WM8940CGEFL/V Equivalent & Substitute Parts

Part Overview

The WM8940CGEFL/V is a mono audio codec interface IC manufactured by Cirrus Logic Inc., designed for audio signal processing applications requiring serial data interface with 24-bit resolution. This component integrates a single ADC and DAC with Sigma Delta modulation, delivering 94 dB signal-to-noise ratio on the ADC and 98 dB on the DAC. The part is currently classified as obsolete, which necessitates identification of active equivalent components to maintain design continuity and ensure long-term supply chain reliability for new production runs and legacy system support.

Substiute Parts

WM8940CGEFL/V

Cirrus Logic Inc.In Stock: 1052WM8940CGEFL/V Datasheet

Current PartRFQ

WM8940KGEFL/V

Cirrus Logic Inc.In Stock: 1383WM8940KGEFL/V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WM8940CGEFL/V is determined by strict equivalence across the following critical parameters:

• Base Product Number: Both parts must share the WM8940 base designation, ensuring identical die and core functionality
• Data Interface: Serial interface requirement must be maintained
• Resolution: 24-bit resolution specification is non-negotiable
• ADC/DAC Configuration: Single ADC and single DAC topology must be preserved
• Sigma Delta Architecture: Sigma Delta modulation must be present
• Signal-to-Noise Ratio: ADC 94 dB and DAC 98 dB typical performance must be matched
• Supply Voltage Ranges: Analog supply (2.5V ~ 3.6V) and digital supply (1.71V ~ 3.6V) must be identical
• Operating Temperature Range: -25°C ~ 85°C specification must be maintained
• Package Type: 24-VFQFN Exposed Pad in 24-QFN (4x4) form factor is required
• Compliance Standards: ROHS3 compliance and REACH unaffected status must be preserved

The WM8940KGEFL/V meets all substitution criteria and is classified as the manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The WM8940KGEFL/V is the direct substitute for the obsolete WM8940CGEFL/V. Both components are manufactured by Cirrus Logic Inc. and share identical electrical specifications, package geometry, and compliance certifications. The primary distinction is product status: the WM8940CGEFL/V is obsolete, while the WM8940KGEFL/V maintains active production status, ensuring continued availability and supply chain stability.

For new designs and production runs requiring mono audio codec functionality with 24-bit serial interface, the WM8940KGEFL/V is the appropriate selection. For legacy system maintenance where the original WM8940CGEFL/V is no longer available, the WM8940KGEFL/V provides pin-for-pin and functional equivalence with no design modifications required.

Both parts comply with ROHS3 standards and maintain REACH unaffected status, satisfying regulatory requirements for electronic component deployment in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can the WM8940KGEFL/V be used as a direct replacement for the WM8940CGEFL/V?

A: Yes. The WM8940KGEFL/V is electrically and mechanically equivalent to the WM8940CGEFL/V. Both components feature identical 24-bit serial audio codec architecture, supply voltage requirements, operating temperature range, and 24-QFN (4x4) package configuration. No circuit modifications or PCB redesign is necessary.

Q: What is the difference between the WM8940CGEFL/V and WM8940KGEFL/V?

A: The components are functionally identical. The primary difference is product lifecycle status: WM8940CGEFL/V is classified as obsolete, while WM8940KGEFL/V maintains active production. The packaging differs only in distribution format (WM8940CGEFL/V in standard packaging versus WM8940KGEFL/V in tray packaging).

Q: Are there any compatibility concerns when substituting the WM8940KGEFL/V for the WM8940CGEFL/V?

A: No compatibility concerns exist. Both parts share identical pin assignments, electrical characteristics, and thermal specifications. PCB footprints are identical, and no firmware or software modifications are required.

Q: What compliance certifications apply to both parts?

A: Both the WM8940CGEFL/V and WM8940KGEFL/V comply with ROHS3 standards and maintain REACH unaffected status. Moisture sensitivity level is rated at MSL 3 (168 hours) for both components.

Q: Why is the WM8940CGEFL/V classified as obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The WM8940KGEFL/V represents the active continuation of this product line, ensuring ongoing availability and support for applications requiring mono audio codec functionality.