous Dynamic RAM Registered Module,
mounted 72 pieces of 256M bits SDRAM sealed in
TCP package. This module provides high density and
large quantities of memory in a small space without
utilizing the surface mounting technology. Decoupling
capacitors are mounted on power supply line for noise
reduction.
Note: Do not push the cover or drop the modules in
order to protect from mechanical defects, which
would be electrical defects.
• Fully compatible with 8 bytes DIMM: JEDEC
standard outline
• 168-pin socket type dual in line memory module
(DIMM)
 PCB height: 41.91mm (1.65inch )
 Lead pitch: 1.27mm
• 3.3V power supply
• Clock frequency: 133MHz (max.)
• LVTTL interface
• Data bus width: × 72 ECC
• Single pulsed /RAS
• 4 Banks can operates simultaneously and
independently
• Burst read/write operation and burst read/single write
operation capability
• Programmable burst length (BL): 1, 2, 4, 8
• 2 variations of burst sequence
 Sequential
 Interleave
• Programmable /CAS latency (CL): 2, 3
• Registered inputs with one clock delay
• Byte control by DQMB
• Refresh cycles: 8192 refresh cycles/64ms
• 2 variations of refresh
 Auto refresh
 Self refresh
• 1 piece of PLL clock driver, 3 pieces of register driver
and 1 piece of serial EEPROM (2k bits) for Presence
Detect (SPD) on PCB.
Document No. E0105E50 (Ver. 5.0)
Date Published June 2002 (K) Japan
URL: http://www.elpida.com
Elpida Memory, Inc. 2001-2002