DSP, Micros & Memory


Interface solution for advanced DDR

17 July 2002 DSP, Micros & Memory

Pericom has introduced a complete solution of high-performance devices for DDR (double data rate) memory module applications. The family includes PLL clock drivers, registered buffers, and FET bus switches. The new DDR device family is targeted primarily at fast-growing markets such as servers, workstations, and high-end PCs.

Pericom's devices for DDR DIMM's (dual-in-line memory modules) include a 1:1 register, two 1:2 registers, a 1:10 PLL clock driver, and FET bus switches. These performance components support the 1-bank Planar DIMM, stacked double-sided DIMM, as well as the 1U DIMM where board real estate space is at a major premium.

The PLL clock driver is for synchronisation between input clock signals from a motherboard and to all SDRAMs, while the registers are for amplifying bus signals. FET switches are used for on-board DIMM module isolation.

The current JEDEC models of DDR modules are PC1600 (DDR200), PC2100 (DDR266) and the new PC2700 (DDR333) with frequency speeds of two times 100 MHz, 133 MHz, and 167 MHz respectively, all of which the company supports.



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