Document No. E0087H40 (Ver. 4.0)

Date Published August 2002 (K) Japan

URL: http://www.elpida.com

Elpida Memory, Inc. 2001-2002

Hitachi, Ltd. 2000

Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.

DATA SHEET

512MB Unbuffered DDR SDRAM DIMM

×××× 64 bits, 2 Banks)

×××× 72 bits, 2 Banks)

Description

The HB54A5128FN, HB54A5129FN are Double Data

Rate (DDR) SDRAM Module, mounted 256M bits DDR

SDRAM (HM5425801BTT) sealed in TSOP package,

and 1 piece of serial EEPROM (2k bits EEPROM) for

Presence Detect (PD).

The HB54A5128FN is

organized as 32M

× 64 × 2 banks mounted 16 pieces

of 256M bits DDR SDRAM.

The HB54A5129FN is

organized as 32M

× 72 × 2 banks mounted 18 pieces

of 256M bits DDR SDRAM. 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

bits 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. An outline of the products is

184-pin socket type package (dual lead out).

Therefore, it makes high density mounting possible

without surface mount technology. It provides common

data inputs and outputs. Decoupling capacitors are

mounted beside each TSOP on the module board.

Features

• 184-pin socket type package (dual lead out)

 Outline: 133.35mm (Length) × 31.75mm (Height) ×

4.00mm (Thickness)

 Lead pitch: 1.27mm

• 2.5V power supply (VCC/VCCQ)

• SSTL-2 interface for all inputs and outputs

• Clock frequency: 143MHz/133MHz/125MHz (max.)

• Data inputs, outputs and DM are synchronized with

DQS

• 4 banks can operate simultaneously and

independently (Component)

• Burst read/write operation

• Programmable burst length: 2, 4, 8

 Burst read stop capability

• Programmable burst sequence

 Sequential

 Interleave

• Start addressing capability

 Even and Odd

• Programmable /CAS latency (CL): 2, 2.5

• 8192 refresh cycles: 7.8µs (8192/64ms)

• 2 variations of refresh

 Auto refresh

 Self refresh

This product became EOL in May, 2004.