[PREFIX][DENSITY][PACKAGE][-SUFFIX]
   |       |        |        |
   |       |        |        +-- Optional: Grade/Temperature (SSH, SUH)
   |       |        +-- Package code (H, U, SH, SU)
   |       +-- Memory density (80=8Mbit, 16, 32, 64, 128)
   +-- Series prefix (P25Q, P25D, PY25Q)

P25Q80H
|  | ||
|  | |+-- H = SOIC-8 package
|  | +-- 80 = 8 Mbit density
|  +-- Q = Standard series
+-- P25 = Puya SPI Flash prefix

P25Q16H-SSH
|  |  | | |
|  |  | | +-- SSH = SOIC-8 (hyphenated suffix)
|  |  | +-- H = base package indicator
|  |  +-- 16 = 16 Mbit density
|  +-- Q = Standard series
+-- P25 = Puya SPI Flash prefix

PY25Q128HA
| | |  ||
| | |  |+-- A = Grade code (Automotive)
| | |  +-- H = SOIC-8 package
| | +-- 128 = 128 Mbit density
| +-- Y25Q = Automotive grade series
+-- P = Puya prefix

// P25Q series - Standard SPI NOR Flash
"^P25Q\\d+.*"

// P25D series - Low Power SPI NOR Flash
"^P25D\\d+.*"

// PY25Q series - Automotive Grade (check first as more specific)
"^PY25Q\\d+.*"

// Handle hyphenated suffixes first
int hyphenIndex = upperMpn.indexOf('-');
if (hyphenIndex > 0) {
    String suffix = upperMpn.substring(hyphenIndex + 1);
    // Check against PACKAGE_CODES map
}

// Then extract trailing package code after density
// P25Q80H -> H (SOIC-8)
// Check longer suffixes before shorter ones (SU before U, SH before H)

// Special case: 80 = 8Mbit, not 80Mbit
switch (densityCode) {
    case "80" -> "8";
    default -> densityCode;
}

// Check prefix to determine grade
if (upperMpn.startsWith("PY25Q")) return "Automotive";
if (upperMpn.startsWith("P25D")) return "Low Power";
if (upperMpn.startsWith("P25Q")) return "Standard";