Winbond > Part Catalog/ Specialty DRAM > DDR2 SDRAM

DDR2 SDRAM

Double Data Rate Two Synchronous Dynamic Random-Access-Memory (DDR2 SDRAM) has double performance of DDR SDRAM, which improves significantly the performance of computer data processing.

Serial No.	Memory Type	Density	Voltage	Frequency	Temperature	MP Application
W9712G6KB	DDR2 SDRAM	128Mb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W971GG6NB	DDR2 SDRAM	1Gb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~105°C, -40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W971GG8NB	DDR2 SDRAM	1Gb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~105°C, -40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W9725G6KB	DDR2 SDRAM	256Mb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W972GG6KB	DDR2 SDRAM	2Gb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~105°C, -40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W9751G6NB	DDR2 SDRAM	512Mb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial
W9751G8NB	DDR2 SDRAM	512Mb	1.7~1.9V	333MHz, 400MHz, 533MHz	-40°C~105°C, -40°C~95°C, 0°C~85°C	Automotive, Industrial, Commercial

What is DDR2 SDRAM?

DDR2 SDRAM can provides higher bandwidth to improve performance than DDR.

Because the prefetch of DDR2 is 4bit which is higher than DDR(prefetch is 2bit).

That’s the reason DDR2 can provide double performance due to it increasing the I/O clock.

What are the benefits of Winbond DDR2 SDRAM?

Higher performance:

While DDR2 SDRAM has 4bit prefetch that is higher than DDR(prefetch is 2bit), double performance can be provided by the protocol.

Compared to the standard DDR SDRAM, DDR2 SDRAM can work with faster CPUs to provide better performance, making the system more efficient.

Winbond DDR2 SDRAM can provide a frequency up to 533MHz.

Build in the new function OCD(Off-Chip Driver) and ODT(On-Die Termination):

The main function of OCD is to adjust the voltage of the I/O interface, it compensates the resistor values of pull-up and pull-down. Adjust the synchronization between DQS and DQ to ensure signal integrity and reliability.

ODT is the relocation of the terminal resistance to the inside of the chip, eliminating the need for a terminal circuit on the board. This allows the signal to be absorbed by the termination circuit without forming reflections on the circuit, which would otherwise affect the back-end signal. It also saves cost and circuit space.

What applications are suitable for DDR2 SDRAM?

DDR2 SDRAM is a widely used memory technology that can be applied to various types of computers and electronic devices to improve their performance and responsiveness.

E.g.

As a memory of the board in Industrial equipment: DDR2 SDRAM is used to support running programs and data, in order to increase the computer's operation speed and performance.

As a memory of Automotive: like car media system or car control units, it can increase the speed and performance.

As a memory for Switch /Router and Networking devices: to increase the data processing and response speed.

As a memory of Consumer products: to increase the data processing speed and performance in general purpose.