DDR SDRAMs extend battery life in compact portable devices

Today, designers of portable devices are required to provide more functionality in less space while using less power. To meet this demand, Alliance's modules feature a number of power-saving functions. The modules are offered with an auto temperature compensated self-refresh function, which minimises power consumption at lower ambient temperatures. To further reduce power the modules also feature a partial array self-refresh function, which only refreshes critical data. When data retention is not required, the modules' deep power down function provides an ultra-low power state.

Offered in 8x9mm 60-ball and 8x13mm 90-ball FPBGA packages, the modules provide reliable drop-in, pin-for-pin-compatible replacements for a number of similar solutions in high-bandwidth, high-performance memory system applications. Such applications include those in portable consumer electronics, medical equipment and networking devices. 

Through their double data rate architecture, the modules provide high-speed operation with clock rates of 166 and 200MHz. The modules are available in both extended (-30 to +85°C) and industrial (-40 to +85°C) temperature ranges, allowing them to be used within extreme environments. Providing  programmable read or write burst lengths of 2, 4, 8, or 16, the modules offer fully synchronous operation. The modules, which are RoHS-compliant and lead (Pb)- and halogen-free, feature an auto pre-charge function which provides a self-timed row pre-charge initiated at the end of the burst sequence.