CS53L21-DNZ Equivalent & Substitute Parts

Part Overview

The CS53L21-DNZ is a 24-bit audio ADC from Cirrus Logic Inc. designed for high-resolution audio acquisition at sampling rates up to 96 kHz. This component operates with dual supply voltages (analog: 1.65V–1.89V, 2.37V–2.63V; digital: derived from analog supply) and is housed in a 32-QFN surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent or substitute components is necessary for ongoing design support, inventory management, and long-term product viability.

Substiute Parts

CS53L21-DNZ

Cirrus Logic Inc.In Stock: 1156CS53L21-DNZ Datasheet

Current PartRFQ

WM8962BECSN/R

Cirrus Logic Inc.In Stock: 6197WM8962BECSN/R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The WM8962BECSN/R is identified as a manufacturer-recommended substitute for the CS53L21-DNZ. Substitution eligibility is determined by the following critical parameters:

• Resolution: Both parts support 24-bit audio processing
• Sampling Rate Capability: Both support high-resolution audio at 96 kHz and above
• Operating Temperature Range: Both operate across −40°C to +85°C
• RoHS Compliance: Both meet ROHS3 requirements
• Manufacturer: Both are Cirrus Logic Inc. products, ensuring design continuity and support consistency

The WM8962BECSN/R functions as a stereo audio codec with integrated ADC and DAC stages, whereas the CS53L21-DNZ is a dedicated ADC. This functional difference requires careful evaluation of system architecture and interface requirements during substitution.

Parameter Comparison

Engineering Selection Recommendations

Selection between the CS53L21-DNZ and WM8962BECSN/R must account for the following factors:

CS53L21-DNZ: Appropriate for applications requiring a dedicated 3-channel ADC with specific dual-supply voltage architecture. Product status is Last Time Buy, limiting availability for new designs. Existing designs currently using this part should establish inventory reserves or initiate migration planning.

WM8962BECSN/R: Suitable for applications requiring integrated stereo audio codec functionality with both ADC and DAC stages. Active product status ensures ongoing availability and manufacturer support. The part offers greater digital supply voltage flexibility (1.62V–3.6V) and superior moisture sensitivity rating (MSL 1 vs. MSL 3), reducing handling and storage constraints. However, the 2-channel ADC configuration differs from the 3-channel architecture of the CS53L21-DNZ, requiring system-level architectural review.

Both parts meet identical operating temperature and RoHS compliance requirements, supporting equivalent environmental performance in target applications.

Frequently Asked Questions (FAQ)

Q: Can the WM8962BECSN/R directly replace the CS53L21-DNZ in existing designs?

A: Direct replacement requires architectural evaluation. The WM8962BECSN/R provides 2 ADC channels versus 3 on the CS53L21-DNZ, and includes integrated DAC functionality. PCB layout, signal routing, and firmware must be reviewed to confirm compatibility with the new package (49-CSP vs. 32-QFN) and interface protocol (I2C/SPI vs. Serial).

Q: What are the key differences in supply voltage requirements?

A: The CS53L21-DNZ requires dual analog supplies (1.65V–1.89V and 2.37V–2.63V) with digital supply derived from the analog domain. The WM8962BECSN/R separates analog (1.7V–2.0V) and digital (1.62V–3.6V) supplies, offering greater flexibility in power distribution design.

Q: How do the package differences affect PCB design?

A: The CS53L21-DNZ uses a 32-QFN (5×5) package, while the WM8962BECSN/R uses a 49-CSP (3.6×3.9) package. The CSP package is smaller but requires different PCB layout techniques, including via placement and thermal management considerations. Footprint redesign is necessary.

Q: Are both parts equally available for new production?

A: The CS53L21-DNZ is in Last Time Buy status with limited future availability. The WM8962BECSN/R is Active, ensuring continued supply and manufacturer support for new designs and production runs.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements. The WM8962BECSN/R offers superior moisture handling (MSL 1 vs. MSL 3), reducing storage and handling sensitivity.