CS47L85-CWZR Equivalent & Substitute Parts

Part Overview

The CS47L85-CWZR is a low-power audio digital signal processor (DSP) for smart devices manufactured by Cirrus Logic Inc. This embedded integrated circuit operates at 900 MIPS and supports multiple audio interfaces including I2C, SLIMbus, and SPI. The part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. Alternative parts must maintain compatibility with the core audio processing architecture and interface specifications.

Substiute Parts

CS47L85-CWZR

Cirrus Logic Inc.In Stock: 799CS47L85-CWZR Datasheet

Current PartRFQ

CS47L35-CWZR

Cirrus Logic Inc.In Stock: 10169CS47L35-CWZR Datasheet

MFR RecommendedRFQ

CS47L90-CWZR

Cirrus Logic Inc.In Stock: 11827CS47L90-CWZR Datasheet

MFR RecommendedRFQ

WM8281ECS/R

Cirrus Logic Inc.In Stock: 16431WM8281ECS/R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS47L85-CWZR is determined by the following critical parameters:

• Interface Compatibility: All substitute parts must support I2C, SLIMbus, and SPI protocols
• Voltage Specifications: Core voltage of 1.20V and I/O voltage range compatibility
• Operating Temperature Range: -40°C to 85°C minimum requirement
• Mounting and Package Type: Surface mount with WLCSP packaging technology
• Compliance Standards: RoHS and REACH compliance status

The three qualified substitute parts (CS47L35-CWZR, CS47L90-CWZR, and WM8281ECS/R) meet these core substitution criteria while offering variations in processing capability, voltage flexibility, and package density.

Parameter Comparison

Engineering Selection Recommendations

CS47L35-CWZR: This active substitute offers reduced processing capability at 450 MIPS compared to the original 900 MIPS specification. It maintains full interface compatibility (I2C, SLIMbus, SPI) and operates within the required temperature range. The smaller 101-UFBGA package reduces board space requirements. ROHS3 compliance provides enhanced environmental standards. Selection is appropriate for applications where processing demands are lower than the original design.

CS47L90-CWZR: This active substitute provides enhanced processing capability at 975 MIPS, exceeding the original 900 MIPS specification. It maintains full interface compatibility and offers expanded I/O voltage support (1.8V to 3.3V range). The 173-UFBGA package is comparable in size to the original. ROHS3 compliance and active product status ensure long-term availability. Selection is appropriate for applications requiring higher processing performance or greater voltage flexibility.

WM8281ECS/R: This active substitute operates as an audio codec with SLIMbus interface support. It differs from the original in that it specifies only SLIMbus rather than the full I2C, SLIMbus, and SPI interface set. The 138-WFBGA package is intermediate in size. ROHS3 compliance and active product status ensure availability. Selection requires confirmation that SLIMbus-only operation meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can CS47L35-CWZR replace CS47L85-CWZR in all applications?

A: CS47L35-CWZR maintains interface compatibility (I2C, SLIMbus, SPI) and operating temperature range. However, its 450 MIPS processing capability is half that of the original 900 MIPS specification. Substitution is valid only for applications where reduced processing performance is acceptable.

Q: What are the key differences between CS47L90-CWZR and the original CS47L85-CWZR?

A: CS47L90-CWZR provides higher processing capability (975 MIPS vs. 900 MIPS) and expanded I/O voltage support (1.8V to 3.3V range vs. 1.2V, 1.8V, 3.6V). Both maintain identical interface support and operating temperature specifications. The package size is comparable.

Q: Is WM8281ECS/R a direct substitute?

A: WM8281ECS/R differs in interface specification, supporting only SLIMbus rather than the full I2C, SLIMbus, and SPI set. Substitution requires confirmation that the application design uses only SLIMbus communication. Several electrical parameters are not specified for this part.

Q: How do package differences affect substitution?

A: All substitute parts use WLCSP (Wafer Level Chip Scale Package) technology. Package pin counts vary: CS47L85-CWZR uses 176-UFBGA, CS47L35-CWZR uses 101-UFBGA, CS47L90-CWZR uses 173-UFBGA, and WM8281ECS/R uses 138-WFBGA. PCB layout and footprint redesign is required for any substitution.

Q: Are all substitutes RoHS compliant?

A: Yes. The original CS47L85-CWZR is RoHS Compliant. All three substitute parts are ROHS3 Compliant, which represents an enhanced environmental standard.

Q: What is the MSL rating significance?

A: All parts, including the original and substitutes, carry MSL Rating 1 (Unlimited), indicating no moisture sensitivity limitations during storage and handling.