Micron Memory Part Number Decoder

This section tells you the total capacity and the architecture of the memory.

Translation: The "1G72" combined with the "S" (RDIMM) usually points to an 8GB or 16GB module depending on the specific chip density used on the stick.

| Field | Code | Meaning | |-------|------|---------| | Base | MT40A | DDR4 SDRAM (40A = DDR4, 40B = DDR4 with different features) | | Density | 512M | 512 Megabits (total per chip). Multiply by organization to get device density. | | Organization | 16 | x16 (data width in bits) | | Package | JY | J = 78-ball BGA, Y = Pb-free, Halogen-free | | Speed Grade | -083E | 083 = 8-8-8 (DDR4-2400), E = DRAM revision | | Revision | :B | B-die revision |

| Code | Organization | |------|--------------| | 4 | x4 | | 8 | x8 | | 16 | x16 | | 32 | x32 | micron memory part number decoder

Micron part numbers generally consist of roughly 13 to 18 characters broken down into distinct fields. While configurations can vary slightly by product family (e.g., NAND Flash vs. DRAM), the standard format for DRAM Modules follows this sequence:

[Family] [Density][Depth] [Organization] [Package] [Speed] [Feature/Revision]

Let’s break down the most common example: a standard DDR4 UDIMM. This section tells you the total capacity and

This two-digit or three-digit code describes the form factor and function: | Code | Meaning | |------|---------| | 8 | 72-pin SIMM (obsolete) | | 16 | 168-pin DIMM (SDRAM) | | 18 | Standard DIMM (DDR1 through DDR5) | | 20 | SODIMM (Small Outline DIMM) for laptops | | 26 | Mini-RDIMM | | 32 | MicroDIMM | | 36 | CUDIMM (for DDR5 with clock driver) |

In MTA18ASF..., the 18 means it is a standard 288-pin DIMM (desktop/server form factor).

Here is how we dissect this string character by character. F: Voltage/Timing identifier (often varies by generation)

Apply the appropriate product-line-specific table or Micron datasheet mapping for exact meanings.

It is important to distinguish between the module capacity and the DRAM chip capacity.