Cirruslogic

Example Decoding (CS Series)

CS4344-CZZ
│  │   │
│  │   └── CZZ = TSSOP package
│  └── 4344 = Stereo DAC
└── CS = Cirrus Logic prefix

CS43L22-CNZ
│  │    │
│  │    └── CNZ = QFN package
│  └── 43L22 = Low-power stereo DAC/headphone amp
└── CS = Cirrus Logic prefix

CS8416-DZZ
│  │   │
│  │   └── DZZ = SSOP package
│  └── 8416 = Digital Audio Interface Receiver
└── CS = Cirrus Logic prefix

Wolfson WM8xxx Series

WM8 [SERIES] [PACKAGE]
│     │         │
│     │         └── Package suffix (SEDS, CGEFL, etc.)
│     └── Series number (731=basic codec, 960=advanced, 994=flagship)
└── Wolfson prefix (now Cirrus Logic)

Example Decoding (Wolfson Series)

WM8731SEDS
│   │   │
│   │   └── SEDS = SOIC package
│   └── 8731 = Low-power stereo codec
└── WM8 = Wolfson prefix

WM8960CGEFL
│   │    │
│   │    └── CGEFL = QFN with exposed pad
│   └── 8960 = Low-power stereo codec (advanced)
└── WM8 = Wolfson prefix

Product Series Reference

CS42xx - Audio ADCs

CS43xx - Audio DACs/CODECs

CS47xx - DSP Audio

CS48xx - SoundClear DSP

CS53xx - LED Drivers

CS84xx - Digital Audio Interface

WM8xxx - Wolfson Audio (Acquired)

Package Codes

CS Series Package Codes

Package Code Patterns (CS Series)

Wolfson WM8xxx Package Codes

Wolfson Package Code Patterns

Note: The /V suffix indicates a lead-free (RoHS compliant) variant.

Supported Component Types

The CirrusLogicHandler supports:

Note: The handler registers all patterns under ComponentType.IC since Cirrus Logic's product portfolio is exclusively audio/analog ICs.

Handler Implementation Notes

Package Code Extraction

// CS series: Extract suffix after hyphen
// CS4344-CZZ → suffix="CZZ" → TSSOP
int dashIndex = mpn.indexOf('-');
if (dashIndex > 0) {
    String suffix = mpn.substring(dashIndex + 1);
    return decodePackageCode(suffix);
}

// CS series without hyphen: Find trailing letter suffix
// CS43L22CNZ → extract "CNZ" → QFN

// WM8xxx series: No hyphen, suffix follows part number
// WM8731SEDS → extract "SEDS" after "8731" → SOIC
// WM8960CGEFL → extract "CGEFL" after "8960" → QFN

Series Extraction

// CS series: First 4 characters
// CS4344-CZZ → "CS43"
// CS8416-DZZ → "CS84"

// WM8xxx series: First 4 characters
// WM8731SEDS → "WM87"
// WM8960CGEFL → "WM89"

Pattern Matching

// CS series patterns (all register under IC)
"^CS42[0-9]{2}.*"        // Audio ADCs (CS4270, CS4272)
"^CS43[0-9A-Z]{2,4}.*"   // Audio DACs/CODECs (CS4344, CS43L22)
"^CS47[0-9A-Z]{2,4}.*"   // DSP Audio (CS47L24, CS47L35)
"^CS48[0-9]{2,3}.*"      // SoundClear DSP
"^CS53[0-9]{2}.*"        // LED Drivers
"^CS84[0-9]{2}.*"        // Digital Audio Interface

// Wolfson patterns
"^WM8[0-9]{3}.*"         // WM8xxx series (WM8731, WM8960)
"^WM89[0-9]{2}.*"        // WM89xx series (more specific)

Replacement Compatibility

The handler implements isOfficialReplacement() with these rules:

Same Base Part Number

Parts with the same base part number but different packages are compatible:

• CS4344-CZZ and CS4344-CNZ (same part, TSSOP vs QFN)
• WM8731SEDS and WM8731CGEFL (same part, SOIC vs QFN)

Series Compatibility

Parts must have the same base part number to be considered compatible. Different part numbers within the same series (e.g., CS4334 vs CS4344) are NOT automatically marked as compatible because they may have different specifications.

Example MPNs

CS Series Examples

Wolfson WM8xxx Examples

Related Files

• Handler: manufacturers/CirrusLogicHandler.java
• Component types: IC
• Manufacturer enum: ComponentManufacturer.CIRRUS_LOGIC

Learnings & Quirks

Wolfson Acquisition

• Cirrus Logic acquired Wolfson Microelectronics in 2014
• WM8xxx series products are still manufactured under the original part numbers
• Both CS and WM prefixes are valid Cirrus Logic parts

Package Code Extraction

• CS series uses hyphen-separated suffixes (CS4344-CZZ)
• Some CS parts may have package code embedded without hyphen
• WM8xxx series never uses hyphen - package immediately follows part number
• Wolfson /V suffix indicates lead-free (RoHS) variant

Series Numbering

• CS42xx = Audio ADCs
• CS43xx = Audio DACs and CODECs (largest product family)
• CS47xx = DSP Audio (Smart Codecs)
• CS48xx = SoundClear DSP
• CS53xx = LED Drivers (not audio, but same prefix convention)
• CS84xx = Digital Audio Interface (S/PDIF, I2S)

Pattern Overlap Prevention

• WM8xxx pattern ^WM8[0-9]{3}.* is specific enough to avoid conflicts
• CS patterns use two-digit series identifiers (42, 43, 47, etc.)
• The CS43 pattern ^CS43[0-9A-Z]{2,4}.* handles both CS4344 and CS43L22

Part Number Variants

• CS43Lxx parts (like CS43L22) include "L" for low-power variants
• These are handled by the pattern [0-9A-Z]{2,4} which allows letters

Handler Only Uses IC Type

• Unlike handlers for manufacturers with diverse products, CirrusLogicHandler only supports ComponentType.IC
• This is appropriate since Cirrus Logic exclusively manufactures audio/analog ICs