W3HG2128M72ACER-AD6

May 2006

Rev. 5

PRELIMINARY*

1

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

2GB – 2x128Mx72 DDR2 SDRAM REGISTERED, w/PLL, VLP

DESCRIPTION

The W3HG2128M72ACER is a 2x128Mx72 Double Data

Rate DDR2 SDRAM high density module based on DDR2

SDRAM components. This memory module consists

of eighteen stacks of 256Mx4 bit with 4 banks DDR2

Synchronous DRAMs in FBGA packages, mounted on a

240-pin DIMM FR4 substrate.

* This product is under development, is not qualified or characterized and is subject to

change without notice.

NOTE: Consult factory for availability of:

• Vendor source control options

• Industrial temperature option

• Parity function

FEATURES

240-pin, dual in-line very low profile (VLP) memory

module

Fast data transfer rates: PC2-6400*, PC2-5300*,

PC2-4300 and PC2-3200

Utilizes 800, 667, 533 and 400 Mb/s DDR2 SDRAM

components

Differential data strobe (DQS, DQS#) option

Four-bit prefetch architecture

DLL to align DQ and DQS transitions with CK

Multiple internal device banks for concurrent

operation

Supports duplicate output strobe (RDQS/RDQS#)

Programmable CAS# latency (CL): 3, 4, 5 and 6

Adjustable data-output drive strength

On-die termination (ODT)

Posted CAS# additive latency: 0, 1, 2, 3 and 4

Serial Presence Detect (SPD) with EEPROM

64ms: 8,192 cycle refresh

Gold edge contacts

ECC error detection and correction

Dual Rank

RoHS compliant

Package option

• 240 Pin VLP: 18.29mm (0.720") TYP

OPERATING FREQUENCIES

PC2-3200

PC2-4300

PC2-5300*

PC2-6400*

Clock Speed

200MHz

266MHz

333MHz

400MHz

3-3-3

4-4-4

5-5-5

6-6-6

* Consult factory for availability