name: holtek description: Holtek Semiconductor MPN encoding patterns, suffix decoding, and handler guidance. Use when working with Holtek MCUs, touch controllers, LCD drivers, or HoltekHandler.

Holtek Semiconductor Manufacturer Skill

MPN Structure

Holtek has two main naming conventions:

HT Series (MCUs, Audio, USB, LCD)

HT[FAMILY][TYPE][PRODUCT]-[PACKAGE]
│    │      │      │          │
│    │      │      │          └── Package suffix (-1=SOP, -2=SOP, -3=SSOP)
│    │      │      └── Product number within series
│    │      └── Type (F=Flash MCU, V=Voice, B=Bridge)
│    └── Family (66/67/68=Flash MCU, 45=Touch, 82=Voice, 42=USB, 16=LCD)
└── Holtek prefix

Example: HT66F0185 = Flash MCU, general purpose
Example: HT42B534-1 = USB to UART Bridge, SOP package

BS Series (Body Sensor/Touch)

BS83[LINE][KEYS][VARIANT]-[PACKAGE]
│    │     │      │           │
│    │     │      │           └── Package suffix
│    │     │      └── Variant letter (A, B)
│    │     └── Number of touch keys
│    └── Series 83 (capacitive touch)
└── Body Sensor prefix

Example: BS83B16A-3 = Touch MCU, 16 keys, variant A, SSOP package

Example Decoding

HT66F0185
│  │ │  │
│  │ │  └── Product number 0185
│  │ └── F = Flash MCU
│  └── 66 = General purpose Flash MCU family
└── HT = Holtek prefix

BS83B16A-3
│   │ │ │ │
│   │ │ │ └── -3 = SSOP package
│   │ │ └── A = Variant
│   │ └── 16 = 16 touch keys
│   └── B = Enhanced series
└── BS83 = Body Sensor capacitive touch

Package Codes

Product Families

Flash MCUs (HT66F, HT67F, HT68F)

Touch MCUs (HT45F, BS83)

Voice/Audio ICs (HT82V)

USB Interface (HT42B)

LCD Drivers (HT16xx)

Handler Implementation Notes

Component Type Detection

// Flash MCUs: HT66F, HT67F, HT68F patterns
boolean isFlashMCU = upperMpn.matches("^HT6[678]F\\d+.*");

// Touch MCUs: HT45F and BS83 patterns
boolean isTouchMCU = upperMpn.startsWith("HT45F") ||
                     upperMpn.startsWith("BS83");

// All HT and BS parts are ICs
boolean isIC = upperMpn.startsWith("HT") || upperMpn.startsWith("BS");

Package Code Extraction

// Check suffix-based codes first (-1, -2, -3)
if (upperMpn.endsWith("-3")) return "SSOP";
if (upperMpn.endsWith("-1") || upperMpn.endsWith("-2")) return "SOP";

// Then check inline codes (SS, SOP, NS, QF)
// Must verify position > 4 to avoid false matches

Series Extraction

// HT series extracts family + type
if (upperMpn.startsWith("HT66F")) return "HT66F";
if (upperMpn.startsWith("HT67F")) return "HT67F";
if (upperMpn.startsWith("HT68F")) return "HT68F";

// BS series preserves variant letter
if (upperMpn.startsWith("BS83B")) return "BS83B";
if (upperMpn.startsWith("BS83A")) return "BS83A";
if (upperMpn.startsWith("BS83")) return "BS83";  // Generic fallback

// LCD drivers include full 4-digit series
if (upperMpn.startsWith("HT1621")) return "HT1621";
if (upperMpn.startsWith("HT1628")) return "HT1628";

Product Code Extraction

The handler provides extractProductCode() for getting the full alphanumeric product identifier:

// HT66F0185 -> HT66F0185
// BS83B16A-3 -> BS83B16A (strips package suffix)
// HT1621B -> HT1621B

Related Files

• Handler: manufacturers/HoltekHandler.java
• Component types: MICROCONTROLLER, IC

Helper Methods

The handler provides convenience methods for categorization:

Learnings & Edge Cases

• BS prefix exception: BS83 is Holtek despite different prefix (Body Sensor)
• HT16xx LCD drivers: These are NOT MCUs, just LCD controller drivers
• Touch key count: BS83B16A has 16 keys encoded in part number
• Package suffix variants: -1 and -2 both mean SOP (different internal variants)
• HT67F LCD MCU: Has built-in LCD driver, different from HT1621 standalone driver
• Voice ICs are OTP: HT82V series uses One-Time Programmable memory, not Flash