Number Decoder | Micron Memory Part

In MTA18ASF... , the 18 means it is a (desktop/server form factor).

This is the complete, official manufacturing string (e.g., MT40A1G8SA-062E:E ) found on module labels or data sheets.

: Corresponding to high-speed DDR5 / LPDDR5 operations (e.g., 4266 Mbps to 4800 Mbps classes). 6 & 7. Temperature and Special Options

Second generation (often smaller, more power-efficient, or optimized). :E: Advanced revision addressing yield optimizations. Micron FBGA Code vs. Full Part Number

Learning to decode Micron’s part numbers saves you from costly compatibility errors and helps you source exact replacements in seconds. While the system looks intimidating at first glance, it follows strict JEDEC and internal logic. Memorize the core segments: micron memory part number decoder

Indicates a clock cycle time of 0.625 nanoseconds, which corresponds to DDR4-3200 speeds with specific latencies.

| Segment (within MT48LC16M8A2TG-75 ) | Field Description | | :--- | :--- | | | Manufacturer: This prefix is common to almost all Micron memory products and simply stands for "Micron Technology". | | 48 | Product Family: This two-digit number indicates the type of memory. For example, 48 stands for SDRAM, 46 for DDR SDRAM, and 6 for RDRAM (Rambus DRAM). | | LC | Process Technology: These letters often indicate the operating voltage of the chip's core. For example, C represents a 5V CMOS process, while LC represents a 3.3V CMOS process. | | 16M | Depth: The capacity of the device is calculated by a formula: Depth x Width . In this example, 16M means the memory array is 16 Meg deep. | | 8 | Width: This number specifies the device's data width in bits. An 8 means the chip is organized as an 8-bit wide device. The full capacity is, therefore, 16M x 8 = 128 Megabits (Mb). | | A2 | Die Revision & Options: The A here typically indicates the die revision, and the following number ( 2 ) may indicate options like power-saving features. | | TG | Package Type: These two letters identify the physical package. TG stands for TSOPII (Thin Small Outline Package), but many other codes exist for BGA and other package types. | | -75 | Speed Grade: This number is the device's rated speed, often in nanoseconds (ns). -75 indicates an access time of 7.5ns (133 MHz operation). |

: 4 Gigabit depth x 4-bit width (16 Gb total chip density)

4 Gigabits total capacity, organized as x16 (16 bits wide). 5. Package and Hardware Revisions In MTA18ASF

“-062E” is where timing enthusiasts focus. The “062” indicates the minimum cycle time in nanoseconds (ns)—here, 0.62 ns, which corresponds to a data rate of 1600 MHz (DDR4-3200). For older parts, “-125” meant 1.25 ns = DDR-800. The trailing “E” specifies the CL (CAS latency) and timing table, e.g., CL22 for DDR4-3200. Speed grade mismatches can cause system instability or failure to boot.

When inspecting an actual physical Micron RAM chip inside a computer or server, you will rarely see the full, long part number printed on the plastic casing. Due to space constraints on micro-components, Micron prints a short 5-character alphanumeric string known as an (or "Laser Mark").

The final character after the colon indicates the design iteration or "stepping" of the silicon architecture. First generation of that specific die.

Indicates a specific FBGA (Fine-Pitch Ball Grid Array) package layout. : Corresponding to high-speed DDR5 / LPDDR5 operations (e

This field tells you total capacity and bit organization.

MT Type Family Density Device Block Voltage Package Temp

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) |

Whether you are an IT manager, an electronics hobbyist, or a motherboard designer, this decoder guide gives you the power to look at any Micron memory component and know exactly what it is.

: Memory chips are very small. The long standard part number cannot fit on the tiny plastic case. Micron prints a short five-digit code on the chip instead. This short text is called an FBGA code.