PCM69AP-K Equivalent & Substitute Parts

Part Overview

The PCM69AP-K is an 18-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for stereo audio applications with PCM data interface support. This component operates on 5V supply and is housed in a 16-DIP through-hole package. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations where legacy component replacement is required.

Substiute Parts

PCM69AP-K

Texas InstrumentsIn Stock: 1410PCM69AP-K Datasheet

Current PartRFQ

PCM1793DB

Texas InstrumentsIn Stock: 2243PCM1793DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The PCM1793DB qualifies as a manufacturer-recommended substitute for the PCM69AP-K based on the following core substitution criteria:

Functional Compatibility Parameters:

• Both components are stereo audio DACs (2-channel configuration)
• Both maintain identical operating temperature range (-25°C to 85°C)
• Both support dual voltage supply architecture (analog and digital)
• Both achieve ROHS3 compliance and REACH unaffected status
• Both are manufactured by Texas Instruments

Design Considerations for Substitution:

• Resolution upgrade: PCM1793DB provides 24-bit resolution versus 18-bit in PCM69AP-K
• Sampling rate: PCM1793DB supports 200kHz sampling rate
• Data interface change: PCM1793DB uses I2S interface instead of PCM
• Voltage supply flexibility: PCM1793DB operates on 3V–3.6V or 5V, providing broader supply compatibility
• Package transition: PCM1793DB uses 28-SSOP surface-mount package versus 16-DIP through-hole

Parameter Comparison

Engineering Selection Recommendations

The PCM1793DB is the manufacturer-recommended substitute for PCM69AP-K applications. Selection of this substitute requires evaluation of the following factors:

Compatibility Assessment:

• The transition from PCM to I2S data interface necessitates firmware or digital signal processing modifications in the host system
• The package change from 16-DIP through-hole to 28-SSOP surface-mount requires PCB redesign and updated assembly processes
• The higher 24-bit resolution of PCM1793DB is backward-compatible with systems designed for 18-bit audio, though the additional resolution bits may require software adjustment

Compliance & Supply Status:

• PCM1793DB maintains ROHS3 compliance and REACH unaffected status, matching the environmental certifications of the original part
• PCM1793DB is actively manufactured with confirmed inventory availability (2220 units), ensuring long-term supply reliability
• PCM69AP-K is obsolete with limited remaining stock (1324 units), making transition to PCM1793DB necessary for sustained production

Electrical Compatibility:

• Both components operate within the identical temperature range (-25°C to 85°C)
• PCM1793DB's expanded voltage supply range (3V–3.6V, 5V) provides design flexibility beyond the fixed 5V requirement of PCM69AP-K
• Both components feature dual analog and digital supply architecture

Frequently Asked Questions (FAQ)

Q: Can PCM1793DB directly replace PCM69AP-K without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to package differences (16-DIP versus 28-SSOP) and different pin configurations. Additionally, the data interface change from PCM to I2S requires digital signal path modifications in the host system.

Q: What is the primary reason for substitution?

A: PCM69AP-K is classified as obsolete. PCM1793DB is the manufacturer-recommended active substitute, ensuring continued availability and long-term supply chain reliability.

Q: Does the 24-bit resolution of PCM1793DB create compatibility issues with 18-bit audio systems?

A: No. The higher resolution is backward-compatible. Systems designed for 18-bit audio will function with PCM1793DB; the additional 6 bits of resolution do not create incompatibility. However, digital interface firmware must be updated to support I2S protocol instead of PCM.

Q: What are the package implications of substitution?

A: PCM69AP-K uses through-hole 16-DIP packaging for traditional PCB assembly. PCM1793DB uses surface-mount 28-SSOP packaging, requiring updated PCB layout, trace routing, and automated assembly processes.

Q: Are there voltage supply considerations for substitution?

A: PCM69AP-K requires fixed 5V supply. PCM1793DB accepts 3V–3.6V or 5V, providing design flexibility. Existing 5V supply designs are fully compatible with PCM1793DB.

Q: What certifications apply to both components?

A: Both PCM69AP-K and PCM1793DB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.