Cantara/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.

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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

| Prefix | Product Type | Description | |--------|--------------|-------------| | FA | AT-Cut Crystal | Fundamental and overtone crystals | | FC | Tuning Fork Crystal | 32.768 kHz crystals for RTC | | MA | High Frequency Crystal | MHz range crystals | | MC | Ceramic Package Crystal | Crystals in ceramic packages | | SG | Standard Oscillator | SPXO (Simple Packaged Crystal Oscillator) | | TG | TCXO | Temperature Compensated Crystal Oscillator | | VG | VCXO | Voltage Controlled Crystal Oscillator | | HG | OCXO | Oven Controlled Crystal Oscillator | | RX | RTC Module | Real-Time Clock with integrated crystal | | RA | Programmable Timer | Timer ICs | | RR | RTC IC | Real-Time Clock ICs |

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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

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Supported Component Types

The EpsonHandler supports these ComponentTypes:

| ComponentType | Description | Example Prefixes | |---------------|-------------|------------------| | CRYSTAL | Generic crystal type | FA, FC, MA, MC | | CRYSTAL_EPSON | Epson-specific crystal | FA, FC, MA, MC | | OSCILLATOR | Generic oscillator type | SG, TG, VG, HG | | OSCILLATOR_EPSON | Epson-specific oscillator | SG | | OSCILLATOR_TCXO_EPSON | Temperature compensated | TG | | OSCILLATOR_VCXO_EPSON | Voltage controlled | VG | | OSCILLATOR_OCXO_EPSON | Oven controlled | HG | | RTC_EPSON | RTC modules | RX | | TIMER_EPSON | Programmable timers | RA | | GYRO_SENSOR_EPSON | Gyroscope sensors | (not in patterns) |

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Package Code Extraction

Crystal Packages (FA, FC)

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

| Size Code | Package Dimensions | |-----------|-------------------| | 128 | 1.2 x 1.0mm | | 135 | 1.6 x 1.2mm | | 238 | 2.0 x 1.6mm | | 328 | 3.2 x 2.5mm | | 405 | 4.0 x 2.5mm | | 506 | 5.0 x 3.2mm |

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:

| Model Code | Package Dimensions | |------------|-------------------| | 210 | 2.0 x 1.6mm | | 310 | 2.5 x 2.0mm | | 510 | 3.2 x 2.5mm | | 531 | 5.0 x 3.2mm | | 7050 | 7.0 x 5.0mm | | 8002 | 8.0 x 4.5mm |

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

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Series Extraction

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

Crystal Series

| Prefix | Contains | Series Name | |--------|----------|-------------| | FA | - | AT-Cut Crystal | | FC | - | Tuning Fork Crystal | | MA | - | High Frequency Crystal | | MC | - | Ceramic Package Crystal |

Oscillator Series

| Prefix | Contains | Series Name | |--------|----------|-------------| | SG | 210 | Programmable Oscillator | | SG | (other) | Standard Oscillator | | TG | 3541 | High Stability TCXO | | TG | (other) | TCXO | | VG | 4513 | High Stability VCXO | | VG | (other) | VCXO | | HG | - | OCXO |

RTC Series

| Prefix | Contains | Series Name | |--------|----------|-------------| | RX | 4571 | Low Power RTC | | RX | 8900 | High Accuracy RTC | | RX | (other) | RTC Module |

Timing IC Series

| Prefix | Series Name | |--------|-------------| | RA | Programmable Timer | | RR | RTC IC |

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Frequency Code Patterns

Epson MPNs often include frequency specifications:

| Format | Meaning | Example | |--------|---------|---------| | XX.XXXXMHZ | Megahertz | 24.0000MHZ | | XX.XXXXM | Megahertz (short) | 24.0000M | | 32.768K | Kilohertz | 32.768K (standard RTC frequency) |

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Common Example MPNs

Crystals

| MPN | Type | Size | Frequency | |-----|------|------|-----------| | FA-128 8.0000MF20X-K3 | AT-Cut | 1.2 x 1.0mm | 8 MHz | | FA-238 16.0000MB-W3 | AT-Cut | 2.0 x 1.6mm | 16 MHz | | FC-135 32.7680KA-A3 | Tuning Fork | 1.6 x 1.2mm | 32.768 kHz | | MC-306 32.7680KA-A0 | Ceramic | 3.2 x 1.5mm | 32.768 kHz |

Oscillators

| MPN | Type | Size | Frequency | |-----|------|------|-----------| | SG-210STF 24.0000ML0 | Standard | 2.0 x 1.6mm | 24 MHz | | SG-310STF 48.0000MB0 | Standard | 2.5 x 2.0mm | 48 MHz | | TG-3541CE 10.0000MC-C | TCXO | 5.0 x 3.2mm | 10 MHz | | VG-4513CA 25.0000M | VCXO | 5.0 x 3.2mm | 25 MHz |

RTC Modules

| MPN | Type | Features | |-----|------|----------| | RX-4571LC | Low Power RTC | Ultra-low power | | RX-8900CE UA | High Accuracy | Temperature compensation | | RX-8010SJ | Standard RTC | I2C interface |

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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 "";
}

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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

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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

| Type | Stability | Use Case | |------|-----------|----------| | SPXO (SG) | Standard | General timing | | TCXO (TG) | High | Mobile, GPS | | VCXO (VG) | Medium, tunable | PLL, clock recovery | | OCXO (HG) | Ultra-high | Telecom, instrumentation |

RTC Module Selection

| Series | Power | Accuracy | Interface | |--------|-------|----------|-----------| | RX-4571 | Ultra-low | Standard | I2C | | RX-8900 | Low | High | I2C/SPI | | RX-8010 | Standard | Standard | I2C |

Competing Products

| Epson | NDK | TXC | Kyocera | |-------|-----|-----|---------| | FA-xxx | NX series | 7A series | KC series | | SG-xxx | NT series | 8Z series | KT series | | TG-xxx | NT series | 8P series | KT series |

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