Dual In-line Memory Module


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Dual In-line Memory Module

(storage)
Small circuit boards carrying memory integrated circuits, with signal and power pins on both sides of the board, in contrast to single-in-line memory modules (SIMM).

The individual gold or lead connectors (pins) on SIMMs, although they are on both sides of the chip, are connected to the same memory chip, while on a DIMM, the connections on each side of the module connect to different chips. This allows for a wider data path, as more modules can be accessed at once. DIMM pins are arranged in a zigzag design to allow PCB tracks to pass between them.

The 8-byte DIMM format with dual-sided contacts can accommodate 4- and 16-megabit dynamic RAM chips, and is predicted to handle 64- and 256-Mbit devices. The 8-byte DIMM will hold up to 32 megabytes of memory using 16-Mbit DRAMs, but with the 256-Mbit future-generation DRAM, it will be able to hold a 64-Mx64 configuration. Another variation, the 72-pin SO-DIMM, is designed to connect directly to 32 bit data buses, and is intended for use in memory-expansion applications in notebook computers.

A Dual in-line memory module (DIMM), as opposed to SIMMs (used by the majority of the PC industry) allows for a 128-bit data path by interleaving memory on alternating memory access cycles. SIMMs on the other hand, have a 64-bit data path. Suppliers are unanimous in their belief that the DIMM will eventually replace the SIMM as the market's preferred memory module.
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References in periodicals archive ?
NASDAQ:IDTI), a leading provider of vital semiconductor solutions, today announced the industry's fastest JEDEC-compatible integrated register and phase-locked loop (PLL) for DDR3 registered dual in-line memory modules (RDIMMs).
2V 2 gigabyte (2GB) DDR4 unbuffered dual in-line memory modules (UDIMM) to a controller maker for testing.
Elpida Memory, Inc (Elpida) has announced volume production of its 512 Megabit-based 2 Gigabyte DDR2 registered dual in-line memory modules (DIMMs).
IDT([R])) (NASDAQ:IDTI), a leading provider of essential mixed signal semiconductor solutions that enrich the digital media experience, today extended its leadership in the memory interface market by announcing a next-generation integrated register and phase-locked loop (PLL) for DDR3 registered dual in-line memory modules (RDIMMs).
Providing hot-replace and hot-add capabilities, HP RAID memory uses a redundant array of industry-standard dual in-line memory modules to provide fault tolerance and the ability to expand memory capacity without downtime.
The TPS51200 also complements TI's broad portfolio of DDR, DDR2 and DDR3 phase-locked loops (PLLs) and LDOs for memory technologies, including the SN74SSQE32882, PLL integrated DDR3 register for registered dual in-line memory modules, which is available in full production.
The IDT SSTE32882HL device is a Joint Electron Device Engineering Council (JEDEC)-compliant integrated register and phase-locked loop (PLL) for DDR3 registered dual in-line memory modules (RDIMMs).
7 /PRNewswire/ -- Texas Instruments (TI) today introduced the industry's first fully-integrated register and phase-locked loop (PLL) for DDR3 registered dual in-line memory modules (RDIMMs).
In the Memory Community TI will display its advanced memory support solutions, and TI experts will provide information on high-speed memory module support products, including advanced memory buffers for fully-buffered dual in-line memory modules (FB-DIMM).
The new CoreDDR controller, which is optimized for Actel's antifuse-based Axcelerator and RTAX-S FPGAs, supports standard SDRAM chips and dual in-line memory modules (DIMMs) with up to 1024 Mbytes of memory and up to eight chip selects.
Compliant with the JEDEC AMB specifications, the IDT AMB+ device is an essential building block in Fully Buffered Dual In-line Memory Modules (FB-DIMM) for high-performance, low-power computing platforms.
Consequently, x16 and x32 DDR SDRAMs at 200 MHz and 250 MHz are becoming the memory of choice for cache and packet storage, while network main memory is utilizing 166 MHz DDR in dual in-line memory modules (DIMMs).