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Frequently asked questions
DDR4 is backward compatible as far back as DDR3-1333. For systems that do not need speed increases above DDR3-1333 and DDR3-1600, DDR4 can support these slower bandwidth requirements with substantially lower power requirements.
DDR4 is produced in Micron fabs around the world, including Virginia, Japan, and Taiwan.
Not really; however, DDR4 does not require an external VREFDQ, but it does provide an internally generated VREFDQ that requires calibration by the DRAM controller.
Not exactly. DDR4 still uses VTT mid-point termination on the data bus for good signal quality, however it uses pseudo open-drain drivers for less switching current compared to full push-pull drivers.