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Model: K4T1G164QG-BCE7

Brand: SAMSUNG  

Type: original      quantity: 47520

Package: BGA    batch number: 19+ROHS

Price: enquiry     sample: support     specification: contact customer service.

Description: DRAM Chip DDR2 SDRAM 1Gbit 64Mx16 1.8V

  • K4T1G164QG-BCE7
    RoHS Version:2002/95/EC
    描述:DRAM Chip DDR2 SDRAM 1Gbit 64Mx16 1.8V
    Taxonomy:Memory » Memory Chips » DRAM Chip
    Supplier Cage Code:1542F

    Samsung Group is the largest multinational enterprise group in South Korea, and it is also the top 500 of the listed companies. SamSung group includes a large number of international subordinates. The SamSung group includes Samsung Electronics, Samsung, Samsung, and Samsung Life Insurance. The business involves electronic, financial, mechanical, chemical and other fields. Leading storage series FLASH/DRAM/SDRAM/DDR/EMMC and ARM.

    DDR2 SDRAM for short, DDR2 is the second generation double data rate synchronous dynamic random access memory (Double-Data-Rate Two Synchronous Dynamic Random Access Memory), and is a kind of computer memory specification. It belongs to the SDRAM family of memory products, provides a higher operating efficiency and lower voltage than the DDR SDRAM, and is the successor to the DDR SDRAM (double data rate synchronous dynamic random access memory), and is also a current popular memory product. It is developed by JEDEC (Joint Committee on electronic equipment Engineering).
    DDR2 (Double Data Rate 2) SDRAM is a new generation of new generation memory technology standard developed by JEDEC (electronic equipment Engineering Joint Committee). It is different from the previous generation of DDR memory technology standard, although it is the same as the basic way to transmit data at the same time with the rise / drop delay of the clock, but the DDR2 memory is embraced. It has two times the memory readability of the previous generation of DDR (that is, 4bit data read prefetching). In other words, DDR2 memory per clock can read / write data at a speed of 4 times the external bus, and it can run 4 times as much as the internal control bus.
    In addition, as the DDR2 standard stipulates that all DDR2 memory is used in the form of FBGA encapsulation, and different from the widely used TSOP/TSOP-II packaging form, FBGA package can provide better electrical performance and heat dissipation, which provides a solid foundation for the stable work of DDR2 memory and the development of the future frequency. Recalling the development of DDR, from the first generation to the personal computer‘s DDR200 through DDR266, DDR333 to today‘s dual channel DDR400 technology, the development of the first generation of DDR has also reached the limit of the technology. It has been difficult to improve the working speed of memory by conventional methods; with the development of the latest Intel processor technology, the front bus is The requirement of memory bandwidth is higher and higher, and DDR2 memory with higher and more stable operation frequency will be the trend of the times.
    New technology used by DDR2
    In addition to the above differences, DDR2 has introduced three new technologies: OCD, ODT and Post CAS.
    OCD (Off-Chip Driver): also known as off-line drive adjustment, DDR II can improve signal integrity through OCD. DDR II adjusts the voltage between them by adjusting the resistance value of pull-up / pull-down. Using OCD to improve signal integrity by reducing DQ-DQS‘s tilt, the signal quality is improved by controlling voltage.
    ODT:ODT is the end of the inner core resistor. We know that the main board using DDR SDRAM requires a large number of termination resistors to prevent data terminal reflection. It greatly increases the manufacturing cost of the motherboard. In fact, the requirements of different memory modules for the end circuit are different. The size of the end resistance determines the signal ratio and reflectivity of the data line, the small end resistance is low, but the signal to noise ratio is low; the signal to noise ratio of the data line is high, but the signal reflection will also increase. Therefore, the termination resistors on the motherboard can not match the memory module very well, but also affect the signal quality to a certain extent. DDR2 can build appropriate termination resistors according to its own characteristics, so that the best signal waveform can be guaranteed. Using DDR2 can not only reduce the cost of motherboard, but also get the best signal quality, which is unmatched by DDR.
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