Micron part numbers are hierarchical: a prefix identifies the product family, followed by blocks encoding density/organization, speed/voltage, package, temperature, and internal revision/lot codes. Notation varies across product lines (DRAM: DDR4/DDR5, LPDDR; NAND: SLC/MLC/TLC/QLC), but common motifs appear:
If you work in IT procurement, system building, or hardware repair, you have likely stared at a string of alphanumeric characters on a RAM stick and wondered what it all means. Micron Technology—parent company of the consumer-facing brand Crucial—is one of the world’s largest manufacturers of DRAM, NAND, and SSD storage. Their part numbering system is complex but incredibly logical.
Decoding a Micron memory part number is not just an academic exercise. It tells you the density, speed, voltage, package type, temperature rating, and environmental compliance of a component. Misreading it could result in buying an incompatible SODIMM for a laptop or using an industrial-grade chip in a consumer device (or vice versa).
This article serves as a complete Micron memory part number decoder—breaking down every segment of the code for DRAM modules, discrete DRAM components, and solid-state drives.
Decoding a Micron part number allows you to instantly verify if a stick of RAM is compatible with a motherboard or server. The next time you see a label like MT18ASF1G72AZ-2E3, you can break it down:
By mastering these codes, you eliminate the guesswork from hardware maintenance and upgrades. micron memory part number decoder
| Field | Code | Meaning | |-------|------|---------| | MTA | Micron Module | | 18 | Module generation/density factor | | ADF | Module type (ADF = DDR4 RDIMM, ASF = SODIMM, etc.) | | 2G | Total module density (2GB per rank or total) | | 72 | Data width (72 bits = 64 + 8 ECC) | | AZ | PCB/configuration code | | -3G2E1 | Speed: 3G2 = DDR4-3200, E1 = specific timing/temperature |
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 provides official documentation: the “Micron Memory Part Number Decoder” is actually a cross-reference guide in their datasheets and a web-based search tool on their website. But understanding the logic empowers engineers to decode at a glance without internet access.
Micron’s part numbering system is logical, but it’s dense. Once you memorize the prefix (MT40A = DDR4, MT53E = LPDDR4) and the speed codes (-062E = 3200), you’ll read these like a native.
Pro move: Bookmark Micron’s official Part Marking Decoder (free, no login required). Enter your string, and it spits out density, speed, voltage, and a direct datasheet link. Micron part numbers are hierarchical: a prefix identifies
Have a mystery part number? Drop it in the comments—let’s decode it together.
Further Reading:
Micron FBGA and Part Marking Decoder is an essential technical utility for hardware engineers, repair technicians, and enthusiasts who need to identify specific memory chips. Because FBGA-packaged components are too small to fit a full marketing part number, Micron uses a shorthand 5-digit code (the "FBGA code") laser-marked on the chip. Key Features Abbreviation Translation
: It acts as a bridge between the physical marking on a chip (e.g., a five-digit alphanumeric string like "D9WFK") and the official Marketing Part Number (MPN) Data Sheet Access
: Once the full part number is retrieved, the tool often provides direct links to the relevant data sheets for technical specifications like voltage, density, and speed. Comprehensive Database Decoding a Micron part number allows you to
: The decoder covers a wide range of Micron products, including DRAM (DDR4, DDR5), NAND Flash, and SSD components. Ease of Use
: The interface is straightforward—you simply enter the 5-digit code found on the chip (usually preceded by an "MT" mark) to get immediate results. : Using the official Micron FBGA Part Decoder
ensures you aren't relying on third-party spreadsheets or outdated forum posts. Cross-Compatibility
: It supports both active and obsolete part catalogs, making it useful for servicing legacy hardware. Limitations Package Dependency
: The decoder is specifically for FBGA-packaged components. Standard modules (like DIMMs) typically use a Serial Presence-Detect (SPD) Lookup Mobile Experience
: While functional, the official tool is optimized for desktop technical use; identifying tiny laser marks on physical chips remains a manual, often difficult prerequisite. The Micron Part Number Decoder is a mission-critical tool
for anyone working at the component level. While casual consumers might find it overly technical, it is the only definitive way to verify the exact specifications of a Micron chip without secondary software. part numbering guide for a specific memory type (like DDR5 or NAND)? FBGA and part decoder | Micron Technology Inc.