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epson

爱普生计时设备的MPN编码模式、后缀解码以及处理器指南。在使用爱普生晶体、振荡器、实时时钟或EpsonHandler时参考。

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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

| 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 |

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:

| 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) |

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

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 |

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) |

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 |

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

| 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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