In early August, Elpida had announced that 2Gbit memory chips manufactured using the 25nm process formally began shipping. Today, the company formally announced that the 4Gbit DDR3 SDRAM chips manufactured using the 25nm new process have been developed and the chip area is the smallest among the similar products (4Gbit DRAM particles). The new memory chip model is EDJ4104BCBG/EDJ4108BCBG, with a bit width of 4bit/8bit respectively. Elpida said that compared to its previous 30nm process 4Gbit DDR3 memory chips, the number of chips that can be cut from a single wafer has increased by 45%. Great reduction in production costs. At the same time, the current value during operation and standby is reduced by 25-30% and 30-50%, respectively, and the maximum transmission speed can reach over 1866Mbps (ie, the memory frequency of this particle is made up to 1866MHz), the default voltage is 1.5V, and there is low Voltage 1.35V version.
Elpida said that the new memory chips will begin trial production in December this year, and it is expected that it will begin mass production and shipments in the same month.
A communication Cable Assembly is a Wire Harness used to transmit signals. A communication cable consists of a plurality of mutually insulated wires or conductors to form a cable core, with a communication line with a sealing sheath on the outside. Some are also equipped with an outer sheath outside the sheath. There are various laying methods such as overhead, direct burial, pipeline and underwater. According to the structure, it is divided into symmetrical, coaxial and integrated cables; according to functions, it is divided into field and permanent cables (underground and submarine cables). The communication cable has a wider transmission frequency band, a larger communication capacity, and less external interference, but it is not easy to repair. It can transmit phone calls, telegrams, data and images, etc.
Communication cable assembly can be classified mainly by cable types and applications
According to the type of cable, communication cables are classified as follows:
1. Single-conductor: refers to the most primitive communication cable, a single-conductor loop, with the earth as the regression line.
2. Symmetrical cable: a loop composed of two identical conductors under ideal conditions.
3. Coaxial cable: The inner and outer conductors on the same axis form a loop, the outer conductor surrounds the inner conductor, and the two are insulated at the same time.
Then they are classified according to the application as follows:
1. Long-distance cable: The transmission distance is long, and it is generally multiplexed. Most of them are directly buried in the ground. In a few cases, they are installed overhead or installed in pipelines.
2. Cables in the city: the wires in the cable are "paired and paired", and the number of pairs is large. Generally installed in the pipeline, a small number of urban cables are attached to the building or installed overhead.
3. Office cable: mainly refers to the communication cable used in the telecommunications office, generally installed on the distribution frame, and some are installed in the wiring trough; the office cable is used between the transmission equipment and the switching equipment in the telecommunications office, and other Inside of intra-office equipment. In order to prevent fire inside the telecommunication bureau, it is sometimes necessary to add a flame retardant sheath to the bureau cable.
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