Micron Memory Part Number Decoder May 2026

This is the per-chip density, not the module size.

Pro tip: To get the total chip capacity in Gigabytes, divide by 8. (512Mbit / 8 = 64MByte per chip).

Micron utilizes a specialized part numbering system that differs between full Marketing Part Numbers (MPN) and abbreviated FBGA Marking Codes

found physically on memory chips. To bridge this gap, Micron provides the FBGA and Component Marking Decoder

tool to convert short codes into complete, searchable part numbers. 1. FBGA Marking Code vs. Full Part Number micron memory part number decoder

Because of physical space constraints on small memory packages, Micron cannot print the entire MPN on the chip. Instead, they use a five-digit alphanumeric code

This code is typically the second five-digit mark on the chip, often found on the middle or bottom row of text. Common Prefixes: : Standard production parts (e.g., D9WFL).

: Often indicates parts used specifically for Crucial brand modules. : Reserved for engineering samples. 2. How to Use the Decoder Tool To identify a specific chip, use the official Micron FBGA Part Marking Decoder Locate the Code: Find the 5-digit string on the physical chip. Enter the code into the "FBGA Code" field on the website. The tool returns the full Marketing Part Number (e.g., MT40A1G8SA-075:E ), which can then be used to find the Product Data Sheet 3. Anatomy of a Micron Part Number A full Micron MPN (like MT40A1G8SA-075:E ) breaks down into specific segments: : Micron Technology. : Product Family (e.g., 40 = DDR4 SDRAM, 41 = DDR3).

: Density and Configuration (e.g., 1Gb capacity with x8 width). : Package Code (FBGA/BGA type). : Speed Grade (Clock rate/MT/s target). This is the per-chip density, not the module size

: Operating Temperature (e.g., IT = Industrial, blank = Commercial).

: Die Revision (Designator for specific internal silicon version). 4. Additional Decoder Resources

Micron offers supplemental guides for specific product categories: FBGA and part decoder | Micron Technology Inc.

Decoding Micron Technology memory part numbers can be complex because the format varies significantly between product families (e.g., DRAM vs. NAND Flash vs. Managed NAND). However, the most common decoding requests involve DRAM (DDR4, DDR5) and NAND Flash components. Pro tip: To get the total chip capacity

Below is a detailed decoder guide broken down by product family.

When looking at a label, use these tables to quickly identify the core specs.

This is the most critical number for performance compatibility. Micron uses a specific digit to represent the transfer rate in MT/s (MegaTransfers per second).