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name: esmt description: ESMT (Elite Semiconductor Memory Technology) MPN encoding patterns, suffix decoding, and handler guidance. Use when working with ESMT DRAM and Flash memory components or ESMTHandler.

ESMT (Elite Semiconductor Memory Technology) Manufacturer Skill

MPN Structure

ESMT MPNs follow this general structure:

Copy[PREFIX][DENSITY][CONFIG][VERSION]-[SPEED][PACKAGE]
   |       |        |       |        |        |
   |       |        |       |        |        +-- Package code (TG, BG, etc.)
   |       |        |       |        +-- Speed grade (6, 5, 2.5, 100, 70)
   |       |        |       +-- Version letter (A, B, etc.)
   |       |        +-- Memory configuration (bus width, banks)
   |       +-- Density in Mbit
   +-- Series prefix (M12L, M14D, F25L, F49L)

Example Decoding

CopyM12L128168A-6TG
|  |   |  ||  ||
|  |   |  ||  |+-- TG = TSOP-II package
|  |   |  ||  +-- 6 = 6ns speed grade
|  |   |  |+-- A = version/revision
|  |   |  +-- 8 = 8 banks
|  |   +-- 16 = 16-bit data bus
|  +-- 128 = 128 Mbit density
+-- M12L = SDRAM series

F25L016A-100PAIG
|  |  ||    | ||
|  |  ||    | |+-- IG = Industrial grade
|  |  ||    | +-- PA = SOP package
|  |  ||    +-- 100 = 100MHz speed
|  |  |+-- A = version
|  |  +-- 016 = 16 Mbit
|  +-- 25L = SPI Flash series
+-- F = Flash prefix

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Series Prefixes

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Density Codes

SDRAM (M12L) and DDR (M14D)

SPI Flash (F25L)

Parallel Flash (F49L)

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Package Codes

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Speed Grades

SDRAM/DDR

Flash

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Product Families

M12L Series - SDRAM

M14D Series - DDR SDRAM

F25L Series - SPI Flash

F49L Series - Parallel Flash

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Configuration Encoding (SDRAM/DDR)

The configuration digits after the density encode:

CopyM12L128168A
       |||
       ||+-- Banks (4 or 8)
       |+-- Data bus width (16-bit = 16)
       +-- First digit varies

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Handler Implementation Notes

Pattern Matching

Copy// SDRAM - M12L series
"^M12L\\d+.*"

// DDR SDRAM - M14D series
"^M14D\\d+.*"

// SPI Flash - F25L series (also MEMORY_FLASH type)
"^F25L\\d+.*"

// Parallel Flash - F49L series (also MEMORY_FLASH type)
"^F49L\\d+.*"

Package Code Extraction

Copy// Handle hyphenated MPNs - get part after last hyphen
int lastHyphen = upperMpn.lastIndexOf('-');
if (lastHyphen > 0) {
    String suffix = upperMpn.substring(lastHyphen + 1);
    // Strip leading speed grade digits/dots
    String pkgCode = suffix.replaceAll("^[0-9.]+", "");
    // Check PACKAGE_CODES map
}

Density Extraction Complexities

Copy// SPI Flash uses leading zeros: 004, 008, 016
// Parallel Flash uses scaled encoding: 160=16Mbit

// F25L004A -> "4" (strip leading zeros)
// F49L160UA -> "16" (scale down by 10)

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Cross-References

SDRAM Equivalents

SPI Flash Equivalents

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Related Files

• Handler: manufacturers/ESMTHandler.java
• Component types: MEMORY, MEMORY_FLASH, IC

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Learnings & Edge Cases

• Leading zeros in F25L: SPI Flash density codes have leading zeros (004, 008, 016)
• Scaled encoding in F49L: Parallel Flash uses 160=16Mbit, 320=32Mbit encoding
• Configuration encoding: SDRAM part numbers encode bus width and bank count
• Speed grade in suffix: Speed appears before package code after hyphen (e.g., -6TG = 6ns + TSOP-II)
• Industrial grade suffix: PAIG = SOP package with Industrial Grade indicator
• Version letters: A, B, C indicate silicon revisions, not always form/fit/function compatible