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18.29mm DDR2 DIMM module suits low-height apps

Posted: 17 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:While Electronic? 2GB DDR2 SDRAM DIMM? memory module?

White Electronic Designs Corp. has launched its latest 2Gbyte DDR2 SDRAM DIMM with PLL providing a board height of 18.29mm. The new JEDEC-standard DDR2 DIMM is aimed at low-height blade servers, network switching or embedded computer applications.

The very low profile 2Gbyte DDR2 ECC-registered DIMM is a 2x128Mx72 double data rate (DDR) SDRAM high-density module based on DDR2 SDRAM components. The module consists of 18 stacks of 256Mx4bit with 4 banks DDR2 SDRAMs in Fine BGA (FBGA) packages on a 240-pin DIMM FR4 substrate.

The unit features dual in-line memory with data transfer rates of PC2-4300 and PC2-3200, utilizing 533Mbps and 400Mbps DDR2 SDRAM components. It offers multiple internal device banks for concurrent operation and supports duplicate output strobe. The 18.29mm device meets low-height requirements by enabling vertical installation, providing increased airflow and allows for additional memory slots.

Utilizing FBGA packaging enables higher speed memory requirements and moves the device connections from metal leads along the side of the device to ball connections on the underside of the device. This enables connections with shorter line lengths from the actual packaged semiconductor die, versus using TSOP. All DDR2 modules are RoHS compliant.

The 2Gbyte DDR2 SDRAM (W3HG2128M72ACER-AD6) is priced at $445 each in volumes of 1,000 pieces with a lead-time of 4-6 weeks.

- Marty Gold

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