White Electronic Designs
W3HG2128M72ACER-AD6
PRELIMINARY*
2GB – 2x128Mx72 DDR2 SDRAM REGISTERED, w/PLL, VLP
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
V
CC
= V
CCQ
= 1.8V
V
CCSPD
= +1.7V to +3.6V
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
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
OPERATING FREQUENCIES
PC2-3200
Clock Speed
CL-t
RCD
-t
RP
* Consult factory for availability
PC2-4300
266MHz
4-4-4
PC2-5300*
333MHz
5-5-5
PC2-6400*
400MHz
6-6-6
200MHz
3-3-3
May 2006
Rev. 5
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
