New line of mobile LPDDR2 SDRAMs increases battery life in portable electronics
Subs & Systems
Alliance Memory has introduced a new line of high-speed CMOS mobile low-power DDR2 (LPDDR2) SDRAMs with densities of 1Gb, 2Gb, and 4Gb in the 134-ball FBGA package. The devices offer a variety of power-saving features, including 1.2V/1.8V operating voltages, to extend battery life in portable electronics, while their high density enables ultra-slim designs.
The LPDDR2 SDRAMs released today provide reliable drop-in, pin-to-pin compatible replacements for a number of similar solutions in ultra-low-voltage cores and I/O power supplies for mobile devices such as smartphones and tablets. For these products, the ICs feature auto temperature-compensated self-refresh (TCSR) to minimize power consumption at lower ambient temperatures. In addition, their partial-array self-refresh (PASR) feature reduces power by only refreshing critical data, while a deep power down (DPD) mode provides an ultra-low power state when data retention isn't required.
Featuring a double data rate four-bit prefetch architecture, the LPDDR2 SDRAMs deliver high-speed operation with clock rates of 400MHz and 533MHz, and are available in commercial (-30C to +85C) and industrial (-40C to +85C) temperature ranges. The devices offer programmable read or write burst lengths of 4, 8, or 16; an auto pre-charge function provides a self-timed row pre-charge initiated at the end of the burst sequence. Easy-to-use refresh functions include auto- or self-refresh. The RoHS-compliant ICs are lead (Pb)- and halogen-free.