CS4399-CNZR Equivalent & Substitute Parts

Part Overview

The CS4399-CNZR is a 32-bit audio digital-to-analog converter (DAC) manufactured by Cirrus Logic Inc., designed for high-resolution audio applications supporting DSD and PCM data interfaces at sampling rates up to 384 kHz. The device is packaged in a 40-pin WFQFN with exposed pad and operates across a supply voltage range of 1.66V to 1.94V.

The CS4399-CNZR is classified as obsolete. Equivalent substitute parts are available from Cirrus Logic's active product portfolio, offering comparable or enhanced functionality within the same package footprint and electrical specifications.

Substiute Parts

CS4399-CNZR

Cirrus Logic Inc.In Stock: 877CS4399-CNZR Datasheet

Current PartRFQ

CS43131-CNZR

Cirrus Logic Inc.In Stock: 3421CS43131-CNZR Datasheet

MFR RecommendedRFQ

CS43198-CNZR

Cirrus Logic Inc.In Stock: 4643CS43198-CNZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS4399-CNZR are selected based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

• Resolution: 32 bits (matching the original specification)
• Number of Channels: 2 (matching the original specification)
• Package / Case: 40-WFQFN Exposed Pad (identical physical footprint)
• Voltage - Supply: 1.66V ~ 1.94V (matching supply range)
• Operating Temperature: -10°C ~ 70°C (matching operating range)
• Mounting Type: Surface Mount (identical mounting method)
• Manufacturer: Cirrus Logic Inc. (same manufacturer ecosystem)

Substitute Parts Identified:

• CS43131-CNZR: Active product status, maintains core electrical specifications
• CS43198-CNZR: Active product status, maintains core electrical specifications with enhanced differential output capability

Both substitutes meet the mandatory electrical and mechanical parameters required for direct replacement in applications designed for the CS4399-CNZR.

Parameter Comparison

Engineering Selection Recommendations

CS43131-CNZR is suitable for applications requiring a direct functional replacement with active product support. This part maintains identical electrical specifications and package configuration as the CS4399-CNZR while offering the advantage of active product status and improved availability.

CS43198-CNZR provides an alternative with enhanced flexibility through differential output capability and dual reference type options (external and internal). This part is recommended for designs that can leverage differential output configurations or require flexible reference sourcing. Active product status ensures long-term supply chain reliability.

Both substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original CS4399-CNZR. Selection between CS43131-CNZR and CS43198-CNZR should be based on specific application requirements regarding output configuration and reference type needs.

Frequently Asked Questions (FAQ)

Q: Can CS43131-CNZR or CS43198-CNZR be used as direct pin-for-pin replacements for CS4399-CNZR?

A: Both substitute parts share the identical 40-WFQFN package footprint, supply voltage range (1.66V ~ 1.94V), operating temperature range (-10°C ~ 70°C), and mounting type (surface mount). Pin-level compatibility requires verification against specific application schematics and firmware support for the data interface used.

Q: What is the key difference between CS43131-CNZR and CS43198-CNZR?

A: CS43198-CNZR provides differential output capability and supports both external and internal reference types, while CS43131-CNZR offers single-ended output with internal reference only. Both maintain identical 32-bit resolution, 2-channel configuration, and core electrical specifications.

Q: Why is the CS4399-CNZR classified as obsolete?

A: The CS4399-CNZR has reached end-of-life status in Cirrus Logic's product portfolio. Active alternatives (CS43131-CNZR and CS43198-CNZR) provide equivalent or enhanced functionality with ongoing manufacturer support and supply availability.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: All three parts are ROHS3 compliant and REACH unaffected. The substitute parts maintain equivalent regulatory status to the CS4399-CNZR. Moisture sensitivity level differs: CS4399-CNZR is MSL 1 (unlimited), while both substitutes are MSL 3 (168 hours), requiring appropriate handling during storage and assembly.

Q: What data interfaces do the substitute parts support?

A: CS43131-CNZR and CS43198-CNZR support I2S data interface. The original CS4399-CNZR supports DSD and PCM interfaces. Application firmware and interface circuitry must be evaluated for compatibility with the I2S standard used by substitute parts.