Winbond > Part Catalog/ Mobile DRAM > Low Power DDR2 SDRAM

Low Power DDR2 SDRAM

While DDR allows for faster data transfer than SDR, the improved performance usually translates into higher power consumption. Therefore, Winbond's Low Power DDR2 SDRAM is designed to work at low power consumption without compromising performance.

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

What is Low Power DDR2 SDRAM?

Although LPDDR and LPDDR2 memories are optimized in power consumption for mobile applications, LPDDR2 has significant improvements over LPDDR. Faster data transfer rates and also more options of density.

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 increase the I/O clock. Data transfer is realized on both the rising and falling edges of the clock signal. Thus Low Power DDR2 SDRAM provides higher bandwidth to improve performance without changing clock frequency.

Comparison table between Winbond Low Power DDR and Winbond Low Power DDR2

What are the benefits of Winbond Low Power DDR2 SDRAM?

Low power DDR2 SDRAM is improved for power consumption to be more suitable for mobile applications. :

Compared with standard DDR2, Low power DDR2 has more strong features of power saving in active power and standby power usage to increase battery life.

For various scenarios and applications, Winbond has established different power-saving modes such as Power-down mode, Deep power-down mode, and even a Programmable output buffer driving strength mechanism for flexible adjustment.

Besides these features, Winond Low Power DDR2 SDRAM has specific power-saving features like…   

Partial-Array Self-Refresh Mode (PASR):

Winbond Low Power DDR2 SDRAM integrates a crucial power-saving mechanism in the form of the Partial-Array Self-Refresh (PASR) sequence. With PASR technology, the memory can be refreshed on a per-bank basis, rather than whole fresh. In this mode, the memory can preserve critical data only to reduce the overall power consumption. This ensures only data necessary to an active computing process is refreshed.

Auto Temperature Compensated Self Refresh (ATCSR):

This feature involves embedding temperature sensors in the memory. Since refreshing the memory will cause its temperature to rise, continuous refreshing will inevitably increase power consumption. Therefore, the ATCSR helps memory chips by automatically reducing the frequency of refreshing when the memory temperature exceeds a pre-set value, giving the memory a chance to cool down and improving power efficiency.

What applications are suitable for Low Power DDR2 SDRAM?

Low Power DDR2 SDRAM is a high-performance, low-power memory technology that is suitable for use in handheld devices and mobile devices that require long-term operation and battery life. It is suitable for use in the following application:

Handheld, Smartphones, and tablets:

These devices require a long-term operation, and Low Power DDR2 SDRAM can provide longer battery life while achieving high-speed data transmission and processing.

Camcorders and Surveillance:

It can support high-speed image and video processing, which is required for photography and videography.

Automotive and embedded systems:

Low Power DDR2 SDRAM can handle high-speed data processing and storage applications in automotive systems, such as autonomous driving, intelligent safety systems, and entertainment systems.

IoT devices:

In recent years, the IoT applications have a significant transformation. Rather than simply analyzing data from endpoint sensors or edge devices, it has evolved to provide real-time interfaces. This new paradigm, referred to as AIoT, has the potential to significantly reduce system response times and overall power consumption. Related products have already appeared in a variety of contexts, including smart speakers, smart doorbells, and smart manufacturing. Low Power DDR2 SDRAM has also emerged as a pivotal technology in the AIoT ecosystem. Its small form factor, high bandwidth, and low power consumption make it a perfect fit for AIoT computing.