PCM2906DB Equivalent & Substitute Parts

Part Overview

The PCM2906DB is a stereo audio codec with USB interface manufactured by Texas Instruments, designed for audio signal processing applications requiring 16-bit resolution with integrated analog-to-digital and digital-to-analog conversion. The device is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The PCM2906DB operates with 4.35V to 5.25V supply voltage across both analog and digital domains, housed in a 28-SSOP surface mount package.

Substiute Parts

PCM2906DB

Texas InstrumentsIn Stock: 2674PCM2906DB Datasheet

Current PartRFQ

PCM2906CDB

Texas InstrumentsIn Stock: 2545PCM2906CDB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM2906DB is determined by strict equivalence across the following critical parameters:

Functional Equivalence: Identical stereo audio codec architecture with USB data interface, 16-bit resolution, 2 ADCs and 2 DACs, and sigma-delta conversion topology.

Electrical Performance: Matching signal-to-noise ratio (89 dB ADC / 96 dB DAC) and dynamic range (89 dB ADC / 93 dB DAC) specifications.

Package Compatibility: Identical 28-SSOP surface mount package with 0.209" width and 5.30mm dimensions.

Compliance & Certification: ROHS3 compliance, MSL Level 1, and REACH unaffected status maintained across substitutes.

Allowable Variation: Supply voltage range may differ while maintaining the same package, interface, and performance characteristics. The substitute PCM2906CDB operates at 3.1V to 4.6V, representing a lower voltage variant of the same base product family.

Parameter Comparison

Engineering Selection Recommendations

The PCM2906CDB is the manufacturer-recommended substitute for the obsolete PCM2906DB. Both devices share identical functional specifications, performance characteristics, and package geometry. The primary distinction is the supply voltage requirement: the PCM2906CDB operates at 3.1V to 4.6V compared to the PCM2906DB's 4.35V to 5.25V range.

Selection of PCM2906CDB is appropriate for applications where the lower voltage specification aligns with system power architecture. The active product status of PCM2906CDB ensures ongoing availability and manufacturer support, addressing the obsolescence of the original PCM2906DB.

Both variants maintain ROHS3 compliance, MSL Level 1 moisture sensitivity, and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can PCM2906CDB directly replace PCM2906DB in existing designs?

A: Functional and package compatibility is complete. The critical consideration is supply voltage: PCM2906CDB requires 3.1V to 4.6V while PCM2906DB requires 4.35V to 5.25V. Direct replacement is possible only if the system power supply can accommodate the lower voltage specification of PCM2906CDB.

Q: Are the audio performance specifications identical between these parts?

A: Yes. Both devices provide identical signal-to-noise ratio (89 dB ADC / 96 dB DAC), dynamic range (89 dB ADC / 93 dB DAC), resolution (16-bit), and stereo audio codec architecture with USB interface.

Q: What is the significance of the product status difference?

A: PCM2906DB is classified as obsolete, indicating discontinued manufacturing and limited availability. PCM2906CDB is active, ensuring continued production, technical support, and long-term supply chain reliability.

Q: Are the physical packages identical?

A: Yes. Both parts use the 28-SSOP surface mount package with 0.209" width and 5.30mm dimensions, enabling identical PCB layout and assembly processes.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both PCM2906DB and PCM2906CDB are ROHS3 compliant, maintain MSL Level 1 moisture sensitivity rating, and are REACH unaffected, satisfying current manufacturing and environmental regulations.