WM8731CLSEFL/R Equivalent & Substitute Parts

Part Overview

The WM8731CLSEFL/R is a portable internet audio codec manufactured by Cirrus Logic Inc., designed for audio interface applications requiring 24-bit serial data processing. This device integrates 2 ADCs and 2 DACs with Sigma Delta modulation, delivering 90 dB S/N ratio on the ADC side and 100 dB on the DAC side. The part is classified as Obsolete, necessitating identification of active substitute components for new designs and ongoing production requirements.

Substiute Parts

WM8731CLSEFL/R

Cirrus Logic Inc.In Stock: 37495WM8731CLSEFL/R Datasheet

Current PartRFQ

WM8904CGEFL/RV

Cirrus Logic Inc.In Stock: 110416WM8904CGEFL/RV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WM8731CLSEFL/R is determined by the following critical parameters:

• 24-bit audio resolution capability
• Dual ADC and dual DAC configuration
• Sigma Delta modulation architecture
• Serial data interface for audio processing
• Surface mount QFN package format
• Operating temperature range of -40°C to 85°C
• Supply voltage compatibility within specified ranges
• RoHS and REACH compliance status

The WM8904CGEFL/RV qualifies as a substitute based on matching these core functional and electrical parameters, while maintaining compatibility with the same manufacturing standards and environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The WM8904CGEFL/RV is an active product from Cirrus Logic Inc. and serves as the primary substitute for the obsolete WM8731CLSEFL/R. Both components maintain identical operating temperature ranges and comply with RoHS and REACH regulations. The substitute offers improved ADC S/N ratio performance (91 dB versus 90 dB) and maintains equivalent DAC performance at 96 dB.

Key considerations for selection:

• The WM8904CGEFL/RV operates with a narrower analog supply voltage range (1.71V ~ 2V) compared to the WM8731CLSEFL/R (1.8V ~ 3.6V). Design power supply specifications must accommodate this constraint.
• Package format differs: 28-QFN (5x5) versus 32-QFN (4x4). PCB layout modifications are required.
• Moisture sensitivity classification increases from MSL 1 to MSL 3, affecting storage and handling procedures.
• The substitute is currently in active production with higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the WM8904CGEFL/RV directly replace the WM8731CLSEFL/R without PCB modifications?

A: No. The package formats differ (28-QFN versus 32-QFN), requiring PCB layout redesign. Pin configurations and footprints are not identical.

Q: What is the impact of the narrower analog supply voltage range on the WM8904CGEFL/RV?

A: The substitute requires analog supply voltage between 1.71V and 2V, whereas the original part accepts 1.8V to 3.6V. Power supply design must be adjusted to operate within the substitute's specifications.

Q: Are there compliance differences between the two parts?

A: Both parts are REACH Unaffected and comply with RoHS standards. The substitute meets ROHS3 compliance, while the original is RoHS Compliant. Both maintain EAR99 ECCN classification.

Q: How does the moisture sensitivity level change affect component handling?

A: The WM8731CLSEFL/R has MSL 1 (unlimited shelf life), while the WM8904CGEFL/RV has MSL 3 (168-hour floor life after moisture exposure). Storage and handling procedures must follow stricter moisture control protocols for the substitute.

Q: Are the audio performance specifications equivalent?

A: The WM8904CGEFL/RV provides slightly improved ADC S/N ratio (91 dB versus 90 dB). DAC S/N ratio is comparable (96 dB versus 100 dB on the original). Both maintain 24-bit resolution with dual ADC/DAC configuration and Sigma Delta modulation.

Q: What is the inventory status for each part?

A: The WM8731CLSEFL/R (obsolete) has 37,483 pieces available. The WM8904CGEFL/RV (active) has 110,362 pieces in stock, providing greater long-term availability for production requirements.