LPDDR4 to LPDDR4X: What is the difference?

Hello Memory Enthusiasts!  Please see here a guest post by the distinguished Patrick Moran  Thanks Pat for allowing the repost! LPDDR4 was introduced in 2014 about two years after LPDDR3. This was probably the fastest transition for a new generation memory ever in JEDEC history. New products and features being introduced into the mobile ecosystem requiring faster and lower power memory propelled the fast development. LPDDR4 succeeded in increasing maximum data rates from 1866 Mbps to 3200 Mbps. But active power results for initial products were disappointing since operating voltage was reduced by only 7%. The industry responded with LPDDR4X early in 2017. The ‘X’ stands for ‘eXtra’ or ‘eXtended’. It headlined lower I/O voltage to save system power and new features to kick the data rate from 3200 to 4266 Mbps. Today it has replaced the original LPDDR4 for new designs (LPDDR4 remains available for legacy systems.) Think of LPDDR4X as LPDDR4 done right. What makes a good LP DRAM and where did LPDDR4 come up short? Two things really – active power and standby power. Maximum active power occurs when the mobile device is operating at full speed, for example playing an action game, and includes memory device power and the power the system uses to operate the memory. An aggressive goal for a new generation of LP DRAM might be the same power at its full speed for the new generation LP DRAM. For example, a LPDDR4 at its max speed of 3200 Mbps might consume the same power as a LPDDR3 operating at its max speed of 1600 Mbps. The least aggressive goal would be that...

FS2600 R/LRDIMM

    FS2600 DDR5 RDIMM/LRDIMM Interposer exclusively for use with the Keysight U4164A logic analysis modules The fastest DDR capture tools in the industry…AGAIN! The FS2600 is our newest and fastest logic analyzer probe used to test DDR5 RDIMM and LRDIMM memory. It is designed to work exclusively with 4 Keysight U4164A logic analysis modules operating in either Quad Sample State or Quarter Channel 10GHz timing modes. This gives the user an extremely effective tool for debugging, testing and verifying DDR5 RDIMM/LRDIMMs and DDR5 Memory Channels. Interposer Design – The FS2600 DDR5 DIMM probe does not sacrifice a memory slot, so you can probe any RDIMM/LRDIMM, even in a fully populated memory bus. FS2601 DDR5 UDIMM Interposer pending JEDEC final pinout (Available NOW!) FS2602 DDR5 SODIMM Interposer pending JEDEC final pinout (Available NOW!) FS2605 DDR5 DIMM Satellite Interposer for Slot 2 same channel (Available NOW!) All signals are probed passively. Complete and accurate State analysis. Quarter Channel Timing mode provides deep 10GHz asynchronous sampling of all Data signals. Measure signal integrity of each bit on the DDR5 DIMM with Keysight EyeScan application. View Example Screenshot. Compatible with latest JEDEC RDIMM and LRDIMM pinout. Quick and easy interposer connection between the DDR5 RDIMM/LRDIMM memory bus connector and the U4164A Keysight logic analyzer module. Provides for both CHA and CHB full Data and Address/Command/Control decode. Short DDR5 probe etch length makes it more reliable in marginal systems. Note: FuturePlus has carefully simulated and designed this FS2600 probe to work in your system and it extends the DDR5 bus less than 1.0 inch. Other factors can have a significant effect on the...
Request More Information/Quote or Call: (603) 472-5905
Send
Request More Information/Quote or Call: (603) 472-5905
Send