WM8903CLGEFK Equivalent & Substitute Parts

Part Overview

The WM8903CLGEFK is a stereo audio codec interface manufactured by Cirrus Logic Inc., designed for low-power audio applications requiring 24-bit resolution with integrated analog-to-digital and digital-to-analog conversion. This component operates across a wide supply voltage range and supports stereo audio processing in a compact 40-QFN (5x5) package.

The WM8903CLGEFK is classified as obsolete. Due to its discontinued status, equivalent substitute parts from the WM8904 series are available to maintain design continuity and ensure supply chain reliability for new production runs and legacy system updates.

Substiute Parts

WM8903CLGEFK

Cirrus Logic Inc.In Stock: 677WM8903CLGEFK Datasheet

Current PartRFQ

WM8904CGEFL/RV

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

MFR RecommendedRFQ

WM8904CGEFL/V

Cirrus Logic Inc.In Stock: 3591WM8904CGEFL/V Datasheet

MFR RecommendedRFQ

WM8904ECS/R

Cirrus Logic Inc.In Stock: 17220WM8904ECS/R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WM8903CLGEFK is determined by the following critical parameters that must remain consistent across equivalent parts:

• Stereo audio codec functionality with 2 ADCs and 2 DACs
• 24-bit resolution capability
• Sigma Delta modulation architecture
• Analog supply voltage range: 1.71V ~ 2V
• Digital supply voltage range: 1.42V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Surface mount technology
• Manufacturer: Cirrus Logic Inc.

The WM8904 series satisfies these core requirements across three package variants: 32-QFN (4x4), and 36-WCSP (2.65x2.53). All substitute parts maintain identical signal-to-noise ratios and supply voltage specifications, ensuring functional equivalence in audio codec applications.

Parameter Comparison

Engineering Selection Recommendations

All three WM8904 variants are active products with ROHS3 compliance, providing long-term supply chain stability compared to the obsolete WM8903CLGEFK. Selection among substitute parts depends on package footprint requirements and moisture sensitivity constraints:

WM8904CGEFL/RV (32-QFN, Cut Tape packaging) offers the highest inventory availability (110,362 units) with MSL 3 rating suitable for standard manufacturing environments.

WM8904CGEFL/V (32-QFN, Tray packaging) provides the same electrical specifications with reduced inventory (3,579 units) and identical MSL 3 rating.

WM8904ECS/R (36-WCSP) delivers the smallest footprint (2.65x2.53 mm) with MSL 1 rating for moisture-sensitive applications, supported by 17,153 units in inventory.

Package geometry differences require PCB layout modifications. The 40-QFN (5x5) footprint of the WM8903CLGEFK differs from the 32-QFN (4x4) and 36-WCSP alternatives, necessitating design review before implementation.

Frequently Asked Questions (FAQ)

Q: Can WM8904 series parts directly replace the WM8903CLGEFK without design changes?

A: Electrical specifications are compatible, but package geometry differs. The WM8903CLGEFK uses a 40-QFN (5x5) package, while WM8904 variants use either 32-QFN (4x4) or 36-WCSP (2.65x2.53) packages. PCB layout and routing modifications are required.

Q: What is the difference between WM8904CGEFL/RV and WM8904CGEFL/V?

A: Both parts are electrically identical 32-QFN packages with the same electrical specifications and MSL 3 rating. The difference is packaging format: WM8904CGEFL/RV is supplied in Cut Tape (CT) & Digi-Reel format, while WM8904CGEFL/V is supplied in Tray format.

Q: Why does WM8904ECS/R have MSL 1 while the other WM8904 variants have MSL 3?

A: MSL rating reflects moisture sensitivity during storage and handling. WM8904ECS/R in 36-WCSP package has unlimited moisture exposure tolerance (MSL 1), while 32-QFN variants (WM8904CGEFL/RV and WM8904CGEFL/V) are limited to 168 hours of moisture exposure (MSL 3) before reflow soldering.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three WM8904 variants are ROHS3 compliant. The original WM8903CLGEFK compliance status is not specified in available documentation.

Q: What is the ADC signal-to-noise ratio difference between WM8903CLGEFK and WM8904 substitutes?

A: The WM8903CLGEFK ADC S/N ratio is 92 dB typical, while WM8904 series ADCs deliver 91 dB typical. This 1 dB difference is within typical manufacturing tolerance and does not affect functional equivalence in standard audio applications.

Q: Which substitute part should be selected for space-constrained applications?

A: WM8904ECS/R in 36-WCSP (2.65x2.53 mm) package provides the smallest footprint. This variant also offers MSL 1 rating for applications with extended storage or high-humidity manufacturing environments.