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Model: W971G6JB-18

Brand: WINBOND  

Type: original spot lot number: NEW + Rohs

Quantity: 52100 package: BGA

Price: Inquiry Sample: Specification: Contact Customer Service

Description: DDR2 SDRAM
  • W971GG6JB-18
    Manufacturer: Winbond
    Product category: DDR2 SDRAM
    RoHS: Details
    Installation Style: SMD/SMT
    Packaging/enclosure: BGA
    Series: W971GG
    Storage capacity: 64 Mbit
    Maximum clock frequency: 133 MHz
    Organization: 8 M x 8
    Timing type: Asynchronous
    Data Bus Width: 8 bit
    Power supply voltage - minimum: 2.7 V
    Power supply voltage - max: 3.6 V
    Power supply current - maximum: 25 mA
    Minimum operating temperature: - 40 C
    Maximum operating temperature: +85 C
    Packaging: Tube
    Trademark: Winbond
    Humidity sensitivity: Yes
    Product Type: DDR2 SDRAM
    Factory Packaging Quantity: 63
    Subcategory: Memory & Data Storage

    Winbond is committed to the production and design of memory products, including DRAM products group, memory IC manufacturing group and flash memory IC group. The main products of DRAM include Specialty DRAM, Pseudo SRAM and Low Power SDRAM Mobile RAM series products, which can be widely used in consumer, communication, computer periphery and automobile electronics. In addition, high-level DRAM-GDDR products are locked in personal computers, communications and other four areas. Market for games and multimedia applications. Flash memory products, focusing on low and medium density Parallel and Serial NOR Flash, are widely used in personal computers and peripherals, CD-ROMs, wireless networks, DSL data machines, DVD players, on-board boxes and TV sets.

    DDR2 SDRAM, referred to as DDR2, is the second generation of double data rate synchronous dynamic random access memory (Double-Data-Rate Two Synchronous Dynamic Random Access Memory), which is a computer memory specification. It belongs to the family of SDRAM memory products, provides the operating performance and lower voltage compared to DDR SDRAM higher, DDR SDRAM (double data rate synchronous dynamic random access memory) memory successor, products are also popular. It was developed by the JEDEC (electronic equipment Engineering Joint Commission).
    The editing of the structure and characteristics of DDR2
    The DDR2 memory has 240 pins (excluding the positioning slot), and the notebook‘s memory is 200 pins
    The DDR2 memory location slot is located between the sixty-fourth and sixty-fifth pins (the reverse is between the 184th and 185th pins).
    The DDR2 memory is encapsulated with FBGA (fine spacing ball grid array), which is characterized by the pin of the memory particle chip under the particle
    DDR2 memory needs 1.8V working voltage and 0.9V pull up voltage (data line)
    Each clock in the DDR2 memory can read and write data at a speed of 4 times the external bus, and can run at 4 times the speed of the internal control bus.
    DDR2 memory mainly uses switching power supply circuit, and a few voltage regulating modes are used.
    The definition editor of DDR2
    DDR2 (Double Data Rate SDRAM JEDEC (2) by the JEDEC standard) new generation memory technology development, it is the biggest and the generation of the DDR memory technology standard is different, although the same is the clock rising / falling basic data transmission delay at the same time, but the DDR2 memory but with more than two times the previous generation DDR memory prefetching capabilities (i.e. 4bit data read prefetching). In other words, each clock in DDR2 memory can read / write data at a speed of 4 times the external bus, and can run at 4 times the speed of the internal control bus.
    In addition, due to the DDR2 standard all DDR2 memory using FBGA package, TSOP/TSOP-II package and different forms are widely used in the FBGA package can provide more electrical performance and good heat dissipation, stable working frequency DDR2 memory and the future development to provide a solid foundation. Recalling the development course of DDR, from the first generation application to personal computer by DDR266, DDR333 to DDR200 dual channel DDR400 technology today, the development of the first generation of DDR technology has reached the limit, has been difficult to improve the memory speed by conventional way; with the development of the new Intel processor technology, front-end requirements on the bus the memory bandwidth is more and more high, have a higher and more stable operating frequency of the DDR2 memory is represent the general trend.
    New technology used by DDR2
    In addition to the differences mentioned above, DDR2 has introduced three new technologies, which are OCD, ODT, and Post CAS.
    OCD (Off-Chip Driver): the so-called offline driver adjustment, DDR II can improve the integrity of the signal through OCD. DDR II equals the voltage by adjusting the resistance value of the pull-up / drop-down (pull-down). Use OCD to improve the integrity of the signal by reducing the tilt of the DQ-DQS; improve the signal quality by controlling the voltage.
    ODT:ODT is the end of the inner core resistor. We know that using the main board of DDR SDRAM to prevent data line terminal reflection signals requires a lot of end resistance. It greatly increases the manufacturing cost of the motherboard. In fact, for different memory modules to end circuit is not the same, the end resistance determines the size of the signal data line ratio and reflectivity, end resistance small data line signal reflection but low signal-to-noise ratio is low; the end of the data line is high resistance, high signal-to-noise ratio, but also reflected signal increase. Therefore, the end resistance on the main board can not match the memory module very well, and will also affect the quality of the signal to a certain extent. The DDR2 can build the appropriate end resistance according to its own characteristics so that the best signal waveform can be guaranteed. The use of DDR2 can not only reduce the cost of the motherboard, but also get the best signal quality, which is incomparable to the DDR.

    1: Because of the variety of models, the price and inventory quantity are updated. Please contact us before placing an order.
    2: When the buyer consults, please make it clear (complete model, package, quantity) so that we can quote in time.
    3: If the buyer orders without consulting in advance, if the goods cannot be delivered due to shortage or price increase, our company will not bear any responsibility and will make refund treatment.
    4: More than 1000 yuan free of freight (except for special commodities).
    5: The quotation does not include any sales tax. For calculating the price with tax, Please add tax point.
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