Txc

Series Codes

Crystal Series

Oscillator Series

Frequency Encoding

Frequency is encoded after the series prefix with a hyphen separator:

Temperature Grades

Temperature grade is typically the second character in the options suffix after the frequency.

Package Codes

TXC uses the series prefix to indicate general package type, with additional suffix encoding:

By Series

Suffix Codes

Replacement Compatibility

TXC parts are compatible when:

1. Same series (7M vs 7M, 8Y vs 8Y)
2. Same frequency (12.000M matches 12.000M)
3. Compatible temperature (Extended can replace Commercial, not vice versa)

Temperature Grade Upgrade Path

Commercial (A) can be upgraded to Extended (E)
Extended (E) CANNOT be downgraded to Commercial (A)

Common Part Numbers

Standard Crystals (7M)

SMD Crystals (8Y)

Clock Oscillators (9C)

VCXO (7V)

TCXO (7X)

Handler Implementation Notes

Series Code Extraction

// Series is first 2 characters
String extractSeriesCode(String mpn) {
    if (mpn == null || mpn.length() < 2) return "";
    String prefix = mpn.substring(0, 2).toUpperCase();
    return switch (prefix) {
        case "7M", "8Y", "9C", "7V", "7X", "AX" -> prefix;
        default -> "";
    };
}

Frequency Extraction

// Frequency is after first hyphen, ends with M or K
String extractFrequency(String mpn) {
    int dashIndex = mpn.indexOf('-');
    if (dashIndex < 0) return "";
    String afterDash = mpn.substring(dashIndex + 1);

    // Find end of frequency (M for MHz, K for kHz)
    for (int i = 0; i < afterDash.length(); i++) {
        char c = afterDash.charAt(i);
        if (c == 'M' || c == 'K') {
            return afterDash.substring(0, i + 1);
        }
    }
    return "";
}

Temperature Grade Detection

// Look for E (Extended) or A (Commercial) in options suffix
String extractTemperatureGrade(String mpn) {
    // Remove trailing -T if present
    String workMpn = mpn.endsWith("-T") ? mpn.substring(0, mpn.length() - 2) : mpn;

    // Find options suffix after frequency
    // E anywhere = Extended, A anywhere = Commercial
    String optionsSuffix = /* extract suffix after frequency */;
    if (optionsSuffix.contains("E")) return "Extended";
    if (optionsSuffix.contains("A")) return "Commercial";
    return "";
}

Related Files

• Handler: manufacturers/TXCHandler.java
• Component types: CRYSTAL, OSCILLATOR
• No manufacturer-specific types defined

Learnings & Edge Cases

• Frequency format: Always includes decimal for precision (12.000M, not 12M)
• Temperature in suffix: The second character in options suffix typically indicates temperature grade
• Series determines package: Unlike other manufacturers, TXC uses series prefix to indicate package type
• VCXO/TCXO distinction: 7V = voltage controlled, 7X = temperature compensated (different applications)
• Automotive (AX): Requires AEC-Q200 qualification, typically extended temp range