PCM2906DBR Equivalent & Substitute Parts

Part Overview

The PCM2906DBR is a stereo audio codec with integrated USB interface manufactured by Texas Instruments. It functions as a complete audio interface solution, combining analog-to-digital and digital-to-analog conversion with USB connectivity for audio streaming applications. The device is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations. The PCM2904DBR serves as the primary equivalent alternative, offering identical electrical and mechanical specifications within the same product family.

Substiute Parts

PCM2906DBR

Texas InstrumentsIn Stock: 870PCM2906DBR Datasheet

Current PartRFQ

PCM2904DBR

National SemiconductorIn Stock: 2655PCM2904DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCM2906DBR is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Data interface protocol (USB)
• Audio resolution (16 bits)
• ADC/DAC channel configuration (2 / 2)
• Signal-to-noise ratio performance (89 dB ADC / 96 dB DAC)
• Dynamic range performance (89 dB ADC / 93 dB DAC)
• Supply voltage ranges (4.35V ~ 5.25V for both analog and digital)
• Operating temperature range (-25°C ~ 85°C)
• Sigma Delta modulation architecture

Mechanical Specifications:

• Package type (28-SSOP)
• Package dimensions (0.209", 5.30mm Width)
• Mounting technology (Surface Mount)

The PCM2904DBR meets all substitution criteria, maintaining identical electrical performance characteristics and mechanical compatibility with the PCM2906DBR.

Parameter Comparison

Engineering Selection Recommendations

The PCM2906DBR is classified as obsolete, necessitating component substitution for new procurements and system continuations. The PCM2904DBR is the direct equivalent, offering identical electrical performance and mechanical compatibility.

Selection Basis:

The PCM2904DBR maintains active product status, ensuring ongoing availability and supply chain continuity. All critical electrical parameters—including audio resolution, signal-to-noise ratio, dynamic range, supply voltage specifications, and operating temperature range—are identical to the PCM2906DBR. The mechanical package specification (28-SSOP) and mounting technology (Surface Mount) are equivalent, enabling direct board-level substitution without layout modifications.

The PCM2904DBR is ROHS3 compliant, meeting current environmental and regulatory requirements. The identical Sigma Delta architecture ensures equivalent audio processing characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PCM2904DBR be used as a direct replacement for the PCM2906DBR?

A: Yes. The PCM2904DBR is electrically and mechanically equivalent to the PCM2906DBR. All critical specifications—audio resolution, ADC/DAC configuration, signal-to-noise ratio, dynamic range, supply voltages, operating temperature range, and package dimensions—are identical. No circuit modifications are required for substitution.

Q: Are there any differences in package or pinout between these components?

A: No. Both components use the 28-SSOP package with identical dimensions (0.209", 5.30mm Width) and surface mount technology. Pinout compatibility is maintained.

Q: Why is the PCM2906DBR obsolete while the PCM2904DBR remains active?

A: Product lifecycle management results in obsolescence of certain part numbers while functionally equivalent alternatives remain in production. The PCM2904DBR continues to serve the same application requirements with identical specifications.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching data interface (USB), audio resolution (16 bits), ADC/DAC configuration (2 / 2), signal-to-noise ratio (89 dB ADC / 96 dB DAC), dynamic range (89 dB ADC / 93 dB DAC), supply voltage ranges (4.35V ~ 5.25V), operating temperature range (-25°C ~ 85°C), and Sigma Delta architecture. The PCM2904DBR matches all these parameters.

Q: Are supply voltage requirements identical between the two components?

A: Yes. Both the PCM2906DBR and PCM2904DBR require identical analog and digital supply voltages of 4.35V ~ 5.25V and operate across the same temperature range of -25°C ~ 85°C.

Q: Is the PCM2904DBR compliant with current environmental standards?

A: Yes. The PCM2904DBR is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.