CS43L22-CNZ Equivalent & Substitute Parts

Part Overview

The CS43L22-CNZ is a 24-bit audio DAC with 96 kHz sampling rate manufactured by Cirrus Logic Inc., designed for stereo audio applications requiring I2S interface connectivity. This component operates on dual analog and digital supply voltages (1.65V to 2.63V) and is housed in a 40-QFN surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute components is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

CS43L22-CNZ

Cirrus Logic Inc.In Stock: 5280CS43L22-CNZ Datasheet

Current PartRFQ

WM8962BECSN/R

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS43L22-CNZ is determined by the following critical parameters:

• Audio Resolution: 24-bit minimum resolution required for equivalent audio fidelity
• Stereo Channels: 2-channel configuration for dual audio output
• Sampling Rate: 96 kHz support for high-quality audio processing
• Data Interface: I2S or compatible digital audio interface for system integration
• Supply Voltage Compatibility: Operating voltage ranges must overlap with system design specifications
• Operating Temperature Range: -40°C to 85°C industrial temperature support
• Surface Mount Packaging: QFN or equivalent compact surface mount package for PCB integration
• Compliance Standards: ROHS3 compliance and EAR99 classification maintained

The WM8962BECSN/R qualifies as a substitute based on matching 24-bit resolution, 2-channel stereo audio capability, compatible digital interfaces (I2C/SPI in addition to I2S capability), overlapping supply voltage ranges, identical operating temperature range, and equivalent RoHS3 compliance status.

Parameter Comparison

Engineering Selection Recommendations

The WM8962BECSN/R is qualified as a direct substitute for the CS43L22-CNZ based on the following engineering criteria:

Compliance & Regulatory: Both components maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, ensuring regulatory continuity across design transitions.

Product Status: The WM8962BECSN/R maintains Active product status, providing long-term availability and supply chain stability compared to the CS43L22-CNZ Last Time Buy designation.

Functional Equivalence: Both components deliver 24-bit stereo audio processing with matching operating temperature ranges (-40°C to 85°C), supporting equivalent audio quality and reliability requirements.

Interface Compatibility: While the CS43L22-CNZ uses I2S exclusively, the WM8962BECSN/R supports I2C and SPI control interfaces, providing enhanced system integration flexibility without compromising I2S audio data compatibility.

Packaging Consideration: The WM8962BECSN/R uses 49-CSP (3.6x3.9) packaging versus the 40-QFN (6x6) of the original part. PCB layout redesign is required to accommodate the different package footprint and pin configuration.

Supply Voltage: The WM8962BECSN/R digital supply range (1.62V to 3.6V) exceeds the original specification, providing broader system design flexibility. Analog supply range (1.7V to 2V) is narrower than the original but remains compatible with typical 1.8V audio supply rails.

Frequently Asked Questions (FAQ)

Q: Can the WM8962BECSN/R directly replace the CS43L22-CNZ without PCB modifications?

A: No. The WM8962BECSN/R uses a 49-CSP package (3.6x3.9 mm) compared to the CS43L22-CNZ 40-QFN package (6x6 mm). Pin count, spacing, and layout differ significantly, requiring PCB redesign and re-layout of the audio signal path and power distribution.

Q: What are the key electrical differences between these components?

A: Both components provide 24-bit stereo audio at 96 kHz sampling rate. The WM8962BECSN/R includes integrated ADC functionality (2 ADCs / 2 DACs) versus the CS43L22-CNZ DAC-only architecture. Digital supply voltage range is broader on the WM8962BECSN/R (1.62V to 3.6V versus 1.65V to 2.63V), while analog supply range is narrower (1.7V to 2V versus 1.65V to 2.63V).

Q: Are the data interfaces compatible?

A: The CS43L22-CNZ uses I2S for audio data. The WM8962BECSN/R supports I2C and SPI for control, with I2S audio data compatibility. Firmware and control software modifications are required to manage the different control interface protocols.

Q: What is the moisture sensitivity difference?

A: The CS43L22-CNZ has MSL 3 (168 hours), while the WM8962BECSN/R has MSL 1 (unlimited). The WM8962BECSN/R offers superior moisture resistance, reducing handling and storage constraints during manufacturing.

Q: Are both components available in equivalent quantities?

A: Current inventory shows 5,180 pcs of CS43L22-CNZ (Last Time Buy status) and 6,140 pcs of WM8962BECSN/R (Active status). The WM8962BECSN/R provides superior long-term availability due to active production status.