JESD79-4D introduced enhancements like the Pseudo Open Drain (POD) interface and bank groups . Bank groups allow for faster data access by enabling simultaneous operations across different sets of banks. JESD79-4D vs. Later Generations
DDR4 SDRAM Standard Release Date: March 2014 (Revision D was a significant consolidation). jesd79-4d pdf
The standard provides a technical blueprint for DDR4 SDRAM (2 Gb through 16 Gb densities) . Key sections include: JESD79-4D introduced enhancements like the Pseudo Open Drain
The JESD79-4D PDF is an essential reference, but always get it from JEDEC directly. Register once, and you’ll also gain access to other standards like LPDDR4, DDR5, and HBM. jesd79-4d pdf