Chips Support Double Data Rate SDRAM Memory Modules

March 1, 1999
Three new support chips have been developed for use with double data rate (DDR) SDRAM memory modules- DDR SDRAMs are differentially clocked and include an on-chip DLL and SSTL_2 interface that permit a peak bus bandwidth of more than double that

Three new support chips have been developed for use with double data rate (DDR) SDRAM memory modules- DDR SDRAMs are differentially clocked and include an on-chip DLL and SSTL_2 interface that permit a peak bus bandwidth of more than double that available on 100-MHz SDRAMs. The first of the DDR support chips to be sampled by the firm is the SSTL 16857, a 14-bit SSTL_2 registered driver with differential clocks housed in a 48-pin TSSOP package. With a typical DDR memory module requiring from 23 to 27 registered control and address lines, two SSTL 16857 devices are required on each memory module card. And in order to synchronize signals on the individual memory chips, a PCK857 PLL is also required on each memory module. The PCK857 is a 150-MHz differential 1:10 SDRAM clock driver in a 48-pin TSSOP package. Also available to DIMM vendors are memory interfaces for industry standard SDRAM technologies, such as PC-100 and PC-133.

Company: PHILIPS SEMICONDUCTORS INC.

Product URL: Click here for more information

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!