The speed grade determines the maximum clock frequency and data rate the memory can safely handle. : DDR4-3200 (PC4-25600) with CL22 timing -053E : DDR4-3733 -48B : DDR5-4800 -56B : DDR5-5600 6. Die Revision

Prefix indicating Micron manufacturer. 40 (Product Family): 40: DDR4 SDRAM 41: DDR3 SDRAM 53: LPDDR4/LPDDR5 62: Mobile LPDDR2 A (Voltage): A: 1.2V (DDR4) B/C/D/K: Other voltages (e.g., 1.35V DDR3L) 1G8 (Configuration): 1G: Density ( 8: Bus width ( ×8cross 8 S (Revision): Die revision (e.g., A, B, C). A (Package): Defines physical FBGA package. -062E (Speed/Latency): -062E: DDR4-3200 (0.625ns) -075: DDR4-2666 (0.75ns) IT (Operating Temperature): Blank: Commercial ( IT: Industrial ( AT: Automotive ( or higher) :E (Die Revision): Final component revision designator.

Package codes dictate the physical footprint, ball count, and material composition of the chip. : 78-ball FBGA (typically used for x4/x8 DDR4) RC : 96-ball FBGA (typically used for x16 DDR4) HC : 78-ball FBGA (DDR5) HE : 102-ball FBGA (DDR5) 5. Speed Grade and Cycle Time

Micron’s part numbering system for DRAM is well-structured. Most DDR4 and DDR5 component part numbers begin with the prefix "MT," which stands for Micron Technology. This is followed by a two-digit number that denotes the product family and memory type (e.g., 48 for SDRAM, 46 for DDR SDRAM, 40 for DDR4, and 60 for DDR5).

The alphanumeric string after the hyphen represents the speed capability, often expressed as cycle time or data rate: : DDR4-3200 (PC4-25600) with CL22 latency. -075 : DDR4-2666 (PC4-21333).

Separated by a hyphen, this code dictates the maximum data rate or clock frequency the chip can safely handle. DDR4-3200 (PC4-25600) with CL22 latency. -075: DDR4-2666 (PC4-21333) with CL19 latency. -48BA: DDR5-4800 with standard JEDEC timings. -56BC: DDR5-5600 with optimized latencies. 6. Die Revision

: Identifies the maximum clock speed or data transfer rate.

: Use the FBGA Parts Decoder to convert the 5-digit code on a chip (e.g., D9WFL) into a full part number.

If you have a partial or heavily scrubbed part number, look for Micron's (a 5-digit alphanumeric code usually printed in the center of smaller chips). Micron provides an online FBGA-to-Part-Number reverse lookup tool on their official website to help convert these short codes back into full part numbers.

This section defines the basic technology type of the memory device. DDR4 SDRAM 60: DDR5 SDRAM 41: Low-Power DDR4 (LPDDR4) 62: Low-Power DDR5 (LPDDR5) 29F: NAND Flash Memory 3. Operating Voltage and Configuration

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

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

Micron Technology is a global leader in semiconductor systems, producing vast quantities of DRAM, NAND flash, and solid-state storage. If you have ever looked at a Micron memory module or chip, you have likely seen a complex string of alphanumeric characters printed on the surface.