WM8953ECS/RV Equivalent & Substitute Parts

Part Overview

The WM8953ECS/RV is a 24-bit audio ADC with 4-channel configuration and 48 kHz sampling rate, manufactured by Cirrus Logic Inc. in a 42-WLCSP package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across analog and digital supply voltages (1.71V to 3.6V) and supports DSP and I2S data interfaces, serving applications requiring high-resolution audio acquisition.

Substiute Parts

WM8953ECS/RV

Cirrus Logic Inc.In Stock: 2248WM8953ECS/RV Datasheet

Current PartRFQ

CS53L30-CNZ

Cirrus Logic Inc.In Stock: 9004CS53L30-CNZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WM8953ECS/RV is determined by the following critical parameters:

Core Functional Requirements:

• Audio ADC type with 24-bit resolution
• 4-channel configuration
• I2S data interface compatibility (primary interface for audio applications)
• Surface mount technology

Electrical Compatibility Criteria:

• Supply voltage overlap within specified operating ranges
• Operating temperature range sufficient for application requirements
• Moisture sensitivity classification

Mechanical Compatibility:

• Package footprint and pinout compatibility
• Surface mount assembly process compatibility

The CS53L30-CNZ is identified as a manufacturer-recommended substitute. While this part operates at a reduced sampling rate (16 kHz versus 48 kHz) and narrower supply voltage range (1.71V to 1.89V), it maintains the core functional characteristics: 24-bit resolution, 4-channel configuration, I2S interface, and surface mount packaging. Applications requiring the full 48 kHz sampling capability of the original part may require design evaluation.

Parameter Comparison

Engineering Selection Recommendations

Selection between the WM8953ECS/RV and CS53L30-CNZ must account for the following factors:

Sampling Rate Compatibility: The WM8953ECS/RV operates at 48 kHz, while the CS53L30-CNZ is limited to 16 kHz. Applications requiring full 48 kHz audio bandwidth cannot use the substitute without signal processing modifications.

Supply Voltage Requirements: The WM8953ECS/RV accepts supply voltages from 1.71V to 3.6V, whereas the CS53L30-CNZ operates only within 1.71V to 1.89V. Systems designed for higher supply voltages (above 1.89V) cannot directly use the substitute without voltage regulation modifications.

Operating Temperature Range: The WM8953ECS/RV supports -40°C to 85°C operation, while the CS53L30-CNZ is rated -10°C to 70°C. Applications requiring extended low-temperature operation below -10°C or high-temperature operation above 70°C are incompatible with the substitute.

Package and Footprint: The WM8953ECS/RV uses a 42-WLCSP package, while the CS53L30-CNZ uses a 32-VFQFN package. PCB layout and assembly tooling must be re-qualified for the different package geometry.

Regulatory Compliance: Both parts maintain REACH Unaffected status and EAR99 classification, ensuring equivalent compliance posture.

Frequently Asked Questions (FAQ)

Q: Can the CS53L30-CNZ directly replace the WM8953ECS/RV in existing designs?

A: Direct replacement is not possible without design modifications. The substitute operates at 16 kHz sampling rate versus 48 kHz, has a narrower supply voltage range (1.71V to 1.89V versus 1.71V to 3.6V), and uses a different package (32-VFQFN versus 42-WLCSP). PCB layout changes and firmware adjustments are required.

Q: What is the primary limitation when using CS53L30-CNZ as a substitute?

A: The reduced sampling rate from 48 kHz to 16 kHz is the primary functional limitation. This restricts audio bandwidth to approximately 8 kHz, suitable only for narrowband audio applications such as voice communication, not full-spectrum audio acquisition.

Q: Are there supply voltage compatibility issues between these parts?

A: Yes. The CS53L30-CNZ operates only within 1.71V to 1.89V, a subset of the WM8953ECS/RV range (1.71V to 3.6V). Systems using supply voltages above 1.89V require additional voltage regulation to use the substitute.

Q: Do both parts require identical PCB layout considerations?

A: No. The different packages (42-WLCSP versus 32-VFQFN) have different footprints, pin counts, and thermal characteristics. PCB layout must be redesigned and re-qualified for the substitute part.

Q: What is the temperature operating range difference?

A: The WM8953ECS/RV operates from -40°C to 85°C, while the CS53L30-CNZ operates from -10°C to 70°C. Applications requiring operation below -10°C or above 70°C cannot use the substitute.

Q: Are both parts subject to the same regulatory requirements?

A: Yes. Both parts maintain REACH Unaffected status and EAR99 export classification, ensuring equivalent regulatory compliance.

Q: What data interface compatibility exists between these parts?

A: Both parts support I2S interface. The WM8953ECS/RV additionally supports DSP interface, which is not available on the CS53L30-CNZ. Applications using DSP interface must be redesigned to use I2S only.