CS42L51-DNZ Equivalent & Substitute Parts

Part Overview

The CS42L51-DNZ is a stereo audio codec manufactured by Cirrus Logic Inc., designed for high-fidelity audio interface applications. This 32-QFN surface mount device integrates dual ADCs and DACs with 24-bit resolution and sigma-delta modulation, supporting analog supply voltages of 1.8V and 2.5V. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute components is essential for design continuity and long-term product support.

Substiute Parts

CS42L51-DNZ

Cirrus Logic Inc.In Stock: 841CS42L51-DNZ Datasheet

Current PartRFQ

WM8962BECSN/R

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS42L51-DNZ is determined by the following critical parameters:

• Audio Codec Function: Stereo audio interface with dual ADCs and DACs
• Resolution: 24-bit digital audio processing
• Sigma-Delta Modulation: Required for audio quality
• Dynamic Range: ADC and DAC performance specifications (98 dB typical)
• Supply Voltage Compatibility: Analog and digital supply voltage ranges
• Operating Temperature Range: -40°C to 85°C
• Surface Mount Packaging: QFN or equivalent ball grid array packages
• Compliance: ROHS3 and REACH compliance status

The WM8962BECSN/R qualifies as a substitute based on matching core audio codec functionality, 24-bit resolution, dual ADC/DAC architecture, sigma-delta modulation, identical operating temperature range, and equivalent compliance certifications. Differences in data interface (Serial vs. I2C/SPI), supply voltage ranges, and physical package form factor require design-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The WM8962BECSN/R is an active product from the same manufacturer, providing long-term availability and supply chain stability compared to the CS42L51-DNZ Last Time Buy status. Both devices maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and consumer applications.

Design considerations for substitution include:

• Package Transition: Migration from 32-QFN (5x5) to 49-CSP (3.6x3.9) requires PCB layout redesign
• Data Interface: CS42L51-DNZ uses Serial interface; WM8962BECSN/R supports I2C and SPI protocols, necessitating firmware and control logic modifications
• Supply Voltage Ranges: WM8962BECSN/R analog supply operates at 1.7V ~ 2V (narrower than CS42L51-DNZ 1.8V, 2.5V); digital supply extends to 3.6V maximum
• Moisture Sensitivity: WM8962BECSN/R MSL 1 rating provides superior moisture tolerance compared to CS42L51-DNZ MSL 3

Frequently Asked Questions (FAQ)

Q: Can the WM8962BECSN/R directly replace the CS42L51-DNZ without design changes?

A: No. While both are 24-bit stereo audio codecs with dual ADCs/DACs from Cirrus Logic, they differ in data interface protocol, package form factor, and supply voltage specifications. PCB layout redesign and firmware modifications are required.

Q: What is the primary reason for substitution?

A: The CS42L51-DNZ is in Last Time Buy status, indicating discontinued production. The WM8962BECSN/R is an active product offering equivalent audio codec functionality with improved long-term availability.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The WM8962BECSN/R has superior moisture handling (MSL 1 vs. MSL 3), reducing risk in humid storage and assembly environments.

Q: What are the critical electrical differences?

A: The WM8962BECSN/R operates with analog supply 1.7V ~ 2V and digital supply 1.62V ~ 3.6V, compared to the CS42L51-DNZ fixed supplies of 1.8V and 2.5V. Verify power supply design compatibility before substitution.

Q: How do the data interfaces differ?

A: The CS42L51-DNZ uses a Serial interface for audio data and control. The WM8962BECSN/R supports I2C and SPI protocols, requiring changes to the host microcontroller firmware and communication protocol implementation.

Q: What package considerations apply?

A: The CS42L51-DNZ uses 32-QFN (5x5) with exposed pad; the WM8962BECSN/R uses 49-CSP (3.6x3.9). The substitute has a larger pin count and different footprint, requiring complete PCB redesign.