[SGM][SERIES][VARIANT][-VOLTAGE][PACKAGE][G][/TR]
  |     |        |        |         |     |   |
  |     |        |        |         |     |   +-- /TR = Tape and Reel
  |     |        |        |         |     +-- G = Green/RoHS
  |     |        |        |         +-- Package code (YN5, XN, YS8, etc.)
  |     |        |        +-- Optional voltage (e.g., -3.3)
  |     |        +-- Variant letter (A, B, etc.)
  |     +-- 4-5 digit series (2xxx, 4xxx, 58xxx, 6xxx, 8xxx)
  +-- SGM = SG Micro prefix

SGM2019-3.3YN5G/TR
|  |   |   |  | |
|  |   |   |  | +-- /TR = Tape and reel
|  |   |   |  +-- G = RoHS/Green
|  |   |   +-- YN5 = SOT-23-5 package
|  |   +-- 3.3 = 3.3V output voltage
|  +-- 2019 = LDO regulator series
+-- SGM = SG Micro prefix

SGM8051XN5G/TR
|  |  | | | |
|  |  | | | +-- /TR = Tape and reel
|  |  | | +-- G = RoHS
|  |  | +-- XN5 = SC70-5 package
|  |  +-- 1 = Variant (single op-amp)
|  +-- 805 = Op-amp series
+-- SGM = SG Micro prefix

SGM6603AYTD6G/TR
|  |  | |   | |
|  |  | |   | +-- /TR = Tape and reel
|  |  | |   +-- G = RoHS
|  |  | +-- YTD6 = DFN-6 package
|  |  +-- A = Variant
|  +-- 6603 = DC-DC converter series
+-- SGM = SG Micro prefix

// SG Micro package codes start with Y, X, or U
// Pattern: SGM[0-9]{4,5}[-.]?[voltage]?[package-code]G?(/TR)?
// Extract 2-4 uppercase letters optionally followed by digits

// Remove G and /TR suffixes first
String baseMpn = upperMpn.replaceAll("G?(/TR)?$", "");

// Find package code pattern
Pattern packagePattern = Pattern.compile(".*?([XYUQ][A-Z]*[0-9]*)(?:G?(/TR)?)?$");

// SGM58xxx is special (5 digits)
// Other series are 4 digits: SGM2xxx, SGM4xxx, SGM6xxx, SGM8xxx

if (upperMpn.startsWith("SGM58") && upperMpn.length() >= 8) {
    return "SGM58";  // High-precision ADC series
}
if (upperMpn.matches("^SGM[0-9][0-9]{3}.*")) {
    return upperMpn.substring(0, 4);  // SGM2, SGM4, SGM6, SGM8
}

// Op-amps: SGM80xx through SGM85xx
private boolean isOpAmp(String mpn) {
    return mpn.matches("^SGM8[0-5][0-9]{2}[A-Z0-9./-]*$");
}

// Comparators: SGM87xx and higher
private boolean isComparator(String mpn) {
    return mpn.matches("^SGM8[7-9][0-9]{2}[A-Z0-9./-]*$");
}

// Voltage can appear as -3.3 or -3.0 in the MPN
// SGM2019-3.3YN5G/TR -> 3.3V output
// The handler allows dots in MPN patterns: [A-Z0-9./-]*

public boolean isLDOPart(String mpn) {
    return mpn.matches("^SGM2[0-9]{3}[A-Z0-9./-]*$");
}

public boolean isDCDCPart(String mpn) {
    return mpn.matches("^SGM6[0-9]{3}[A-Z0-9./-]*$");
}

public boolean isOpAmpPart(String mpn) {
    return mpn.matches("^SGM8[0-5][0-9]{2}[A-Z0-9./-]*$");
}

public boolean isComparatorPart(String mpn) {
    return mpn.matches("^SGM8[7-9][0-9]{2}[A-Z0-9./-]*$");
}