JEDEC Prepares SPHBM4 Standard to Deliver HBM4-Level Throughput with Reduced Pin Count

ARLINGTON, Va.--(BUSINESS WIRE)--JEDEC Solid State Technology Association, the global leader in standards development for the microelectronics industry, today announced it is nearing completion of a new standard for Standard Package High Bandwidth Memory (SPHBM4). SPHBM4 devices are similar to the HBM4 devices commonly used in artificial intelligence accelerators, using the same DRAM dies on a new interface base die which can be mounted on standard organic substrates. In contrast, HBM4 is typically mounted on silicon substrates.

As planned, SPHBM operates at the same aggregate data throughput as HBM4 using fewer pins by operating at a higher frequency. Where the HBM4 interface has 2048 data signals, when published, SPHBM4 will define 512 data signals with 4:1 serialization to achieve the same bandwidth. This change allows the relaxed bump pitch required for connection to organic substrates.

Since SPHBM4 uses the same memory core layers as HBM4, total memory capacity per stack capability is identical. However, an added benefit of organic substrate routing is a longer supported channel length from the SoC to the memory, potentially increasing the total number of SPHBM stacks and therefore total memory capacity.

Stay tuned for more updates and details when SPHBM4 standard is published. For access to pre-publication proposals and early insights into active projects such as SPHBM4, consider joining JEDEC as a member company. Discover the benefits of membership and join today.

“JEDEC members are actively shaping the standards that will define next generation modules for use in AI data centers, driving the future of innovation in infrastructure and performance,” said Mian Quddus, Chairman of the JEDEC Board of Directors.

JEDEC standards are subject to change during and after the development process, including disapproval by the JEDEC Board of Directors.

About JEDEC

JEDEC is the global leader in the development of standards for the microelectronics industry. Thousands of volunteers representing over 380 member companies work together in more than 100 JEDEC committees and task groups to meet the needs of every segment of the industry, for manufacturers and consumers alike. The publications and standards generated by JEDEC committees are accepted throughout the world. All JEDEC standards are available for download from the JEDEC website. For more information, visit https://www.jedec.org.