Diodes Incorporated Manufacturer Skill

Company Overview

Diodes Incorporated is a global manufacturer specializing in discrete semiconductors and analog/mixed-signal ICs. The company acquired Zetex Semiconductors (2008) and Pericom Semiconductor (2015), inheriting their product lines and part numbering conventions. Key product families include:

• Discrete diodes: Signal, Schottky, Zener, TVS
• MOSFETs: N-channel and P-channel in various packages
• Transistors: Small signal BJTs and digital transistors
• Voltage regulators: Linear regulators, LDOs, DC-DC converters
• LED drivers: Constant current drivers
• Interface ICs: USB switches, level translators

MPN Structure by Product Family

MOSFETs - DMN/DMP Series (Diodes Inc Native)

DM[CHANNEL][SPECS][PACKAGE]
 |    |       |       |
 |    |       |       +-- Package suffix (U=SOT23, T=SOT223, L=DPAK, F=TO220)
 |    |       +-- Voltage/current specs (encoded in digits)
 |    +-- N=N-channel, P=P-channel
 +-- DM = Diodes Inc MOSFET

Examples:

• DMN2075U = N-channel, SOT-23, 20V, 7.5A
• DMP3056LDM = P-channel, DPAK, 30V, 5.6A
• DMN6040SSD = N-channel, PowerDI5060, 60V, 4A

MOSFETs - ZXMN/ZXMP Series (Zetex Legacy)

ZXM[CHANNEL][SPECS][SUFFIX]
 |     |       |       |
 |     |       |       +-- Package/variant suffix
 |     |       +-- Voltage/current specifications
 |     +-- N=N-channel, P=P-channel
 +-- ZXM = Zetex MOSFET

Examples:

• ZXMN2B01FH = N-channel, SOT23, 20V
• ZXMN10A07F = N-channel, SOT23, 100V
• ZXMP3A13DN8 = P-channel, SOIC-8, 30V

Transistors - MMBT Series (Small Signal)

MMBT[BASE][SUFFIX]
  |    |      |
  |    |      +-- Grade/packaging suffix (L=low, T1=tape & reel)
  |    +-- Equivalent 2N series number (e.g., 2222, 3904)
  +-- MMBT = Surface mount bipolar transistor (SOT-23)

Examples:

• MMBT2222A = NPN, SOT-23, equivalent to 2N2222A
• MMBT3904 = NPN, SOT-23, general purpose
• MMBT3906 = PNP, SOT-23, general purpose
• MMBT4401 = NPN, SOT-23, 40V
• MMBT4403 = PNP, SOT-23, 40V

Transistors - FMMT Series (RF/High Performance)

FMMT[CODE][SUFFIX]
  |    |      |
  |    |      +-- Grade/variant suffix
  |    +-- Device code
  +-- FMMT = Fast/Medium power transistor

Examples:

• FMMT458 = NPN, high voltage, SOT-23
• FMMT491 = PNP, high gain
• FMMT617 = NPN, RF transistor

Transistors - ZXT/DTA/DTB Series (Digital Transistors)

Digital transistors have built-in base resistors.

ZXT[CODE][SUFFIX]    or    DT[TYPE][CODE][SUFFIX]
 |    |      |              |   |     |      |
 |    |      +-- Package    |   |     |      +-- Package
 |    +-- Device code       |   |     +-- Resistance code
 |                          |   +-- A=NPN, B=PNP
 +-- ZXT = Zetex digital    +-- DT = Digital transistor

Examples:

• ZXT10600E6 = Digital transistor, SC-70
• DTA114ECA = NPN, 10k+10k resistors, SOT-23
• DTB123ECA = PNP, 2.2k+2.2k resistors, SOT-23

Diodes - 1N Series (General Purpose)

1N[CODE][SUFFIX]
 |   |      |
 |   |      +-- Grade suffix (A, B, etc.)
 |   +-- JEDEC registration number
 +-- 1N = JEDEC diode prefix

Examples:

• 1N4148 = High-speed signal diode
• 1N4001 = 50V, 1A rectifier
• 1N4007 = 1000V, 1A rectifier
• 1N5819 = Schottky, 40V, 1A

Diodes - BAV/BAS Series (Signal Diodes)

BA[V/S][CODE][SUFFIX]
 |  |    |      |
 |  |    |      +-- Variant suffix
 |  |    +-- Device code
 |  +-- V=general signal, S=small signal
 +-- BA = European signal diode prefix

Examples:

• BAV19 = High-speed switching diode
• BAV20 = High-speed switching diode
• BAV21 = High-speed switching diode
• BAS16 = High-speed switching diode, SOT-23
• BAS21 = High-speed switching diode, SOT-23

Diodes - SBR Series (Schottky Rectifiers)

SBR[CURRENT][VOLTAGE][SUFFIX]
 |     |        |        |
 |     |        |        +-- Package/variant
 |     |        +-- Voltage / 10 (e.g., 04=40V)
 |     +-- Current rating in Amps
 +-- SBR = Schottky Barrier Rectifier

Examples:

• SBR10U40CT = 10A, 40V, TO-220
• SBR20A100CT = 20A, 100V, TO-220
• SBR3U30LP = 3A, 30V, TO-277

Diodes - BZX Series (Zener Diodes)

BZX[POWER][C][VOLTAGE][SUFFIX]
 |    |    |     |        |
 |    |    |     |        +-- Voltage variant
 |    |    |     +-- Zener voltage code
 |    |    +-- C = precision
 |    +-- Power code (84=500mW, 79=500mW)
 +-- BZX = European Zener prefix

Examples:

• BZX84C5V1 = 5.1V Zener, 300mW, SOT-23
• BZX84C12 = 12V Zener, 300mW, SOT-23
• BZX79C6V2 = 6.2V Zener, 500mW, DO-35

Diodes - MMSZ Series (Surface Mount Zener)

MMSZ[VOLTAGE][SUFFIX]
  |     |        |
  |     |        +-- Package variant (T1=SOD-123)
  |     +-- Zener voltage (e.g., 5V1 = 5.1V)
  +-- MMSZ = Miniature Melf Surface Mount Zener

Examples:

• MMSZ5231B = 5.1V Zener, SOD-123
• MMSZ5242B = 12V Zener, SOD-123
• MMSZ4689 = 5.1V Zener (1N series numbering)

Diodes - DMXX Series (Dual/Surface Mount)

DMX[X][CODE][SUFFIX]
  |  |   |      |
  |  |   |      +-- Package variant
  |  |   +-- Device code
  |  +-- X variant
  +-- DMX = Diodes Inc surface mount dual diodes

Examples:

• DMXX = Dual surface mount diode series

Diodes - MMBD Series (Dual Diodes)

MMBD[CODE][SUFFIX]
  |    |      |
  |    |      +-- Package variant
  |    +-- Device configuration code
  +-- MMBD = Surface mount dual diode

Examples:

• MMBD4148 = Dual 1N4148 equivalent, SOT-23
• MMBD914 = Dual 1N914 equivalent, SOT-23

Voltage Regulators - AP Series (Linear Regulators)

AP[CODE][VARIANT][PACKAGE]
 |   |      |        |
 |   |      |        +-- Package suffix
 |   |      +-- Variant/voltage code
 |   +-- Device family code
 +-- AP = Analog Products (voltage regulator)

Examples:

• AP1117 = 1A LDO regulator series
• AP2112K-3.3 = 600mA LDO, 3.3V output
• AP7333 = 300mA LDO, low quiescent current

Voltage Regulators - AZ Series (LDO Regulators)

AZ[CODE][VARIANT][PACKAGE]
 |   |      |        |
 |   |      |        +-- Package suffix
 |   |      +-- Variant code
 |   +-- Device family code
 +-- AZ = Advanced Zener/LDO regulators

Examples:

• AZ1117CH-3.3TRG1 = 800mA LDO, 3.3V, SOT-223, tape & reel
• AZ1084D2-3.3 = 5A LDO, 3.3V, TO-263

Voltage Regulators - PAM Series (DC-DC Converters)

PAM[CODE][VARIANT][PACKAGE]
 |    |      |        |
 |    |      |        +-- Package suffix
 |    |      +-- Feature variant
 |    +-- Device code
 +-- PAM = Power Analog Module

Examples:

• PAM2305AAB120 = DC-DC step-down, 1A, 1.2V
• PAM8403 = Audio amplifier IC
• PAM8610 = Class-D audio amplifier

LED Drivers - AL Series

AL[CODE][VARIANT][PACKAGE]
 |   |      |        |
 |   |      |        +-- Package suffix
 |   |      +-- Feature variant
 |   +-- Device code
 +-- AL = Analog LED driver

Examples:

• AL8805 = Buck LED driver, 40V, 1A
• AL8807 = Buck LED driver, 36V, 500mA

Interface ICs - PI Series

PI[CODE][VARIANT][PACKAGE]
 |   |      |        |
 |   |      |        +-- Package suffix
 |   |      +-- Feature variant
 |   +-- Device code
 +-- PI = Pericom Interface IC

Examples:

• PI3USB30532 = USB 3.0 switch
• PI3EQX = PCIe/USB ReDriver ICs

Package Codes

MOSFET Package Extraction (from handler)

Common Packages

Supported Component Types

From DiodesIncHandler.getSupportedTypes():

Note: Handler declares types for Hall sensors, LED drivers, Logic ICs but currently only registers patterns for DIODE, MOSFET, TRANSISTOR, VOLTAGE_REGULATOR, and IC component types.

Series Extraction

The handler extracts series based on prefix matching:

Official Replacement Cross-References

The handler defines these replacement pairs:

Handler Implementation Notes

Current Issues in DiodesIncHandler

1. HashSet usage (line 64): Uses mutable HashSet instead of Set.of() for immutability
2. Type declaration mismatch: Declares HALL_SENSOR_DIODES, LED_DRIVER_DIODES, LOGIC_IC_DIODES in getSupportedTypes() but does not register patterns for corresponding base types
3. Missing DIODE in getSupportedTypes(): Registers many DIODE patterns but doesn't include base DIODE type in supported types
4. Missing TRANSISTOR in getSupportedTypes(): Registers transistor patterns but doesn't include TRANSISTOR type
5. Limited package extraction: Only handles DMN/DMP and ZX prefixes, missing other series

Missing Patterns

The handler does not currently register patterns for:

• Hall effect sensors (no AH series patterns)
• Logic ICs (only PI series for interface ICs)
• Additional LED driver patterns beyond AL series

Recommended Fixes

// 1. Change getSupportedTypes() to use Set.of()
@Override
public Set<ComponentType> getSupportedTypes() {
    return Set.of(
        ComponentType.DIODE,
        ComponentType.MOSFET,
        ComponentType.MOSFET_DIODES,
        ComponentType.TRANSISTOR,
        ComponentType.VOLTAGE_REGULATOR,
        ComponentType.VOLTAGE_REGULATOR_DIODES,
        ComponentType.LED_DRIVER_DIODES,
        ComponentType.LOGIC_IC_DIODES,
        ComponentType.HALL_SENSOR_DIODES,
        ComponentType.IC
    );
}

// 2. Add Hall sensor patterns
registry.addPattern(ComponentType.HALL_SENSOR, "^AH[0-9].*");  // Hall sensors
registry.addPattern(ComponentType.HALL_SENSOR_DIODES, "^AH[0-9].*");

// 3. Improve package extraction for more series
if (upperMpn.startsWith("MMBT")) return "SOT-23";
if (upperMpn.startsWith("BZX84")) return "SOT-23";
if (upperMpn.startsWith("MMSZ")) return "SOD-123";
if (upperMpn.startsWith("1N")) return "DO-41";

Example MPNs with Full Decoding

DMN2075U (N-channel MOSFET)

DMN2075U
│  │   │
│  │   └── U = SOT-23 package
│  └── 2075 = 20V, 7.5A specs
└── DMN = Diodes Inc N-channel MOSFET

MMBT3904LT1G (NPN Transistor)

MMBT3904LT1G
│     │  │││
│     │  ││└── G = Green/RoHS
│     │  │└── T1 = Tape & reel
│     │  └── L = Low saturation variant
│     └── 3904 = equivalent to 2N3904
└── MMBT = Surface mount bipolar transistor (SOT-23)

BZX84C5V1-7-F (Zener Diode)

BZX84C5V1-7-F
│  │ ││  │ │
│  │ ││  │ └── F = Automotive grade
│  │ ││  └── 7 = Tape orientation code
│  │ │└── 5V1 = 5.1V Zener voltage
│  │ └── C = Precision grade
│  └── 84 = 300mW power rating
└── BZX = European Zener diode prefix

AP2112K-3.3TRG1 (LDO Regulator)

AP2112K-3.3TRG1
│  │   │ │  │││
│  │   │ │  ││└── G1 = Lead-free version
│  │   │ │  │└── R = Tape & reel
│  │   │ │  └── T = SOT-23-5 package
│  │   │ └── 3.3 = 3.3V output voltage
│  │   └── K = Version with enable pin
│  └── 2112 = 600mA LDO series
└── AP = Analog Products (voltage regulator)

Related Files

• Handler: manufacturers/DiodesIncHandler.java
• Component types: MOSFET_DIODES, VOLTAGE_REGULATOR_DIODES, LED_DRIVER_DIODES, LOGIC_IC_DIODES, HALL_SENSOR_DIODES

Learnings & Edge Cases

• Zetex acquisition: Diodes Inc acquired Zetex in 2008, inheriting ZXMN/ZXMP MOSFET nomenclature
• Pericom acquisition: Diodes Inc acquired Pericom in 2015, inheriting PI interface IC series
• JEDEC standards: 1N prefix and 2N prefix follow JEDEC numbering (no encoded specs in number)
• European prefixes: BA, BZ prefixes follow European Pro Electron naming conventions
• Package suffix position: For DMN/DMP series, package code comes after last digit; for ZETEX parts, it varies
• BAV19/BAV20 interchangeability: These are considered compatible signal diodes by the handler
• ZXMN to DMN migration: Handler recognizes Zetex ZXMN series as equivalent to Diodes Inc DMN series