CS3511-CNZR Equivalent & Substitute Parts

Part Overview

The CS3511-CNZR is a Class D stereo amplifier IC manufactured by Cirrus Logic Inc., designed for 2-channel audio amplification applications. This device delivers 11.8W per channel at 6Ω load impedance and operates across a supply voltage range of 8.5V to 13.2V. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain stereo Class D amplification topology while accommodating the electrical and mechanical constraints of the original application.

Substiute Parts

CS3511-CNZR

Cirrus Logic Inc.In Stock: 981CS3511-CNZR Datasheet

Current PartRFQ

PAM8006ATR

Diodes IncorporatedIn Stock: 35471PAM8006ATR Datasheet

MFR RecommendedRFQ

TPA3117D2RHBT

Texas InstrumentsIn Stock: 2264TPA3117D2RHBT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS3511-CNZR is determined by the following criteria:

Mandatory Compatibility Parameters:

• Amplifier topology: Class D stereo configuration
• Output channels: 2-Channel (Stereo)
• Package form factor: 32-pin QFN with exposed pad
• Mounting technology: Surface Mount
• Thermal and short-circuit protection capability
• Mute functionality

Electrical Compatibility Considerations:

• Supply voltage range must encompass or exceed the original 8.5V ~ 13.2V specification
• Output power rating must meet or exceed 11.8W per channel at comparable load impedance
• Operating temperature range should support the original -10°C ~ 70°C minimum requirement

Identified Substitutes: Both PAM8006ATR (Diodes Incorporated) and TPA3117D2RHBT (Texas Instruments) satisfy the core topology and package requirements. These parts maintain stereo Class D amplification in 32-pin QFN packages with integrated protection features and mute control.

Parameter Comparison

Engineering Selection Recommendations

PAM8006ATR Selection Criteria: The PAM8006ATR is suitable for applications where the original CS3511-CNZR supply voltage range (8.5V ~ 13.2V) is maintained and output power requirements do not exceed 10W per channel at 8Ω load. This substitute offers extended supply voltage capability (8V ~ 18V) and superior moisture sensitivity rating (MSL 1). The part is active in production with ROHS3 compliance. Package dimensions differ (5x5 vs. 6x6), requiring PCB layout verification. Differential input capability is not provided; single-ended input designs must be accommodated.

TPA3117D2RHBT Selection Criteria: The TPA3117D2RHBT provides higher output power (15W per channel at 8Ω) and extended operating temperature range (-40°C ~ 85°C), exceeding original specifications. This part maintains differential input functionality and is active in production with ROHS3 compliance. Supply voltage range extends to 26V, providing greater design flexibility. Package dimensions differ (5x5 vs. 6x6), requiring PCB layout verification. Moisture sensitivity level matches the original (MSL 2, 1 Year).

Compliance Considerations: Both substitute parts carry REACH Unaffected and EAR99 ECCN classifications, matching the original part. ROHS3 compliance is confirmed for both alternatives, supporting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can PAM8006ATR and TPA3117D2RHBT be used interchangeably with CS3511-CNZR?

A: Both parts are functionally equivalent as Class D stereo amplifiers in 32-pin QFN packages. However, direct pin-for-pin substitution requires verification. PAM8006ATR lacks differential input capability, while TPA3117D2RHBT retains this feature. PCB layout modifications are necessary due to package size differences (5x5 vs. 6x6).

Q: What are the key electrical differences between the substitutes?

A: PAM8006ATR delivers 10W per channel at 8Ω with supply range 8V ~ 18V. TPA3117D2RHBT delivers 15W per channel at 8Ω with supply range 8V ~ 26V. The original CS3511-CNZR delivers 11.8W per channel at 6Ω with supply range 8.5V ~ 13.2V. Load impedance and supply voltage must be verified for application compatibility.

Q: Are there package compatibility concerns?

A: Yes. The CS3511-CNZR uses a 6x6mm QFN package, while both substitutes use 5x5mm QFN packages. This dimensional difference requires PCB footprint redesign. Pin count remains constant at 32 pins, but pinout verification is mandatory before implementation.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For applications requiring differential inputs and higher power output, TPA3117D2RHBT is appropriate. For cost-sensitive applications with single-ended input capability, PAM8006ATR is suitable. Both parts are active in production with superior availability compared to the obsolete CS3511-CNZR.

Q: What is the impact of moisture sensitivity level differences?

A: PAM8006ATR carries MSL 1 (Unlimited shelf life), providing superior moisture protection during storage and handling. CS3511-CNZR and TPA3117D2RHBT both carry MSL 2 (1 Year), requiring controlled storage conditions. This affects component procurement and inventory management strategies.

Q: Are thermal protection features equivalent across all three parts?

A: All three parts include short-circuit and thermal protection. CS3511-CNZR includes standby mode; PAM8006ATR and TPA3117D2RHBT include shutdown mode. Both protection approaches are functionally equivalent for thermal management, though shutdown mode provides additional power conservation capability.