PCM2906BDBR Equivalent & Substitute Parts

Part Overview

The PCM2906BDBR 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. This device is classified as not for new designs, indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for ongoing production support, maintenance applications, and legacy system replacements where continued component availability is required.

Substiute Parts

PCM2906BDBR

Texas InstrumentsIn Stock: 3985PCM2906BDBR Datasheet

Current PartRFQ

PCM2906CDBR

Texas InstrumentsIn Stock: 4328PCM2906CDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM2906BDBR is determined by the following critical parameters that must remain consistent:

• Stereo audio codec architecture with USB data interface
• 16-bit resolution with 2 ADCs and 2 DACs
• Sigma Delta modulation capability
• 28-SSOP surface mount package with identical physical dimensions (0.209", 5.30mm Width)
• Operating temperature range of -25°C to 85°C
• RoHS3 compliance and MSL Level 1 rating

The PCM2906CDBR qualifies as a direct substitute based on these parameters. Differences in supply voltage ranges and minor performance variations in signal-to-noise ratio do not affect functional substitutability in applications designed for the PCM2906BDBR.

Parameter Comparison

Engineering Selection Recommendations

The PCM2906CDBR is the manufacturer-recommended substitute for the PCM2906BDBR. The primary distinction between these parts is product status: the PCM2906BDBR is classified as not for new designs, while the PCM2906CDBR maintains active status with ongoing manufacturer support.

Both devices maintain ROHS3 compliance and identical MSL Level 1 ratings, ensuring equivalent environmental and regulatory compliance. The PCM2906CDBR operates at lower supply voltages (3.1V to 4.6V) compared to the PCM2906BDBR (4.35V to 5.25V), which may require power supply circuit modifications in legacy designs. The DAC signal-to-noise ratio improvement in the PCM2906CDBR (96 dB versus 93 dB) represents enhanced performance without functional incompatibility.

For applications requiring the PCM2906BDBR, the PCM2906CDBR provides continued component availability with active manufacturer support and improved performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PCM2906CDBR directly replace the PCM2906BDBR in existing designs?

A: Functional replacement is possible due to identical package, pin configuration, and core audio codec specifications. However, the different supply voltage requirements (3.1V to 4.6V versus 4.35V to 5.25V) necessitate power supply circuit evaluation and potential modification before implementation.

Q: What are the key differences between these two parts?

A: The primary differences are product status (active versus not for new designs), supply voltage ranges, and DAC signal-to-noise ratio (96 dB versus 93 dB). All other critical parameters including package type, resolution, interface, and operating temperature remain identical.

Q: Are both parts available in the same packaging options?

A: Both the PCM2906BDBR and PCM2906CDBR use the 28-SSOP surface mount package with identical physical dimensions. The PCM2906BDBR is supplied in Tape & Reel (TR) packaging, while the PCM2906CDBR is available in Cut Tape (CT) and Digi-Reel® packaging.

Q: Do these parts have the same compliance certifications?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (unlimited) moisture sensitivity ratings. Regulatory compliance is equivalent between the two devices.

Q: What should be considered when selecting between these substitutes?

A: Component selection should prioritize supply voltage compatibility with existing power delivery circuits. If the application can accommodate 3.1V to 4.6V supply voltages, the PCM2906CDBR is preferred due to active product status and improved DAC performance. If 4.35V to 5.25V supply voltage is required, design modifications would be necessary.