RE: Dec 2013

Seoul, December 30, 2013 – SK Hynix Inc. (or ‘the Company’, www.skhynix.com) announced that it has developed the world’s first 8Gb(Gigabit) LPDDR4(Low Power DDR4) using its advanced 20nm class technology. LPDDR4 is the next generation mobile DRAM interface on the process of standardization which features ultrahigh speed and low power consumption.

LPDDR4[edit]

On March 14, 2012, JEDEC hosted a conference to explore how future mobile device requirements will drive upcoming standards like LPDDR4.[14] On December 30, 2013, Samsung announced that it has developed the first 20 nm-class 8 Gigabit (1GB) LPDDR4 capable of transmitting data at 3,200 Mbit/s, thus providing 50 percent higher performance than the fastest LPDDR3 and consuming around 40 percent less energy at 1.1 volts.[15]

On Aug 25, 2014 JEDEC published the JESD209-4 LPDDR4 Low Power Memory Device Standard.[16]

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SK Hynix shares fall sharply after Samsung Elec chip ...

For the most part, from MDDR to LPDDR4, an evolution of dropping voltage issues from 2.5 to 1.1.... with various modifications to refresh issues.

It's still a capacitor-based memory requiring refresh. For traditional DRAM/SDRAM refresh was always in a constant cycle of refresh. For the new mobile RAM they have methodized ways to reduce refresh. Refresh issues are what eat up power .

e.g…methods reducing refresh…”Additional savings come from temperature-compensated refresh (DRAM requires refresh less often at low temperatures), “ eliminate heat generation

“partial array self refresh,” zone management of refresh circuitry an array being a zone of a memory

"and a "deep power down" mode which sacrifices all memory contents." Turning off the memory when not in use to conserve power….not new.

doni