Committed to Memory

Archive for 2014
 

Inside Samsung’s DDR4 Product Guide – DDR4-2400, 8Gb dies, TSV, and 128GB DIMMs

Samsung has posted their DDR4 product guide on their website, and it gives us excellent insight into the direction that Samsung plans to go with DDR4 in the next few months with a lot of data that wasn’t previously publicly available.

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Posted in DDR4, DIMM, DRAM Industry, Uncategorized

 

WOW That Was Fast – JEDEC Publishes the LPDDR4 Standard

JEDEC officially published the LPDDR4 standard today.  It is very impressive how quickly LPDDR4 was standardized given the comparably long time it took for DDR4 from start to publication.  That is primarily driven by the pace of the smartphone market and the need for increased memory bandwidth year over year which has far outpaced the memory bandwidth growth requirement in the “PC” SDRAM market.  The JEDEC committees responsible for this latest publication should be very proud of their achievement.  Most of the people on these committees have “regular day jobs” outside of JEDEC and the support from the various companies involved is also appreciated.

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Posted in DDR Controller, DDR PHY, LPDDR4

 

The Future of DRAM

A lot has been written about DDR SDRAMs, both the compute variety (DDR3/4) and the mobile variety (LPDDR3/4) and what may come after these technologies run their course.  One thing is certain; the future will not be an easy path for DRAMs.  The DDR protocol based on a wide parallel bus with single ended signaling and a source synchronous data strobe and non-embedded clock is not scalable beyond the data rates currently specified for these technologies.  After DDR4, the world will need something else as the DDR interface cannot realistically be expected to run at data rates higher than 3200Mbps in a traditional computer main memory environment.  Unfortunately, that something else will likely be “somethings” else.  Likewise, the smartphone’s insatiable need for higher bandwidth from main memory DRAM will also lead to a deviation from the wide parallel bus based DRAM.

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Posted in DDR3, DDR4, DRAM Industry, HBM, High Bandwidth Memory, HMC, Hybrid Memory Cube, IP, LPDDR3, LPDDR4, Signal Integrity, Wide I/O, Wide I/O2

 

When is LPDDR3 not LPDDR3? When it’s DDR3L…

For years, I have been predicting that Low-Power DDR (LPDDR) devices would make the crossover from mobile devices into laptops.

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Posted in DDR3, DRAM Industry, Featured, Low Power, LPDDR3