PCM2906BDB Equivalent & Substitute Parts

Part Overview

The PCM2906BDB is a stereo audio codec with USB interface manufactured by Texas Instruments, designed for 16-bit audio applications requiring dual ADC/DAC channels. This component integrates sigma-delta conversion technology and operates across a 4.35V to 5.25V supply range in a 28-SSOP surface mount package.

The PCM2906BDB carries a "Not For New Designs" product status, indicating that Texas Instruments has transitioned this part to end-of-life. For new development projects, identifying functionally equivalent active alternatives is essential to ensure long-term supply chain viability and design sustainability.

Substiute Parts

PCM2906BDB

Texas InstrumentsIn Stock: 1144PCM2906BDB Datasheet

Current PartRFQ

PCM2906CDB

Texas InstrumentsIn Stock: 2545PCM2906CDB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCM2906BDB is determined by the following critical parameters:

• Functional Architecture: Stereo audio codec with USB interface, dual ADC/DAC channels, 16-bit resolution, and sigma-delta conversion
• Package Compatibility: 28-SSOP surface mount package with identical 5.30mm width
• Operating Temperature Range: -25°C to 85°C
• Interface Protocol: USB data interface
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The PCM2906CDB qualifies as a direct substitute based on matching all critical functional and mechanical parameters. Both parts share the same base product number (PCM2906), identical package geometry, and equivalent audio specifications. The primary distinction is the PCM2906CDB's active product status and modified supply voltage range.

Parameter Comparison

Engineering Selection Recommendations

The PCM2906CDB is the manufacturer-recommended substitute for the PCM2906BDB. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment across design transitions.

The PCM2906CDB carries active product status, providing assured long-term availability and manufacturing support. This status distinction is significant for production designs requiring component continuity beyond the PCM2906BDB's end-of-life designation.

The primary design consideration is the supply voltage differential. The PCM2906BDB operates at 4.35V to 5.25V, while the PCM2906CDB operates at 3.1V to 4.6V. Designs currently powered at 5V will require voltage regulation or power supply modification to accommodate the PCM2906CDB. Conversely, designs operating at 3.3V can directly adopt the PCM2906CDB without additional power conditioning.

Audio performance metrics remain equivalent across both parts, with the PCM2906CDB demonstrating a marginal improvement in DAC signal-to-noise ratio (96 dB versus 93 dB).

Frequently Asked Questions (FAQ)

Q: Can the PCM2906CDB directly replace the PCM2906BDB in existing designs?

A: Mechanical and functional compatibility is confirmed. The 28-SSOP package geometry, pin configuration, and audio specifications are identical. However, the supply voltage range differs significantly. Direct replacement requires verification that your power supply can deliver 3.1V to 4.6V to the PCM2906CDB, or implementation of voltage regulation circuitry.

Q: What is the significance of the "Not For New Designs" status on the PCM2906BDB?

A: This designation indicates that Texas Instruments has concluded manufacturing and support for this part. New product development should utilize the PCM2906CDB, which carries active status and assured supply chain continuity.

Q: Are the audio specifications identical between these parts?

A: Audio resolution, channel configuration, and dynamic range specifications are identical. The PCM2906CDB exhibits a 3 dB improvement in DAC signal-to-noise ratio (96 dB versus 93 dB typical).

Q: Do both parts require identical PCB layout and component placement?

A: Yes. The 28-SSOP package dimensions and pin assignments are identical, permitting direct PCB footprint compatibility without layout modification.

Q: What compliance certifications apply to both parts?

A: Both the PCM2906BDB and PCM2906CDB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.