Cantara/holtek

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

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Package Codes

| Code | Package | Notes | |------|---------|-------| | -1 | SOP | Standard SOP | | -2 | SOP | SOP variant | | -3 | SSOP | Shrink SOP | | SS | SSOP | Inline suffix | | SOP | SOP | Inline suffix | | NS | NSOP | Narrow SOP | | QF | QFP | Quad Flat Package | | DIP | DIP | Through-hole |

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Product Families

Flash MCUs (HT66F, HT67F, HT68F)

| Series | Type | Key Features | |--------|------|--------------| | HT66F | General Flash MCU | General purpose, up to 64KB Flash | | HT67F | LCD Flash MCU | Built-in LCD driver | | HT68F | Enhanced I/O MCU | More GPIO pins |

Touch MCUs (HT45F, BS83)

| Series | Type | Key Features | |--------|------|--------------| | HT45F | Touch Key MCU | Capacitive touch sensing | | BS83A | Touch MCU | Basic capacitive touch | | BS83B | Enhanced Touch MCU | More touch channels |

Voice/Audio ICs (HT82V)

| Series | Type | Key Features | |--------|------|--------------| | HT82V739 | Voice Synthesis | OTP voice IC |

USB Interface (HT42B)

| Series | Type | Key Features | |--------|------|--------------| | HT42B534 | USB-UART Bridge | USB to serial converter |

LCD Drivers (HT16xx)

| Series | Type | Key Features | |--------|------|--------------| | HT1621 | LCD Controller | 32x4 segment LCD | | HT1621B | LCD Controller | Enhanced HT1621 | | HT1628 | LED/LCD Controller | Combined LED and LCD |

---

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

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Related Files

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

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Helper Methods

The handler provides convenience methods for categorization:

| Method | Purpose | |--------|---------| | isTouchMCU(mpn) | Returns true for HT45F and BS83 series | | isFlashMCU(mpn) | Returns true for HT66F, HT67F, HT68F | | isLCDDriver(mpn) | Returns true for HT16xx series | | isVoiceIC(mpn) | Returns true for HT82V series | | isUSBIC(mpn) | Returns true for HT42B series |

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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

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