PCM2906DBRG4 Equivalent & Substitute Parts

Part Overview

The PCM2906DBRG4 is a stereo audio codec with integrated USB interface manufactured by Texas Instruments. This device functions as a complete audio interface solution, combining analog-to-digital and digital-to-analog conversion with USB connectivity in a single 28-SSOP package. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations. Equivalent parts must maintain identical electrical performance, package compatibility, and functional specifications to ensure direct replacement capability.

Substiute Parts

PCM2906DBRG4

Texas InstrumentsIn Stock: 830PCM2906DBRG4 Datasheet

Current PartRFQ

PCM2904DBR

National SemiconductorIn Stock: 2655PCM2904DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM2906DBRG4 is determined by strict equivalence across the following critical parameters:

• Audio codec type and stereo configuration (2 ADCs / 2 DACs)
• USB data interface connectivity
• 16-bit resolution specification
• Sigma Delta modulation architecture
• Identical signal-to-noise ratio and dynamic range performance
• Matching supply voltage ranges for both analog and digital domains
• 28-SSOP surface mount package with identical physical dimensions
• Operating temperature range compatibility
• Compliance certifications (RoHS3, REACH status)

The PCM2904DBR qualifies as a direct substitute based on complete alignment with all specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The PCM2904DBR is the qualified substitute for the obsolete PCM2906DBRG4. Selection is based on the following engineering criteria:

Product Status Alignment: The PCM2904DBR maintains active product status, ensuring continued availability and manufacturer support. The PCM2906DBRG4 is obsolete, necessitating substitution for new designs and ongoing system maintenance.

Electrical Equivalence: All critical electrical parameters are identical between the two parts, including audio resolution, ADC/DAC configuration, signal-to-noise ratios, dynamic range, and supply voltage specifications. Both devices operate within the identical temperature range of -25°C to 85°C.

Package and Mounting Compatibility: Both parts utilize the 28-SSOP surface mount package with identical physical dimensions (0.209" width, 5.30mm). This ensures direct PCB layout compatibility without redesign requirements.

Compliance and Certification: Both parts maintain equivalent compliance status under RoHS3 and REACH regulations, with identical ECCN and HTSUS classifications, supporting regulatory requirements across manufacturing and distribution channels.

Frequently Asked Questions (FAQ)

Q: Can the PCM2904DBR be used as a direct replacement for the PCM2906DBRG4 without PCB modifications?

A: Yes. Both parts share identical 28-SSOP package dimensions and pinout compatibility. No PCB layout changes are required for substitution.

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

A: Yes. Signal-to-noise ratios (89 dB ADC / 96 dB DAC), dynamic range (89 dB ADC / 93 dB DAC), and 16-bit resolution are identical. Both employ Sigma Delta modulation architecture.

Q: What is the primary reason for substituting the PCM2906DBRG4?

A: The PCM2906DBRG4 is classified as obsolete. The PCM2904DBR is an active product with equivalent specifications, ensuring long-term availability and manufacturer support.

Q: Are supply voltage requirements the same for both parts?

A: Yes. Both the analog and digital supply voltage ranges are 4.35V to 5.25V for both parts.

Q: Do both parts support the same USB interface specification?

A: Yes. Both parts implement USB data interface connectivity with identical functional capability.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: Both parts share MSL Level 1 (Unlimited) classification, indicating identical moisture sensitivity and storage requirements.