Epson

Epson MPNs follow this general structure:

[FAMILY][SIZE/MODEL]-[SPEC][FREQUENCY][OPTIONS]
   |        |           |       |         |
   |        |           |       |         +-- Temperature grade, packaging
   |        |           |       +-- Frequency code (MHz or kHz)
   |        |           +-- Specification variant
   |        +-- Size code or model number
   +-- Product family prefix (FA, FC, SG, TG, etc.)

Family Prefixes

Example MPN Decoding

Crystal Example

FA-128 32.0000MF10X-K3
|   |   |        |  |
|   |   |        |  +-- K3 = Packaging/tape specification
|   |   |        +-- F10X = Frequency tolerance spec
|   |   +-- 32.0000M = 32 MHz frequency
|   +-- 128 = Size code (1.2 x 1.0mm)
+-- FA = AT-Cut Crystal family

Oscillator Example

SG-210STF 24.0000ML0
|    |    |        |
|    |    |        +-- L0 = Operating voltage/stability spec
|    |    +-- 24.0000M = 24 MHz frequency
|    +-- 210 = Size code (2.0 x 1.6mm) + STF variant
+-- SG = Standard Oscillator

RTC Module Example

RX-8900CE UA
|    |    |  |
|    |    |  +-- UA = Package variant
|    |    +-- CE = Specific model variant
|    +-- 8900 = High Accuracy RTC series
+-- RX = RTC Module family

Supported Component Types

The EpsonHandler supports these ComponentTypes:

Package Code Extraction

Crystal Packages (FA, FC)

The handler extracts package size from the model number after the hyphen:

Extraction Logic:

// Extract 3 characters after the first hyphen
String sizeCode = mpn.substring(mpn.indexOf('-') + 1, mpn.indexOf('-') + 4);
// Map to actual dimensions

Oscillator Packages (SG, TG, VG, HG)

The handler extracts package size from the model number:

Extraction Logic:

// Extract up to 4 characters after the first hyphen
String modelNum = mpn.substring(mpn.indexOf('-') + 1, mpn.indexOf('-') + 5);
// Map to actual dimensions

Series Extraction

The handler extracts series names based on prefix and model variants:

Crystal Series

Oscillator Series

RTC Series

Timing IC Series

Frequency Code Patterns

Epson MPNs often include frequency specifications:

Common Example MPNs

Crystals

Oscillators

RTC Modules

Handler Implementation Notes

Pattern Registration

The handler registers patterns for both base and manufacturer-specific types:

// Crystal patterns - register for BOTH types
registry.addPattern(ComponentType.CRYSTAL, "^FA-?[0-9].*");
registry.addPattern(ComponentType.CRYSTAL_EPSON, "^FA-?[0-9].*");

Replacement Compatibility

The isOfficialReplacement() method considers:

1. Same series - Different series are never replacements
2. Same package - Package must match for physical compatibility
3. High stability upgrade - High stability versions can replace standard
4. Same frequency - Frequency code must match

// High stability can replace standard
if (series1.contains("High Stability") &&
    series2.replace("High Stability ", "").equals(series1.replace("High Stability ", ""))) {
    return true;
}

Frequency Extraction

The handler extracts frequency from the suffix after the last hyphen:

private String extractFrequencyCode(String mpn) {
    int freqStart = mpn.lastIndexOf('-');
    if (freqStart >= 0 && freqStart < mpn.length() - 1) {
        return mpn.substring(freqStart + 1);
    }
    return "";
}

Related Files

• Handler: manufacturers/EpsonHandler.java
• Component types: CRYSTAL, CRYSTAL_EPSON, OSCILLATOR, OSCILLATOR_EPSON, OSCILLATOR_TCXO_EPSON, OSCILLATOR_VCXO_EPSON, OSCILLATOR_OCXO_EPSON, RTC_EPSON, TIMER_EPSON, GYRO_SENSOR_EPSON

Learnings & Quirks

Handler Issues (Identified)

• HashSet in getSupportedTypes(): Should use Set.of() for immutability
• Missing IC type: RTC and timer patterns are registered under ComponentType.IC but IC is not in getSupportedTypes()
• Package extraction edge case: If MPN has no hyphen, indexOf('-') returns -1, causing StringIndexOutOfBoundsException (handler catches this)
• Model number length varies: Package extraction assumes 3-4 character model numbers, but some products may differ

MPN Format Variations

• With hyphen: FA-128, SG-210STF (standard format)
• Without hyphen: FA128, SG210 (some datasheets omit hyphen)
• Pattern handles both: ^FA-?[0-9].* uses -? for optional hyphen

Oscillator Type Hierarchy

RTC Module Selection

Competing Products