holtek

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

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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