Epson

Epson Timing Devices Manufacturer Skill

Manufacturer Overview

Epson (Seiko Epson Corporation) is a leading manufacturer of timing devices including:

• Crystal Units: AT-cut crystals, tuning fork crystals, ceramic package crystals
• Oscillators: Standard clock oscillators (SPXO), programmable oscillators
• TCXOs: Temperature Compensated Crystal Oscillators (high stability)
• VCXOs: Voltage Controlled Crystal Oscillators
• OCXOs: Oven Controlled Crystal Oscillators (ultra-high stability)
• RTC Modules: Real-Time Clock modules with integrated crystals
• Timing ICs: Programmable timers, RTC ICs

Epson's timing devices are known for high precision and reliability, widely used in communications, automotive, industrial, and consumer electronics.

MPN Structure

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