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Pricing starts at $1,995 in single unit quantities. Detailed product information may be found here. In addition to standard products, PSPL also offers custom comb generators to meet specific input frequency range, output power, harmonic frequency roll-off, and form factor requirements. Please contact PSPL for additional information at or at (303) 209-8100.

0439141101_Molex_Rectangular Connectors - Housings

Pricing starts at $1,995 in single unit quantities. Detailed product information may be found here. In addition to standard products, PSPL also offers custom comb generators to meet specific input frequency range, output power, harmonic frequency roll-off, and form factor requirements. Please contact PSPL for additional information at or at (303) 209-8100.

How quickly things have changed. Two to three years ago, DRAM makers were downtrodden, desperate and still suffering flashbacks to the ultimately unsuccessful transition to Rambus DRAM. They tried any marketing gimmick to persuade systems makers and consumers that even a jump from 266-MHz to 333-MHz DDR would result in awe-inspiring performance increases on the desktop.

Rambus lingered so long partly because Intel had thrown its considerable market weight behind it, stubbornly sticking with the Pentium 4 and introducing its i845 chip set for DDR late in the transition cycle to that technology.

0439141101_Molex_Rectangular Connectors - Housings

Now Intel is aggressively backing DDR2: Over the next two quarters, the company is expected to ship five chip sets that support it: the previously announced Grantsdale, Alderwood, Lindenhurst, Tumwater and Alviso products. Initial chip sets will support the 400- and 533-MHz versions of DDR2. DRAM vendors have 667-MHz versions in the works as a prelude to the eventual transition to DDR3.

The jury's out on how much Intel's support will influence the course and timing of the DDR2 shift. Market watcher iSuppli Corp. believes DDR2 is unlikely to establish a mainstream presence in the market this year. It further suspects the transition will be much more difficult than the previous migrations from extended-data-out to synchronous DRAM and then from SDRAM to DDR.

But Samsung thinks the coming transition will be the fastest one ever, Elliott said, because this time everybody is moving in the same direction.”

0439141101_Molex_Rectangular Connectors - Housings

Elliott also cited a short ramp to price parity between DDR1 and DDR2 technologies. Parity will occur in 2005, roughly 12 to 18 months after the launch of the technology, he said.

Samsung is shipping 512-Mbit DDR2 SDRAMs based on its new 100-nm process and is sampling a 1-Gbit version. The chips are fabricated at Samsung's 300-mm fab in Hwaseong, South Korea.

0439141101_Molex_Rectangular Connectors - Housings

Intel has validated that products from Samsung, Micron, Infineon, Hynix and Elpida support its DDR2 chip sets, according to Geof Findley, business development manager of platform memory operations at Intel. We are in the ramping stage for DDR2 400/533,” Findley said. The ecosystem is healthy and ready.”

Triple target

The notebooks/PCs continued to incorporate the switches for multiplexing applications that includes overlaying graphics onto video (Picture-In-Picture), switching of MPEG data streams (after the serial-parallel conversion) and then the multiplexing of the RGB data between different monitor sources (TV, LCD, PC monitor) on video accelerator cards.

In recent years consumers thirst for hi-tech features with multiple sources has pushed technology requirements such that the switch function is an integral part within the realm of video, graphics and audio transmission or processing. By doing this there are now significantly higher demands on the characteristics of the switches” with regard to crosstalk, Total Harmonic Distortion (THD), attenuation and bandwidth beyond simply RON and RFLAT characteristics. This has led to the migration to a family of products that we collectively recognize as analog switches.

Initially, the bus switch” technology was simply migrated to the smaller data bit widths since the RON resistance, RFLAT and 5V supply characteristics were adequate. The 10-75+ ohm switch characteristics were sufficient and we would design our systems, using audio amplifiers, to drive the speaker path impedances of several hundred to kohms. Power was also not necessarily a limiting issue. A 10-75 ohm series resistor into a relatively high impedance amplifier (>100k Ω) had little consequence for power transfer or signal attenuation since the amplifier gain compensates for any insertion loss. In addition, the relatively low capacitance of the switch does not significantly contribute to the non-linear harmonic distortion (THD).

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