CS35L01-CWZR Equivalent & Substitute Parts

Part Overview

The CS35L01-CWZR is a Class D mono amplifier IC manufactured by Cirrus Logic Inc., designed to deliver 3W output power at 4Ohm load in a compact 9-WLCSP package. This device is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain electrical compatibility across supply voltage, output power, and thermal protection specifications while accommodating potential package and feature variations.

Substiute Parts

CS35L01-CWZR

Cirrus Logic Inc.In Stock: 16334CS35L01-CWZR Datasheet

Current PartRFQ

LM4670ITLX/NOPB

Texas InstrumentsIn Stock: 6377LM4670ITLX/NOPB Datasheet

MFR RecommendedRFQ

TPA2028D1YZFR

Texas InstrumentsIn Stock: 69844TPA2028D1YZFR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS35L01-CWZR is determined by the following critical parameters:

Mandatory Matching Criteria:

• Amplifier Type: Class D
• Output Configuration: 1-Channel (Mono)
• Max Output Power: 3W @ 4Ohm load
• Supply Voltage Range: Must encompass or overlap 2.5V ~ 5.5V
• Mounting Type: Surface Mount
• Protection Features: Short-Circuit and Thermal Protection, Shutdown

Allowable Variations:

• Package type (9-WLCSP, 9-DSBGA, 9-UFBGA acceptable as pin-compatible alternatives)
• Operating temperature range (wider ranges acceptable)
• Additional features (AGC, I2C, DRC, Volume Control permitted as enhancements)
• Product status (Active preferred over Obsolete)

Both identified substitute parts meet these criteria and are classified as direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

LM4670ITLX/NOPB (Texas Instruments Boomer® Series)

This substitute is classified as Active product status, ensuring long-term availability and manufacturing support. The LM4670ITLX/NOPB maintains electrical equivalence across all critical parameters: Class D topology, 3W mono output at 4Ohm, and overlapping supply voltage range (2.4V ~ 5.5V). The extended operating temperature range (-40°C ~ 85°C) provides broader environmental compatibility compared to the CS35L01-CWZR. ROHS3 compliance and unlimited moisture sensitivity rating align with modern manufacturing standards. Package transition from 9-WLCSP to 9-DSBGA requires PCB layout verification for pin compatibility and thermal management. This part is recommended for applications requiring direct functional replacement with minimal feature differentiation.

TPA2028D1YZFR (Texas Instruments SmartGain™ Series)

This substitute offers Active product status with identical electrical core specifications: Class D amplification, 3W mono output at 4Ohm, and matching supply voltage range (2.5V ~ 5.5V). The TPA2028D1YZFR includes integrated AGC (Automatic Gain Control), DRC (Dynamic Range Control), I2C interface, and volume control functionality, providing enhanced signal processing capabilities beyond the original CS35L01-CWZR. Extended operating temperature range (-40°C ~ 85°C) and ROHS3 compliance support modern design requirements. Package transition to 9-DSBGA requires PCB layout assessment. This part is recommended for applications where advanced audio processing features and long-term product availability justify potential firmware or control interface modifications.

Frequently Asked Questions (FAQ)

Q: Can LM4670ITLX/NOPB and TPA2028D1YZFR be used interchangeably with CS35L01-CWZR?

A: Both parts meet the mandatory electrical substitution criteria: Class D amplifier type, 1-channel mono configuration, 3W output power at 4Ohm load, compatible supply voltage ranges, and required protection features. Pin-to-pin compatibility must be verified during PCB layout transition from 9-WLCSP to 9-DSBGA packages.

Q: What is the primary difference between the two substitute options?

A: LM4670ITLX/NOPB provides direct functional equivalence with minimal feature additions. TPA2028D1YZFR includes integrated AGC, DRC, I2C control, and volume control, requiring potential firmware modifications but offering enhanced audio processing capabilities.

Q: Does the package change from 9-WLCSP to 9-DSBGA affect compatibility?

A: Both 9-WLCSP and 9-DSBGA are ball grid array packages with different footprints. PCB layout redesign is required, including pad pattern, via placement, and thermal management considerations. Pin functionality remains equivalent.

Q: Are both substitute parts currently in production?

A: Yes. Both LM4670ITLX/NOPB and TPA2028D1YZFR are classified as Active products, ensuring manufacturing continuity and long-term availability, unlike the obsolete CS35L01-CWZR.

Q: What is the thermal protection difference between LM4670ITLX/NOPB and TPA2028D1YZFR?

A: LM4670ITLX/NOPB provides short-circuit protection without specified thermal protection. TPA2028D1YZFR includes both short-circuit and thermal protection, matching the original CS35L01-CWZR specification more closely.

Q: Do the substitute parts require different supply voltage filtering or decoupling?

A: All three parts operate within overlapping supply voltage ranges (2.4V ~ 5.5V minimum). Decoupling and filtering requirements should be verified against individual device datasheets, as component-level recommendations may vary.

Q: Is the extended operating temperature range of the substitutes a concern?

A: No. Extended operating temperature ranges (-40°C ~ 85°C for substitutes versus -10°C ~ 70°C for original) provide broader environmental compatibility and do not restrict use in applications within the original temperature specification.