The next characters define the DRAM generation and voltage. In “40A,” the “40” indicates DDR4 SDRAM. (For DDR3, this would be “41” or “8K”; for DDR5, newer prefixes like “60B” appear). The “A” denotes the specific version or design family, often linked to voltage—for example, “A” typically signifies 1.2V VDD/VDDQ for DDR4. This field is critical because mixing voltages can destroy components.

No decoder is perfect. Micron occasionally releases “custom” part numbers for large OEMs (e.g., Apple or Cisco) that deviate from standard fields. Additionally, newer products like HBM (High Bandwidth Memory) or CXL-attached memory have different numbering schemes. The decoder also does not reveal all specifications—for example, row/column addresses, internal bank groups, or refresh requirements must be looked up in the datasheet using the decoded part number as a key.

: The decoder covers a wide range of Micron products, including DRAM (DDR4, DDR5), NAND Flash, and SSD components. Ease of Use

Micron Memory Part Number Decoder [repack] Jun 2026

The next characters define the DRAM generation and voltage. In “40A,” the “40” indicates DDR4 SDRAM. (For DDR3, this would be “41” or “8K”; for DDR5, newer prefixes like “60B” appear). The “A” denotes the specific version or design family, often linked to voltage—for example, “A” typically signifies 1.2V VDD/VDDQ for DDR4. This field is critical because mixing voltages can destroy components.

No decoder is perfect. Micron occasionally releases “custom” part numbers for large OEMs (e.g., Apple or Cisco) that deviate from standard fields. Additionally, newer products like HBM (High Bandwidth Memory) or CXL-attached memory have different numbering schemes. The decoder also does not reveal all specifications—for example, row/column addresses, internal bank groups, or refresh requirements must be looked up in the datasheet using the decoded part number as a key. micron memory part number decoder

: The decoder covers a wide range of Micron products, including DRAM (DDR4, DDR5), NAND Flash, and SSD components. Ease of Use The next characters define the DRAM generation and voltage