CS3318-CQZ Equivalent & Substitute Parts

Part Overview

The CS3318-CQZ is an 8-channel digital audio volume control IC manufactured by Cirrus Logic Inc., housed in a 48-LQFP surface mount package. This component is designed for audio systems requiring precise volume management across multiple channels via I2C or SPI interface control.

The CS3318-CQZ is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of audio systems utilizing this volume control architecture.

Substiute Parts

CS3318-CQZ

Cirrus Logic Inc.In Stock: 3520CS3318-CQZ Datasheet

Current PartRFQ

CS3318K-CQZ

Cirrus Logic Inc.In Stock: 1604CS3318K-CQZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS3318-CQZ is determined by strict equivalence across the following critical parameters:

• Channel Configuration: 8-channel architecture maintained
• Interface Protocol: I2C and SPI compatibility required
• Package Type: 48-LQFP (7x7) surface mount form factor
• Supply Voltage Range: 7.6V ~ 9.45V operational window
• Operating Temperature Range: -10°C ~ 70°C
• Compliance Standards: ROHS3 compliance and MSL 3 rating

The CS3318K-CQZ meets all substitution criteria as a direct equivalent, with the primary distinction being its active product status and availability in tray packaging.

Parameter Comparison

Engineering Selection Recommendations

The CS3318K-CQZ is the manufacturer-recommended substitute for the obsolete CS3318-CQZ. Both components maintain identical electrical specifications, channel configuration, interface protocols, and thermal operating ranges. The CS3318K-CQZ carries active product status, ensuring continued availability and supply chain support.

Both parts satisfy ROHS3 compliance requirements and maintain equivalent moisture sensitivity ratings. The CS3318K-CQZ is supplied in tray packaging, which may differ from original procurement specifications but does not affect functional or electrical compatibility.

Selection of the CS3318K-CQZ eliminates obsolescence risk while preserving full design compatibility with existing audio volume control implementations.

Frequently Asked Questions (FAQ)

Q: Can the CS3318K-CQZ directly replace the CS3318-CQZ without circuit modifications?

A: Yes. Both components share identical channel count, interface protocols (I2C/SPI), supply voltage range, operating temperature specifications, and 48-LQFP package geometry. No circuit modifications are required.

Q: What is the significance of the "K" designation in CS3318K-CQZ?

A: The "K" suffix indicates a variant designation within the CS3318 product family. The CS3318K-CQZ maintains functional and electrical equivalence to the CS3318-CQZ while offering active product status and current manufacturing support.

Q: Are there differences in supply voltage specifications between these parts?

A: The CS3318-CQZ specifies 7.6V ~ 9.45V, while the CS3318K-CQZ specifies ±7.6V ~ 9.45V. Both operate within compatible voltage windows for standard audio system applications. Verify your specific power supply configuration against both specifications.

Q: Does packaging format affect electrical performance?

A: No. The tray packaging of the CS3318K-CQZ is a logistics and handling format only. Electrical performance, thermal characteristics, and functional behavior remain identical to the original part.

Q: Are both parts RoHS compliant?

A: Yes. Both the CS3318-CQZ and CS3318K-CQZ are ROHS3 compliant and carry identical MSL 3 moisture sensitivity ratings.