Allegro MicroSystems Manufacturer Skill

Allegro MicroSystems Manufacturer Skill

MPN Structure

Allegro MPNs follow this general structure:

[FAMILY][SERIES][PACKAGE][VARIANT]-[RATING]-[SUFFIX]
   │       │       │        │         │        │
   │       │       │        │         │        └── T = Tape/​Reel, Pb-free
   │       │       │        │         └── Current rating (05B = 5A bidirectional)
   │       │       │        └── TR = Tape and Reel
   │       │       └── Package code (ELC, LLC, SE, etc.)
   │       └── Series number (712, 723, 4988, etc.)
   └── Family prefix (ACS, A, AH, AAS)

Example Decoding

ACS712ELCTR-05B-T
│  │  │   │  │  │
│  │  │   │  │  └── T = Pb-free/​Tape and Reel qualifier
│  │  │   │  └── 05B = 5A bidirectional current sensing
│  │  │   └── TR = Tape and Reel packaging
│  │  └── ELC = SOIC-8 package
│  └── 712 = Series number
└── ACS = Current Sensor family

A4988SETTR-T
│    │   │
│    │   └── T = Tape and Reel
│    └── SETTR = QFN package, Tape and Reel
└── A4988 = Stepper motor driver

A1324LLHLT-T
│    │    │
│    │    └── T = Tape and Reel
│    └── LLHLT = SOT-23 package (LLH), Tape and Reel
└── A1324 = Linear Hall effect sensor

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Package Codes

Current Sensors (ACS7xx, ACS37xxx)

Motor Drivers (A3xxx, A4xxx, A5xxx)

Hall Sensors (A1xxx, AH series)

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Family Prefixes

Current Sensors

Motor Drivers

Hall Effect Sensors

LED Drivers

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Current Sensor Rating Codes

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Common Series Reference

Current Sensors (most popular)

Motor Drivers (most popular)

Hall Sensors

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Handler Implementation Notes

Package Code Extraction

// Current sensors use letter codes after series number
// ACS712ELCTR -> ELC = SOIC-8
// ACS723LLCTR -> LLC = SOIC-8 (leadless)
// ACS723KLCTR -> KLC = SOIC-8-EP (enhanced thermal pad)

// Motor drivers use suffix codes
// A4988SETTR -> SET = QFN
// A3967SLBT -> SLB = SOIC-24

// Hall sensors use suffix codes
// A1324LUA -> LUA = SIP-3
// A1324LLH -> LLH = SOT-23

Series Extraction

// Current sensors: Extract full ACSxxx or ACS3xxxx
// ACS712ELCTR-05B-T -> ACS712
// ACS37612LLCATR-030B5-T -> ACS37612

// Motor drivers: Extract Axxxx (5 chars)
// A4988SETTR-T -> A4988
// A3967SLBT -> A3967

// Hall sensors: Extract A1xxx (5 chars) or AHxxxx (6 chars)
// A1324LUA-T -> A1324
// AH3362Q -> AH3362

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Related Files

• Handler: manufacturers/​AllegroHandler.java
• Component types: SENSOR_CURRENT, MOTOR_DRIVER, HALL_SENSOR, LED_DRIVER, SENSOR, IC
• Test: handlers/​AllegroHandlerTest.java

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Learnings & Edge Cases

• ACS712 is extremely common - Found in nearly every Arduino/​hobbyist current sensing project
• A4988 is the de facto standard - Used in most 3D printers (Prusa, Creality, etc.)
• Package code position varies - Current sensors embed it in part number, motor drivers use suffixes
• LLC vs ELC - Both are SOIC-8; LLC is leadless variant with same footprint
• KLC = Enhanced thermal - SOIC-8-EP with exposed thermal pad for better heat dissipation
• TR suffix - Appears before final -T suffix, indicates tape and reel (e.g., ELCTR = ELC + TR)
• -T suffix meaning varies - Can mean tape/​reel OR Pb-free; Allegro uses it for both
• Current rating codes - B = bidirectional, U = unidirectional, A often appears in newer sensors

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